Influences of hot-isostatic-pressing temperature on microstructure, tensile properties and tensile fracture mode of Inconel 718 powder compact

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	Influences of hot-isostatic-pressing temperature on microstructure, tensile properties and tensile fracture mode of Inconel 718 powder compact
	L. T. Chang; W. R. Sun; Y. Y. Cui; R. Yang
	2014
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	599 页码:186-195
摘要	Inconel 718 powders have been hot-isostatic-pressed (HIPed) at representative temperatures to investigate the variations in microstructure, tensile properties and tensile fracture mode of the powder compact. Microstructure of the powder compacts were characterized by optical microscopy (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and so on. The results showed that the interdendritic precipitates inherited from the powders were partially retained in the powder compacts when the powders were HIPed at or below 1210 degrees C but were eliminated when HIPed at and above 1260 degrees C. The grain size uniformity of the powder compacts first increases and then decreases with increasing HIPing temperature. Prior particle boundaries (PPBs) were observed in the powder compacts HIPed at and below 1260 degrees C but was eliminated when HIPed at 1275 degrees C. The PPBs were decorated with carbide particles, the amount of the carbide particles at the PPBs decreases with increasing HIPing temperature. Most of the PPBs were pinned by the carbide particles in the compacts HIPed at 1140 degrees C. When the HIPing temperature was increased to 1210 degrees C and 1260 degrees C, a large number of PPBs de-pinned and moved beyond the pinning carbide particles, leading to grain growth and leaving carbide particles at the site of the original PPBs within the new grains. With increasing HIPing temperature, the 0.2% yield strength of the powder compacts at 650 degrees C decreases, the tensile elongation increases, and the tensile fracture mode changed from inter-particle dominant fracture to fully dimple ductile fracture. (c) 2014 Elsevier B.V. All rights reserved.
部门归属	[chang, litao ; sun, wenru ; cui, yuyou ; yang, rui] chinese acad sci, inst met res, shenyang 110016, peoples r china. [chang, litao] univ chinese acad sci, beijing, peoples r china. ; yang, r (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china. ; ryang@imr.ac.cn
关键词	Powder Metallurgy Superalloy Hot-isostatic-pressing Prior Particle Boundary Carbide Tensile Fracture Nickel-base Superalloy Mechanical-properties Heat-treatment Alloy Solidification Phosphorus Particles Parts Hip
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/72828
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. T. Chang,W. R. Sun,Y. Y. Cui,et al. Influences of hot-isostatic-pressing temperature on microstructure, tensile properties and tensile fracture mode of Inconel 718 powder compact[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2014,599:186-195.
APA	L. T. Chang,W. R. Sun,Y. Y. Cui,&R. Yang.(2014).Influences of hot-isostatic-pressing temperature on microstructure, tensile properties and tensile fracture mode of Inconel 718 powder compact.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,599,186-195.
MLA	L. T. Chang,et al."Influences of hot-isostatic-pressing temperature on microstructure, tensile properties and tensile fracture mode of Inconel 718 powder compact".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 599(2014):186-195.