{"id":8477,"date":"2018-11-20T15:41:04","date_gmt":"2018-11-20T15:41:04","guid":{"rendered":"https:\/\/staging.asminternational.org\/hts-new\/results\/-\/journal_content\/56\/10192\/35838398\/NEWS\/"},"modified":"2023-02-07T04:48:53","modified_gmt":"2023-02-07T04:48:53","slug":"one-minute-mentor-variations-in-cooling-rate","status":"publish","type":"post","link":"https:\/\/www.asminternational.org\/hts\/one-minute-mentor-variations-in-cooling-rate\/","title":{"rendered":"One Minute Mentor: Variations in Cooling Rate"},"content":{"rendered":"<p><span style=\"font-size:12.0pt\"><span style=\"line-height:107%\">Variations in cooling rate, from point to point, can exaggerate the production of residual stresses because, in some instances, it is possible for austenite transformation products to be different in sections with different cooling rates. For example, in rapidly cooled sections in moderately alloyed irons, it is possible for the austenite to transform to martensite, a very hard and brittle microconstituent that expands a different amount than the normal pearlitic or bainitic constituent when it forms from austenite.<\/span><\/span><\/p>\n<p><span style=\"font-size:12.0pt\"><span style=\"line-height:107%\">This difference in expansion rates between differing transformation products adds to differences in contraction rates due to differences in section sizes. Typical cast shapes that could be expected to have different cooling rates from point to point are illustrated in the diagram.<\/span><\/span><\/p>\n<p><span style=\"font-size:12.0pt\"><span style=\"line-height:107%\">The diagram shows four cast shapes and corresponding causes of residual stresses in castings. <\/span><\/span><\/p>\n<p><span style=\"font-size:12.0pt\"><span style=\"line-height:107%\">(a) Differences in cooling rates due to shape. <\/span><\/span><\/p>\n<p><span style=\"font-size:12.0pt\"><span style=\"line-height:107%\">(b) Nonuniform metal sections. <\/span><\/span><\/p>\n<p><span style=\"font-size:12.0pt\"><span style=\"line-height:107%\">(c) Mechanical mold restraint. <\/span><\/span><\/p>\n<p><span style=\"font-size:12.0pt\"><span style=\"line-height:107%\">(d) Surface peening during cleaning. Diagram courtesy of the American Foundry Society<\/span><\/span><\/p>\n<p><span style=\"font-size:12.0pt\"><span style=\"line-height:107%\"><a href=\"https:\/\/matdata-s.asminternational.org\/hbk\/do\/section\/content\/V04D\/D00\/A01\/index.htm\" target=\"page\" title=\"Volume 4D, Heat Treating of Irons and Steels\" rel=\"noopener\">Volume 4D, Heat Treating of Irons and Steels<\/a> -&gt; Heat Treatment of Cast Irons -&gt; <a href=\"https:\/\/matdata-s.asminternational.org\/hbk\/do\/section\/content\/V04D\/D05\/A01\/index.htm\" target=\"page\" title=\"Introduction to Cast Iron Heat Treatment\" rel=\"noopener\">Introduction to Cast Iron Heat Treatment<\/a> -&gt; Heat Treatment Processes<\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Variations in cooling rate, from point to point, can exaggerate the production of residual stresses because, in some instances, it is possible for austenite transformation products to be different in sections with different cooling rates.<\/p>\n","protected":false},"author":63082,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[440,441,1],"tags":[],"class_list":["post-8477","post","type-post","status-publish","format-standard","hentry","category-news","category-news-articles","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>One Minute Mentor: Variations in Cooling Rate - Heat Treating Society<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/35838398\/NEWS\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"One Minute Mentor: Variations in Cooling Rate - Heat Treating Society\" \/>\n<meta property=\"og:description\" content=\"Variations in cooling rate, from point to point, can exaggerate the production of residual stresses because, in some instances, it is possible for austenite transformation products to be different in sections with different cooling rates.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/35838398\/NEWS\/\" \/>\n<meta property=\"og:site_name\" content=\"Heat Treating Society\" \/>\n<meta property=\"article:published_time\" content=\"2018-11-20T15:41:04+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-02-07T04:48:53+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/results\\\/-\\\/journal_content\\\/56\\\/10192\\\/35838398\\\/NEWS\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/results\\\/-\\\/journal_content\\\/56\\\/10192\\\/35838398\\\/NEWS\\\/\"},\"author\":{\"name\":\"\",\"@id\":\"\"},\"headline\":\"One Minute Mentor: Variations in Cooling Rate\",\"datePublished\":\"2018-11-20T15:41:04+00:00\",\"dateModified\":\"2023-02-07T04:48:53+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/results\\\/-\\\/journal_content\\\/56\\\/10192\\\/35838398\\\/NEWS\\\/\"},\"wordCount\":197,\"publisher\":{\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/#organization\"},\"articleSection\":[\"news\",\"News Articles\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/results\\\/-\\\/journal_content\\\/56\\\/10192\\\/35838398\\\/NEWS\\\/\",\"url\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/results\\\/-\\\/journal_content\\\/56\\\/10192\\\/35838398\\\/NEWS\\\/\",\"name\":\"One Minute Mentor: Variations in Cooling Rate - Heat Treating