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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
Source PublicationMETALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
ISSN1073-5623
Volume48AIssue:3Pages:1273-1287
AbstractA 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
description.department[chang, litao ; sun, wenru ; cui, yuyou ; yang, rui] chinese acad sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china
Subject AreaMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78271
Collection中国科学院金属研究所
Corresponding AuthorYang, R (reprint author), Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
Recommended Citation
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.
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