{"id":23325,"date":"2024-04-10T12:10:06","date_gmt":"2024-04-10T09:10:06","guid":{"rendered":"https:\/\/fractory.com\/?p=23325"},"modified":"2024-04-10T12:10:06","modified_gmt":"2024-04-10T09:10:06","slug":"precipitation-hardening-explained","status":"publish","type":"post","link":"https:\/\/fractory.com\/precipitation-hardening-explained\/","title":{"rendered":"Precipitation Hardening &#8211; How It Works, Benefits &#038; More"},"content":{"rendered":"<p data-pm-slice=\"1 1 []\"><span data-color=\"transparent\">Precipitation hardening, also known as particle hardening or age hardening, is a <a href=\"https:\/\/fractory.com\/heat-treatment-methods\/\">heat treatment<\/a> method used to increase the yield strength of many different metals, including most structural alloys.<\/span><\/p>\n<p><span data-color=\"transparent\">The process was originally discovered by Alfred Wilm, who aimed to strengthen aluminium alloys. He decided to try to apply the quenching method used for carbon steels to aluminium alloys. The process of age hardening aluminium was patented by him in 1906. His research also led to the discovery of the earliest types of age-hardenable aluminium\u2013copper alloy, Duraluminium.<\/span><\/p>\n<p><span data-color=\"transparent\">Since then, age hardening has also been adopted for carbon steels and other metal alloys to enhance their strength, hardness, corrosion resistance and other <a href=\"https:\/\/fractory.com\/mechanical-properties-of-materials\/\">mechanical properties.<\/a><\/span><\/p>\n    <div class=\"shortcode-key-takeaways\">\n        <span class=\"v2-section-title v2-section-title--md\">Key Takeaways<\/span>\n        <ul class=\"shortcode-key-takeaways-list\">\n                                                <li>Precipitation hardening is a widely used heat treatment process that <strong>increases the strength and hardness<\/strong> of various alloy families.<\/li>\n                                                                <li>Age hardening works by precipitating specific microstructures of certain compounds that hold the lattice together and <strong>prevent dislocational movements<\/strong>. This, in effect, prevents cracks from spreading.<\/li>\n                                                                <li>The precipitation hardening process <strong>can improve oxidation and corrosion resistance<\/strong> in some alloys.<\/li>\n                                                                                                                                                                                                                                        <\/ul>\n    <\/div>\n    \n<h2 data-pm-slice=\"1 1 []\"><span data-color=\"transparent\">What Is Precipitation Hardening?<\/span><\/h2>\n<p><span data-color=\"transparent\">Precipitation hardening is a type of heat treatment process used to increase the yield and tensile strength of metal alloys. in which material hardness improves as a function of time.\u00a0<\/span><\/p>\n<p><span data-color=\"transparent\">The process uses dissolved impurities to improve the mechanical properties of a material. It works by separating specific constituents that bind the mixture together and inhibit relative motion.<\/span><\/p>\n<p><span data-color=\"transparent\">The mechanism is somewhat similar to steel-reinforced concrete. Adding steel bars to a concrete mixture enhances the <a href=\"https:\/\/fractory.com\/ultimate-tensile-strength\/\">tensile strength<\/a> of the concrete. When the concrete column encounters a tensile load, the steel beams restrict the expansion of the concrete by absorbing the tensile stress. The impurities in the precipitation hardening process improve the overall strength of the alloy similarly.<\/span><\/p>\n<p><span data-color=\"transparent\">Age hardening can lead to a significant improvement in the yield strength and hardness of alloys. For instance, the yield strength of 0.3% carbon steel when <a href=\"https:\/\/fractory.com\/annealing-explained\/\">annealed<\/a> is around 300 MPa. The same steel, when work-hardened, has a yield strength of around 600 MPa. When it is precipitation hardened, the yield strength increases to 1500 MPa. Thus, precipitation hardening provides a fivefold increase in the yield strength in this case.\u00a0<\/span><\/p>\n<h3>What Is the Difference Between Tempering and Precipitation Hardening?<\/h3>\n<p>Both processes sound really similar in terms of heating the alloy to a certain range, holding it there, followed by rapid cooling, and then heating again below the critical temperature. However, <a href=\"https:\/\/fractory.com\/tempering-explained\/\">tempering<\/a> and ageing are thermodynamically really different, performed on different types of metals and result in different properties depending on the time and temperature they\u2019re performed at.