Microstructure, Tensile Properties, and Hot-Working Characteristics of a Hot Isostatic-Pressed Powder Metallurgy Superalloy

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	Microstructure, Tensile Properties, and Hot-Working Characteristics of a Hot Isostatic-Pressed Powder Metallurgy Superalloy
	Chang, Litao; Sun, Wenru; Cui, Yuyou; Yang, Rui; Yang, R (reprint author), Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
	2017-03-01
发表期刊	METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
ISSN	1073-5623
卷号	48A 期号:3 页码:1273-1287
摘要	A series of microstructure observation, tensile, and hot compression tests were conducted to investigate the variation of microstructure, tensile properties, and hot-working characteristics of a powder metallurgy (PM) superalloy with hot isostatic pressing (HIPing) temperature, to establish a basis for the parameter selection for PM superalloy preparation. The results show that the dendritic structure from the powder was not completely removed until the HIPing temperature is above the gamma' solvus; gamma/gamma' eutectic formed when the powder particles were HIPed at 1533 K (1260 A degrees C) or above. Prior particle boundaries (PPBs) were observed in alloys HIPed at 1513 K (1240 A degrees C) and below; the PPB decoration is serious in alloys HIPed at 1483 K and 1513 K (1210 A degrees C and 1240 A degrees C), owing to melting and aggregation of the boride phase at the particle boundaries during HIPing; the PPBs were eliminated when the HIPing was done at 1533 K (1260 A degrees C) or above. Tensile fracture mode of the alloy changes from inter-particle and transgranular mixed fracture to transgranular fracture with increasing HIPing temperature, which is in accordance with the change in precipitate distribution at the PPBs. The hot workability of alloy is poor for all combinations of HIPing/deformation conditions except for HIPing at sub-solvus temperature and deformation at low strain rates. (C) The Minerals, Metals & Materials Society and ASM International 2016; A series of microstructure observation, tensile, and hot compression tests were conducted to investigate the variation of microstructure, tensile properties, and hot-working characteristics of a powder metallurgy (PM) superalloy with hot isostatic pressing (HIPing) temperature, to establish a basis for the parameter selection for PM superalloy preparation. The results show that the dendritic structure from the powder was not completely removed until the HIPing temperature is above the gamma' solvus; gamma/gamma' eutectic formed when the powder particles were HIPed at 1533 K (1260 A degrees C) or above. Prior particle boundaries (PPBs) were observed in alloys HIPed at 1513 K (1240 A degrees C) and below; the PPB decoration is serious in alloys HIPed at 1483 K and 1513 K (1210 A degrees C and 1240 A degrees C), owing to melting and aggregation of the boride phase at the particle boundaries during HIPing; the PPBs were eliminated when the HIPing was done at 1533 K (1260 A degrees C) or above. Tensile fracture mode of the alloy changes from inter-particle and transgranular mixed fracture to transgranular fracture with increasing HIPing temperature, which is in accordance with the change in precipitate distribution at the PPBs. The hot workability of alloy is poor for all combinations of HIPing/deformation conditions except for HIPing at sub-solvus temperature and deformation at low strain rates. (C) The Minerals, Metals & Materials Society and ASM International 2016
部门归属	[chang, litao ; sun, wenru ; cui, yuyou ; yang, rui] chinese acad sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china
学科领域	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
收录类别	SCI
语种	英语
WOS记录号	WOS:000394214300030
引用统计	被引频次：16[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/78271
专题	中国科学院金属研究所
通讯作者	Yang, R (reprint author), Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
推荐引用方式 GB/T 7714	Chang, Litao,Sun, Wenru,Cui, Yuyou,et al. Microstructure, Tensile Properties, and Hot-Working Characteristics of a Hot Isostatic-Pressed Powder Metallurgy Superalloy[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,2017,48A(3):1273-1287.
APA	Chang, Litao,Sun, Wenru,Cui, Yuyou,Yang, Rui,&Yang, R .(2017).Microstructure, Tensile Properties, and Hot-Working Characteristics of a Hot Isostatic-Pressed Powder Metallurgy Superalloy.METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,48A(3),1273-1287.
MLA	Chang, Litao,et al."Microstructure, Tensile Properties, and Hot-Working Characteristics of a Hot Isostatic-Pressed Powder Metallurgy Superalloy".METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 48A.3(2017):1273-1287.