Decomposition of primary MC carbide and its effects on the fracture behaviors of a cast Ni-base superalloy

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	Decomposition of primary MC carbide and its effects on the fracture behaviors of a cast Ni-base superalloy
	X. Z. Qin; J. T. Guo; C. Yuan; C. L. Chen; J. S. Hou; H. Q. Ye
	2008
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	485 期号:1-2 页码:74-79
摘要	Primary MC degeneration in long-term thermally exposed cast Ni-base superalloy K452 was investigated in detail. It is shown that the primary MC degeneration is a diffusion-controlled process where various transformation products are sequentially present within the reaction region during exposure. The primary MC degeneration produces a DM or SM microstructure on the MC/gamma interface at the initiation of exposure, which hinders the diffusion of alloying elements via its ordered gamma' layers and leads to the presence of the eta and alpha-(W, Mo) phases, respectively during the intermediate and late exposure. In addition, the primary MC deterioration is examined to be detrimental to the long-term thermally exposed alloy due to its contribution to the cracking incidence especially when the MC is present at the grain boundaries. (C) 2007 Elsevier B.V. All rights reserved.
部门归属	[qin, x. z.; guo, j. t.; yuan, c.; chen, c. l.; hou, j. s.; ye, h. q.] chinese acad sci, inst met res, shenyang 110016, peoples r china.;guo, jt (reprint author), chinese acad sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china;jtguo@imr.ac.cn
关键词	Ni-base Superalloy Thermal Exposure Carbides Mc Decomposition Fracture Property Diffusion Mechanism Sx-superalloys Creep Microstructure Precipitation Elements Rupture Ni3al
URL	查看原文
WOS记录号	WOS:000256194300011
引用统计	被引频次：130[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/321006/33054
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. Decomposition of primary MC carbide and its effects on the fracture behaviors of a cast Ni-base superalloy[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2008,485(1-2):74-79.
APA	X. Z. Qin,J. T. Guo,C. Yuan,C. L. Chen,J. S. Hou,&H. Q. Ye.(2008).Decomposition of primary MC carbide and its effects on the fracture behaviors of a cast Ni-base superalloy.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,485(1-2),74-79.
MLA	X. Z. Qin,et al."Decomposition of primary MC carbide and its effects on the fracture behaviors of a cast Ni-base superalloy".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 485.1-2(2008):74-79.