<\/p>\n<p>In terms of the effects on the mechanical properties, <strong>tempering increases toughness and ductility and slightly decreases hardness<\/strong> of the material. On the other hand, <strong>ageing increases the hardness and strength<\/strong>, making the metal somewhat brittle.<\/p>\n<p>Precipitation hardening hardens by forming a fine precipitate phase in the matrix of an alloy. The precipitates increase hardness by blocking dislocations in the crystal lattice. Tempering is actually stretching out the lattice because you have a Body Centered Tetragonal (BCT) lattice that is diffusing out carbon to reduce the internal stresses.<\/p>\n<p>Ageing is generally performed at lower temperatures than tempering and takes longer to achieve the desired effects. Typically, precipitation hardening is a process performed mainly on aluminium, nickel alloys and stainless steels, while <strong>tempering is specific to alloy steels<\/strong> because it is dependent on the <strong>formation of the martensite phase<\/strong>.<\/p>\n<h3><span data-color=\"transparent\">Applications for Age Hardening<\/span><\/h3>\n<p><span data-color=\"transparent\">Age-hardened alloys are used in a wide range of applications. They are ideal for applications that require rigid materials that do not flex under stress.<\/span><\/p>\n<p><span data-color=\"transparent\">Thus, you&#8217;ll find that components, such as valves, <a href=\"https:\/\/fractory.com\/types-of-gears\/\">gears<\/a>, shafts, engine parts, turbine blades, <a href=\"https:\/\/fractory.com\/types-of-bearings\/\">ball bearings<\/a>, bushes, dies and <a href=\"https:\/\/fractory.com\/types-of-fasteners\/\">fasteners<\/a> are precipitation-hardened. The age-hardening process improves most structural aluminium alloys (2xxx, 6xxx and 7xxx series), magnesium, nickel and titanium. The process also finds use with <a href=\"https:\/\/fractory.com\/what-is-mild-steel\/\">mild steel<\/a>, <a href=\"https:\/\/fractory.com\/what-is-stainless-steel\/\">stainless steel<\/a> and duplex stainless steel. <\/span><\/p>\n<p><span data-color=\"transparent\">Here are a few examples from various industries that rely on precipitation-hardened alloys:<\/span><\/p>\n<h4><span data-color=\"transparent\">Aerospace and automotive<\/span><\/h4>\n<p><span data-color=\"transparent\">Both the aerospace and automotive industries use age-hardened aluminium alloys as the parts need to be light and strong. Age-hardening further improves the excellent strength-to-weight ratio of aluminium. Aircraft parts, such as wings and fuselages, as well as automobile parts like engine blocks, cam covers and other critical engine components, utilise precipitation-hardened <a href=\"https:\/\/fractory.com\/aluminium-grades\/\">aluminium alloys<\/a>.<\/span><\/p>\n<h4><span data-color=\"transparent\">Telecommunications<\/span><\/h4>\n<p><span data-color=\"transparent\">Copper beryllium hardens copper in the compound. The copper starts behaving like a spring within the material. Age-hardened copper-based compounds are used in electrical contacts and switchgear, mainly because of their high conductivity.<\/span><\/p>\n<h4><span data-color=\"transparent\">Mining &amp; power generation<\/span><\/h4>\n<p><span data-color=\"transparent\">Age-hardened materials with copper-based compounds are used in mining tools since they have very high hardness and do not spark. When underground, preventing sparks is critical for safety.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span data-color=\"transparent\">Apart from the aforementioned sectors, precipitation-hardening alloys are used in many more types of products, such as bicycle frames, rifles, stamping tools and pressure vessels.\u00a0<\/span><\/p>\n    <div class=\"shortcode-enhanced-cta\">\n        <div class=\"shortcode-enhanced-cta__content\">\n            <span class=\"v2-section-title v2-section-title--md\">Scale Your Manufacturing from Prototyping to Series<\/span>\n\n            <ul class=\"shortcode-enhanced-cta-list\">\n                                                            <li>\n                                                            <div class=\"shortcode-icon\">\n                                    <svg width=\"100%\" height=\"100%\" viewBox=\"0 0 33 32\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n<path d=\"M16.4933 23.3059C21.7413 23.3059 25.9956 19.0515 25.9956 13.8036C25.9956 8.55559 21.7413 4.30127 16.4933 4.30127C11.2453 4.30127 6.991 8.55559 6.991 13.8036C6.991 19.0515 11.2453 23.3059 16.4933 23.3059Z\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n<path d=\"M1.16917 30.3724C1.35654 28.4452 2.49414 26.7455 4.20723 25.8488L11.5682 