Preparation of hot-isostatic-pressed powder metallurgy superalloy Inconel 718 free of prior particle boundaries

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• 作者：Litao Chang¹ ; Wenru Sun ; Yuyou Cui ; Rui Yang ; ^{ryang@imr.ac.cn}
• 关键词：Superalloy ; Powder metallurgy ; Hot isostatic pressing ; Prior particle boundary ; Inconel 718
• 刊名：Materials Science and Engineering: A
• 出版年：2017
• 出版时间：13 January 2017
• 年：2017
• 卷：682
• 期：Complete
• 页码：341-344
• 全文大小：1839 K
• 卷排序：682

文摘

A new hot-isostatic-pressing (HIPing) scheme, which consists of a short time holding above the solidus and a long time annealing below the incipient temperature of Laves phase, has been proposed for Inconel 718 powder to avoid the formation of prior particle boundaries (PPBs). The powder metallurgy Inconel 718 compacted with the above HIPing scheme is free of PPBs, features transgranular ductile fracture mode during tensile tests, and possesses a stress rupture life that is much longer than that of the wrought alloy.