Society\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/#website\"},\"datePublished\":\"2018-11-20T15:41:04+00:00\",\"dateModified\":\"2023-02-07T04:48:53+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/results\\\/-\\\/journal_content\\\/56\\\/10192\\\/35838398\\\/NEWS\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/results\\\/-\\\/journal_content\\\/56\\\/10192\\\/35838398\\\/NEWS\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/results\\\/-\\\/journal_content\\\/56\\\/10192\\\/35838398\\\/NEWS\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"One Minute Mentor: Variations in Cooling Rate\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/#website\",\"url\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/\",\"name\":\"Heat Treating Society\",\"description\":\"Heat Treating Society ASM International\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/#organization\",\"name\":\"Heat Treating Society\",\"url\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/cdn-prd-main.asm-media.cloud\\\/uploads\\\/sites\\\/85\\\/2022\\\/06\\\/layout_set_logo.png\",\"contentUrl\":\"https:\\\/\\\/cdn-prd-main.asm-media.cloud\\\/uploads\\\/sites\\\/85\\\/2022\\\/06\\\/layout_set_logo.png\",\"width\":286,\"height\":95,\"caption\":\"Heat Treating Society\"},\"image\":{\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"One Minute Mentor: Variations in Cooling Rate - Heat Treating Society","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/35838398\/NEWS\/","og_locale":"en_US","og_type":"article","og_title":"One Minute Mentor: Variations in Cooling Rate - Heat Treating Society","og_description":"Variations in cooling rate, from point to point, can exaggerate the production of residual stresses because, in some instances, it is possible for austenite transformation products to be different in sections with different cooling rates.","og_url":"https:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/35838398\/NEWS\/","og_site_name":"Heat Treating Society","article_published_time":"2018-11-20T15:41:04+00:00","article_modified_time":"2023-02-07T04:48:53+00:00","twitter_card":"summary_large_image","twitter_misc":{"Written by":"","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/35838398\/NEWS\/#article","isPartOf":{"@id":"https:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/35838398\/NEWS\/"},"author":{"name":"","@id":""},"headline":"One Minute Mentor: Variations in Cooling Rate","datePublished":"2018-11-20T15:41:04+00:00","dateModified":"2023-02-07T04:48:53+00:00","mainEntityOfPage":{"@id":"https:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/35838398\/NEWS\/"},"wordCount":197,"publisher":{"@id":"https:\/\/www.asminternational.org\/hts\/#organization"},"articleSection":["news","News Articles"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/35838398\/NEWS\/","url":"https:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/35838398\/NEWS\/","name":"One Minute Mentor: Variations in Cooling Rate - Heat Treating Society","isPartOf":{"@id":"https:\/\/www.asminternational.org\/hts\/#website"},"datePublished":"2018-11-20T15:41:04+00:00","dateModified":"2023-02-07T04:48:53+00:00","breadcrumb":{"@id":"https:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/35838398\/NEWS\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/35838398\/NEWS\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/35838398\/NEWS\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.asminternational.org\/hts\/"},{"@type":"ListItem","position":2,"name":"One Minute Mentor: Variations in Cooling Rate"}]},{"@type":"WebSite","@id":"https:\/\/www.asminternational.org\/hts\/#website","url":"https:\/\/www.asminternational.org\/hts\/","name":"Heat Treating Society","description":"Heat Treating Society ASM International","publisher":{"@id":"https:\/\/www.asminternational.org\/hts\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.asminternational.org\/hts\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.asminternational.org\/hts\/#organization","name":"Heat Treating Society","url":"https:\/\/www.asminternational.org\/hts\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.asminternational.org\/hts\/#\/schema\/logo\/image\/","url":"https:\/\/cdn-prd-main.asm-media.cloud\/uploads\/sites\/85\/2022\/06\/layout_set_logo.png","contentUrl":"https:\/\/cdn-prd-main.asm-media.cloud\/uploads\/sites\/85\/2022\/06\/layout_set_logo.png","width":286,"height":95,"caption":"Heat Treating Society"},"image":{"@id":"https:\/\/www.asminternational.org\/hts\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":""}]}},"acf":[],"_links":{"self":[{"href":"https:\/\/www.asminternational.org\/hts\/wp-json\/wp\/v2\/posts\/8477","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.asminternational.org\/hts\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.asminternational.org\/hts\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.asminternational.org\/hts\/wp-json\/wp\/v2\/users\/63082"}],"replies":[{"embeddable":true,"href":"https:\/\/www.asminternational.org\/hts\/wp-json\/wp\/v2\/comments?post=8477"}],"version-history":[{"count":0,"href":"https:\/\/www.asminternational.org\/hts\/wp-json\/wp\/v2\/posts\/8477\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.asminternational.org\/hts\/wp-json\/wp\/v2\/media?parent=8477"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.asminternational.org\/hts\/wp-json\/wp\/v2\/categories?post=8477"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.asminternational.org\/hts\/wp-json\/wp\/v2\/tags?post=8477"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}