21.9542\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n<path d=\"M21.4318 21.9542L28.7928 25.8488C30.5058 26.7588 31.6434 28.4586 31.8308 30.3724\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n<path d=\"M12.8798 18.7956H6.10769C4.24738 18.7956 2.74843 17.2967 2.74843 15.4364V12.2243\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n<path d=\"M8.28921 9.02567H3.97971C3.29715 9.02567 2.74843 9.57439 2.74843 10.2569V14.2185C2.74843 14.901 3.29715 15.4498 3.97971 15.4498H7.13822\" stroke=\"currentColor\" 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1.07587 16.4933 1.07587C21.8199 1.07587 26.29 4.27453 28.2173 8.85169\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n<\/svg>\n                                <\/div>\n                            \n                                                            <span>Personal account manager<\/span>\n                                                    <\/li>\n                                                                                <li>\n                                                            <div class=\"shortcode-icon\">\n                                    <svg width=\"100%\" height=\"100%\" viewBox=\"0 0 33 34\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n<path d=\"M17.5835 26.6203C16.8491 26.0906 15.4887 26.1628 14.959 25.4284C14.4293 24.694 14.9229 23.4299 14.6339 22.5631C14.345 21.6963 13.2133 20.986 13.2133 20.059C13.2133 19.1319 14.3691 18.3976 14.6339 17.5548C14.8988 16.7121 14.4293 15.4119 14.959 14.6895C15.4887 13.9672 16.8491 14.0274 17.5835 13.4976C18.3179 12.9679 18.655 11.6436 19.5218 11.3667C20.3886 11.0898 21.412 11.9566 22.351 11.9566C23.2901 11.9566 24.3375 11.1019 25.1802 11.3667C26.0229 11.6316 26.3962 12.9679 27.1185 13.4976C27.8409 14.0274 29.2133 13.9551 29.743 14.6895C30.2728 15.4239 29.7792 16.688 30.0681 17.5548C30.357 18.4216 31.4887 19.1319 31.4887 20.059C31.4887 20.986 30.333 21.7204 30.0681 22.5631C29.8032 23.4058 30.2728 24.7061 29.743 25.4284C29.2133 26.1508 27.8529 26.0906 27.1185 26.6203C26.3841 27.15 26.047 28.4743 25.1802 28.7512C24.3134 29.0281 23.2901 28.1613 22.351 28.1613C21.412 28.1613 20.3646 29.0161 19.5218 28.7512C18.6791 28.4864 18.3059 27.15 17.5835 26.6203Z\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n<path d=\"M22.351 25.5729C25.3963 25.5729 27.8649 23.1042 27.8649 20.059C27.8649 17.0137 25.3963 14.545 22.351 14.545C19.3058 14.545 16.8371 17.0137 16.8371 20.059C16.8371 23.1042 19.3058 25.5729 22.351 25.5729Z\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n<path d=\"M17.6919 26.7046L15.3322 30.0755C15.1396 30.3524 15.3322 30.7377 15.6693 30.7617L17.7521 30.8821C17.8484 30.8821 17.9447 30.9303 18.0169 30.9905L19.1847 32.0138C19.4375 32.2305 19.8348 32.0981 19.895 31.773L20.5451 28.679\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n<path d=\"M26.9981 26.7046L29.3698 30.0876C29.5625 30.3645 29.3698 30.7497 29.0448 30.7738L26.8055 30.9303C26.7092 30.9303 26.6129 30.9785 26.5406 31.0507L25.5294 31.9897C25.2765 32.2185 24.8792 32.0861 24.807 31.761L24.1569 28.691\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n<path d=\"M14.7062 24.7181H3.91912C2.59481 24.7181 1.51129 23.6466 1.51129 22.3103V3.73391C1.51129 2.4096 2.58277 1.32608 3.91912 1.32608H22.5075C23.8318 1.32608 24.9154 2.39756 24.9154 3.73391V11.3186\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n<path d=\"M15.4646 1.32608H10.9379V9.81366H15.4646V1.32608Z\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n<\/svg>\n                                <\/div>\n                            \n                                                            <span>Quality assurance<\/span>\n                                                    <\/li>\n                                                                                <li>\n                                                            <div class=\"shortcode-icon\">\n                                    <svg width=\"100%\" height=\"100%\" viewBox=\"0 0 35 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n<path d=\"M17.576 22.1218H4.47786C3.039 22.1218 1.87455 20.7126 1.87455 18.9994V4.93701C1.87455 3.20888 3.039 1.81451 4.47786 1.81451H26.1796C27.6184 1.81451 28.7829 3.20888 28.7829 4.93701V9.53916\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n<path d=\"M1.87084 5.5081H28.7866\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n<path d=\"M1.87084 11.2636H18.0618\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n<path d=\"M6.22453 17.019H10.4299\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n<path d=\"M24.5182 25.63C29.2739 25.63 33.1292 21.7747 33.1292 17.019C33.1292 12.2633 29.2739 8.40808 24.5182 8.40808C19.7625 8.40808 15.9072 12.2633 15.9072 17.019C15.9072 21.7747 19.7625 25.63 24.5182 