Long-term thermal exposure responses of the microstructure and properties of a cast Ni-base superalloy

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	Long-term thermal exposure responses of the microstructure and properties of a cast Ni-base superalloy
	X. Z. Qin; J. T. Guo; C. Yuan; J. S. Hou; L. Z. Zhou; H. Q. Ye
	2012
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	543 页码:121-128
摘要	Microstructural evolution and microstructure-property relationship during long-term thermal exposure in K446 alloy are investigated in detail. The coarsening rate of gamma' precipitates increases with the rise of exposure temperature, yet decreases with the increment of exposure time. Primary MC carbides present an excellent stability and decompose to a tiny degree by two reaction forms, which have an insignificant influence on the properties. TCP-mu phase precipitates from the supersaturated matrix in the forms of needles and granules and experiences a remarkable evolution with prolonged exposure; the mu. phase near the grain boundaries (GBs) evolves slower than that within the grains due to the inhomogeneous distribution of elements. In addition, the precipitation of mu phase is determined to be more detrimental to the mechanical properties than the gamma' coarsening in the present alloy. (C) 2012 Elsevier B.V. All rights reserved.
部门归属	[qin, x. z.; guo, j. t.; yuan, c.; hou, j. s.; zhou, l. z.; ye, h. q.] chinese acad sci, inst met res, shenyang 110016, peoples r china.;zhou, lz (reprint author), chinese acad sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china.;lzz@imr.ac.cn
关键词	Ni-base Superalloy Thermal Exposure Microstructural Evolution Tcp-mu Phase Mechanical Property Primary Mc Carbide Mechanical-properties Creep-properties Phase-formation Behavior Precipitation Decomposition Stability Rupture Stress
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60195
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. Z. Qin,J. T. Guo,C. Yuan,et al. Long-term thermal exposure responses of the microstructure and properties of a cast Ni-base superalloy[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2012,543:121-128.
APA	X. Z. Qin,J. T. Guo,C. Yuan,J. S. Hou,L. Z. Zhou,&H. Q. Ye.(2012).Long-term thermal exposure responses of the microstructure and properties of a cast Ni-base superalloy.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,543,121-128.
MLA	X. Z. Qin,et al."Long-term thermal exposure responses of the microstructure and properties of a cast Ni-base superalloy".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 543(2012):121-128.