Microstructure characteristics and compressive properties of NiAl-based multiphase alloy during heat treatments

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	Microstructure characteristics and compressive properties of NiAl-based multiphase alloy during heat treatments
	L. Y. Sheng; Y. Xie; T. F. Xi; J. T. Guo; Y. F. Zheng; H. Q. Ye
	2011
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	528 期号:29-30 页码:8324-8331
摘要	The alloy of Ni-Al26-Cr15-Co6-Ti3-Mo2-Nb0.5-Ho0.1 (at.%) was heat-treated and studied by microstructure examination and compressive test. The results reveal that in the as-cast alloy, alpha-Cr, sigma and mu phases are segregated along the NiAl phase boundary and form into network. Small Ni(2)AlTi, Cr(2)Nb and Ni(2)Al(3)Ho particles precipitate at NiAl grain boundary. The subsequent solid solution treatment with rapid and intermediate cooling rate transforms the net-like precipitating phases into discontinuous ones, but the rapid cooling leads to micro-cracks along phase boundary. However the lower cooling rate results in spherical a-Cr particle and needle-like Ni(3)Alphase in NiAl matrix. The short-term aging after solid solution treatment promotes the coarsening of Ni(3)Al lathes and a-Cr particles, and an orientation relationship of [00 (1) over bar](beta)parallel to[(1) over bar 10](lambda), and (110)(beta)parallel to(111)(gamma), is found between lath-shaped Ni(3)Al phase and NiAl matrix. In addition, the p. phases are substituted by sigma and some Cr(3)Ni(2) phases. The long-term aging treatment reduces Ni(3)Al, sigma and mu phases and coarsens the alpha-Cr phase further. The solid solution treatment and short-term aging improve the mechanical properties of the NiAl-based multiphase alloy significantly. (C) 2011 Elsevier B.V. All rights reserved.
部门归属	[sheng, l. y.] pku hkust shenzhen hong kong inst, shenzhen 518057, peoples r china. [sheng, l. y.; xi, t. f.; zheng, y. f.] peking univ, beijing 100871, peoples r china. [xie, y.] hunan elect power test & res inst, changsha 410007, hunan, peoples r china. [guo, j. t.; ye, h. q.] chinese acad sci, inst met res, shenyang 110016, peoples r china.;sheng, ly (reprint author), pku hkust shenzhen hong kong inst, shenzhen 518057, peoples r china;lysheng@yeah.net
关键词	Intermetallics Microstructure Heat Treatments Compressive Properties Mechanical-properties Eutectic Alloy Deformation-behavior Udimet 720li Precipitation Phase Superalloy Nickel Cr Stability
URL	查看原文
WOS记录号	WOS:000296676800003
引用统计	被引频次：51[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/321006/30654
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. Y. Sheng,Y. Xie,T. F. Xi,et al. Microstructure characteristics and compressive properties of NiAl-based multiphase alloy during heat treatments[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2011,528(29-30):8324-8331.
APA	L. Y. Sheng,Y. Xie,T. F. Xi,J. T. Guo,Y. F. Zheng,&H. Q. Ye.(2011).Microstructure characteristics and compressive properties of NiAl-based multiphase alloy during heat treatments.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,528(29-30),8324-8331.
MLA	L. Y. Sheng,et al."Microstructure characteristics and compressive properties of NiAl-based multiphase alloy during heat treatments".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 528.29-30(2011):8324-8331.

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