25.63Z\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n<path d=\"M24.5182 11.0967V17.019L27.7519 20.2528\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n<\/svg>\n     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stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n<\/g>\n<\/svg>\n                                <\/div>\n                            \n                                                            <span>On-time delivery by Fractory<\/span>\n                                                    <\/li>\n                                                                                    <\/ul>\n\n            <a class=\"c-button c-button--sm\" href=\"https:\/\/app.fractory.com\/quotes\/new?lng=en\">Get a quote<\/a>\n        <\/div>\n\n        <div class=\"shortcode-enhanced-cta__media\">\n                            <video class=\"shortcode-video\" autoplay loop muted playsinline>\n                    <source src=\"https:\/\/fractory.com\/wp-content\/uploads\/2023\/01\/homepage-vid-v2.mp4\" type=\"video\/mp4\">\n                <\/video>\n                    <\/div>\n    <\/div>\n    \n<h2><strong><span data-color=\"transparent\">How Does the Precipitation Hardening Process Work?<\/span><\/strong><\/h2>\n<p><span data-color=\"transparent\">A typical precipitation hardening process consists of three stages: solution treatment, quenching, and ageing.<\/span><\/p>\n<h3><strong><span data-color=\"transparent\">1. Solution Treatment<\/span><\/strong><\/h3>\n<p><span data-color=\"transparent\">The solution heat treatment phase, or solutionising phase, is where the homogeneity of the solid mixture is improved with the constituent metal. This could be beryllium in copper or copper in aluminium.<\/span><\/p>\n<p><span data-color=\"transparent\">The solution is heated above the solvus temperature to ensure maximum dissolution of the precipitate in the alloy. The mixture sits at this temperature for a specific duration. This stage is therefore also known as soaking.<\/span><\/p>\n<p><span data-color=\"transparent\">Let&#8217;s try to understand what exactly happens in this stage: Imagine you want to dissolve sugar in water. Increasing the temperature of the water enables to dissolve more sugar. On the other hand, if you decrease the water temperature, some of that sugar which was previously dissolved might come out of the solution.<\/span><\/p>\n<p><span data-color=\"transparent\">The solvus temperature is the maximum temperature at which you can dissolve the most amount of a solid in a solution. Thus, by holding the alloy at a temperature above the solvus temperature, we can ensure that the maximum amount of solute is uniformly dissolved into the solid solution. This solution is also known as a <\/span><strong><span data-color=\"transparent\">supersaturated solid solution<\/span><\/strong><span data-color=\"transparent\">.<\/span><\/p>\n<h3><strong><span data-color=\"transparent\">2. Quenching<\/span><\/strong><\/h3>\n<p><span data-color=\"transparent\">Once maximum dissolution of the impurity occurs, the alloy is rapidly cooled to room temperature. This step is known as <a href=\"https:\/\/fractory.com\/quenching-explained\/\">quenching<\/a>. Quenching enables to trap the supersaturated solution as a metastable phase.<\/span><\/p>\n<p><span data-color=\"transparent\">A metastable phase is an intermediate energy state that should not exist at lower temperatures. However, by rapidly cooling the material, we can freeze the phase at lower temperatures.<\/span><\/p>\n<p><span data-color=\"transparent\">Quenching achieves this by preventing the diffusion of nucleation sites. Rapid cooling prevents the solute from precipitating out of the solution, which would typically occur during slow cooling processes. Materials that are just quenched, are soft solid solutions with low strength.<\/span><\/p>\n<h3><strong><span data-color=\"transparent\">3. Ageing<\/span><\/strong><\/h3>\n<p><span data-color=\"transparent\">In the ageing stage, the solution is <strong>heated again<\/strong>. However, the <strong>temperature is lower than in the solution treatment phase<\/strong> and does not reach the solvus temperature. The elevated temperature initiates precipitate formation but within very short ranges. Fine precipitates develop in the solution. These precipitates form massive strain fields and enhance the strength and hardness of the final product.<\/span><\/p>\n<p><strong>Ageing can also occur at room temperature<\/strong> for some alloys. This is referred to as <strong>natural ageing<\/strong> while ageing above room temperature is referred to as <strong>artificial ageing<\/strong>.