{"id":4074,"date":"2023-07-19T02:35:50","date_gmt":"2023-07-19T07:35:50","guid":{"rendered":"https:\/\/cqfa.quebec\/?p=4074"},"modified":"2023-07-19T02:43:48","modified_gmt":"2023-07-19T07:43:48","slug":"effect-of-heat-treatment-on-the-microstructure-and-mechanical-properties-of-18ni-300-maraging-steel-produced-by-additive-subtractive-hybrid-manufacturing","status":"publish","type":"post","link":"https:\/\/cqfa.quebec\/en\/effect-of-heat-treatment-on-the-microstructure-and-mechanical-properties-of-18ni-300-maraging-steel-produced-by-additive-subtractive-hybrid-manufacturing\/","title":{"rendered":"Effect of Heat Treatment on the Microstructure and Mechanical Properties of 18Ni-300 Maraging Steel Produced by Additive\u2013Subtractive Hybrid Manufacturing"},"content":{"rendered":"<p><em>Osman, M.; Sarafan, S.; Wanjara, P.; Bernier, F.; Atabay, S.E.; Gholipour, J.; Molavi-Zarandi, M.; Soost, J.; Brochu, M. (2023). Effect of Heat Treatment on the Microstructure and Mechanical Properties of 18Ni-300 Maraging Steel Produced by Additive\u2013Subtractive Hybrid Manufacturing. Materials, 2023,\u00a016(13), 4749.<\/em><\/p>\n<p>&nbsp;<\/p>\n<p>The present work investigates the effectiveness of two heat treatment cycles\u2014solution treatment + aging (STA) and direct aging (DA)\u2014on optimizing the microstructure and enhancing the mechanical properties of 18Ni-300 maraging steel (300 MS) produced by additive\u2013subtractive hybrid manufacturing (ASHM). The STA treatment led to a fully martensitic microstructure with minor remnants of the cellular substructures associated with the solidification conditions in ASHM. DA resulted in some reverted austenite and partial dissolution of the cellular morphologies into shorter fragments. Despite the contrasting microstructures, the tensile strength and the macro- and micro-hardness were comparable between STA and DA conditions. By contrast, the potential for improving the ductility was higher with the DA heat treatment. This is attributed to the higher reverted austenite content in the samples treated by DA, i.e., up to a maximum of 13.4% compared to less than 3.0% in the STA samples. For the DA sample with the highest reverted austenite content of 13.4%, the highest local and global fracture strain values of 30.1 and 5.9 \u00b1 0.6% were measured, while the respective values were 23.4 and 4.4 \u00b1 0.1% for the corresponding STA sample. This work suggests that DA of 300 MS produced by ASHM is sufficient to achieve comparable hardness and tensile strength to STA, whilst maintaining reasonable ductility. Avoiding the solution treatment cycle, with its appreciably higher temperatures, could benefit the dimensional stability and surface quality that are important for ASHM of 300 MS parts.<\/p>\n<p>&nbsp;<\/p>\n<p class=\"link-btn-style btn-yellow\"><a href=\"https:\/\/www.mdpi.com\/1996-1944\/16\/13\/4749\" target=\"_blank\" rel=\"noopener\">Read the publication<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Osman, M.; Sarafan, S.; Wanjara, P.; Bernier, F.; Atabay, S.E.; Gholipour, J.; Molavi-Zarandi, M.; Soost, J.; Brochu, M. (2023). Effect of Heat Treatment on the Microstructure and Mechanical Properties of [&hellip;]<\/p>\n","protected":false},"author":80,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":""},"categories":[43],"tags":[],"class_list":["post-4074","post","type-post","status-publish","format-standard","hentry","category-publications-academiques-quebecoises"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Effect of Heat Treatment on the Microstructure and Mechanical Properties of 18Ni-300 Maraging Steel Produced by Additive\u2013Subtractive Hybrid Manufacturing - CQFA - Carrefour qu\u00e9b\u00e9cois de la fabrication additive<\/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:\/\/cqfa.quebec\/en\/effect-of-heat-treatment-on-the-microstructure-and-mechanical-properties-of-18ni-300-maraging-steel-produced-by-additive-subtractive-hybrid-manufacturing\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Effect of Heat Treatment on the Microstructure and Mechanical Properties of 18Ni-300 Maraging Steel Produced by Additive\u2013Subtractive Hybrid Manufacturing - CQFA - Carrefour qu\u00e9b\u00e9cois de la fabrication additive\" \/>\n<meta property=\"og:description\" content=\"Osman, M.; Sarafan, S.; Wanjara, P.; Bernier, F.; Atabay, S.E.; Gholipour, J.; Molavi-Zarandi, M.; Soost, J.; Brochu, M. 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