<\/p>\n<p><span data-color=\"transparent\">We must remember that ageing is a function of time. As time passes, the hardness of the material increases and reaches a peak value. At that stage, the material is optimally aged and exhibits the highest strength. This is because an optimally aged material interferes the most with atomic motion.<\/span><\/p>\n<p><span data-color=\"transparent\">If you heat the material further, it passes the peak strength point and the strength starts to decrease again. This is known as overageing. Overaged materials are not as hard as optimally aged materials.<\/span><\/p>\n<h2><strong><span data-color=\"transparent\">Age Hardening Benefits<\/span><\/strong><\/h2>\n<p><span data-color=\"transparent\">Age hardening provides the following benefits:<\/span><\/p>\n<ul>\n<li>\n<p><strong><span data-color=\"transparent\">Improved strength<\/span><\/strong><span data-color=\"transparent\"> &#8211; For many materials, the strength can be increased up to four-five times. This provides many benefits, such as smaller parts, lower costs, <a href=\"https:\/\/fractory.com\/topology-optimisation\/\">reduced weight<\/a> and safer operation.<\/span><\/p>\n<\/li>\n<li>\n<p><strong><span data-color=\"transparent\">Improved hardness<\/span><\/strong><span data-color=\"transparent\"> &#8211; Particle hardening makes metals more durable as they won&#8217;t <a href=\"https:\/\/fractory.com\/mechanical-corrosive-adhesive-material-wear\/\">wear out<\/a> as easily.<\/span><\/p>\n<\/li>\n<li>\n<p><strong><span data-color=\"transparent\">Improved corrosion resistance<\/span><\/strong><span data-color=\"transparent\"> &#8211; Depending on the alloy, age hardening can enhance the <a href=\"https:\/\/fractory.com\/types-of-corrosion\/\">corrosion<\/a> resistance. This is particularly desirable in components that are frequently exposed to corrosive compounds, such as chemicals and seawater.<\/span><\/p>\n<\/li>\n<li>\n<p><strong><span data-color=\"transparent\">Improved ductility<\/span><\/strong><span data-color=\"transparent\"> &#8211; Precipitation hardening can also improve a product\u2019s ductility. This enhances resilience and prevents cracking and breakage.<\/span><\/p>\n<\/li>\n<\/ul>\n<h2><span data-color=\"transparent\">Conclusion<\/span><\/h2>\n<p><span data-color=\"transparent\">Precipitation hardening is a widely used process to improve the strength rating of many <a href=\"https:\/\/fractory.com\/types-of-metal\/\">types of metals<\/a> and alloys. However, there are two main limitations: cost and the potential for distortion. The process is costlier than many other heat treatment methods as it requires additional heating after quenching. This may take a few hours up to several days in some cases. Material distortion is a risk with certain alloys in the quenching phase.<\/span><\/p>\n<p><span data-color=\"transparent\">However, the unique benefits precipitation hardening offers make it a compelling choice. The process guarantees a harder and stronger metal when carried out properly which is especially useful for soft metals like aluminium.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Precipitation hardening, also known as particle hardening or age hardening, is a heat treatment method used to increase the yield strength of many different metals, including most structural alloys. The [&hellip;]<\/p>\n","protected":false},"author":29,"featured_media":23328,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[6490],"tags":[],"yst_prominent_words":[130,952,998,1318,1335,1336,1371,1489,3567,3656,3682,3713],"class_list":["post-23325","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fabrication-methods"],"acf":[],"_links":{"self":[{"href":"https:\/\/fractory.com\/wp-json\/wp\/v2\/posts\/23325","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fractory.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fractory.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fractory.com\/wp-json\/wp\/v2\/users\/29"}],"replies":[{"embeddable":true,"href":"https:\/\/fractory.com\/wp-json\/wp\/v2\/comments?post=23325"}],"version-history":[{"count":2,"href":"https:\/\/fractory.com\/wp-json\/wp\/v2\/posts\/23325\/revisions"}],"predecessor-version":[{"id":23335,"href":"https:\/\/fractory.com\/wp-json\/wp\/v2\/posts\/23325\/revisions\/23335"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/fractory.com\/wp-json\/wp\/v2\/media\/23328"}],"wp:attachment":[{"href":"https:\/\/fractory.com\/wp-json\/wp\/v2\/media?parent=23325"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fractory.com\/wp-json\/wp\/v2\/categories?post=23325"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fractory.com\/wp-json\/wp\/v2\/tags?post=23325"},{"taxonomy":"yst_prominent_words","embeddable":true,"href":"https:\/\/fractory.com\/wp-json\/wp\/v2\/yst_prominent_words?post=23325"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}