Microstructural evolution and mechanical properties of new multi-phase NiAl-based alloy during heat treatments

IMR OpenIR

	Microstructural evolution and mechanical properties of new multi-phase NiAl-based alloy during heat treatments
	Y. Xie; J. T. Guo; L. Z. Zhou; H. D. Chen; Y. Long
	2010
发表期刊	Transactions of Nonferrous Metals Society of China
ISSN	1003-6326
卷号	20 期号:12 页码:2265-2271
摘要	Microstructural evolution and the relationship between microstructure and property during heat treatments in a new NiAl-based alloy (Ni-26.6Al-13.4Cr-8.1Co-4.3Ti-1.3W-0.9Mo, molar fraction, %)) were investigated. The as-cast alloy is composed of NiAl matrix and Cr(3)Ni(2) phase with poor ductility. The Cr(3)Ni(2) phase is distributed as a network along the NiAl grain boundaries. Subsequent heat treatment (1 523 K, 20 h, air cooling+1 123 K, 16 h, furnace cooling) leads to the dissolution of Cr(3)Ni(2) phase and the precipitation of lath-shaped Ni(3)Al phase and alpha-Cr particles, resulting in the improvement of compressive properties and fracture toughness at room temperature. Followed by long-term thermal exposure (1 173 K, 8 500 h), it is found that the residual Cr(3)Ni(2) phase keeps stable while the alpha-Cr particles coarsen and a great mass of lath-shaped Ni(3)Al precipitates are degenerated, which compromises most of the above improvements of mechanical properties through heat treatment.
部门归属	[xie yi; chen hong-dong; long yi] hunan elect power test & res inst, changsha 410007, hunan, peoples r china. [xie yi; guo jian-ting; zhou lan-zhang] chinese acad sci, inst met res, shenyang 110016, peoples r china.;xie, y (reprint author), hunan elect power test & res inst, changsha 410007, hunan, peoples r china;yxie001@126.com
关键词	Nial-based Alloy Heat Treatment Microstructure Mechanical Properties Eutectic Alloy Temperature Deformation Behavior Cr Ti Additions Precipitation Composites Mo Hf
URL	查看原文
WOS记录号	WOS:000285966700010
引用统计	被引频次：7[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/321006/31601
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Xie,J. T. Guo,L. Z. Zhou,et al. Microstructural evolution and mechanical properties of new multi-phase NiAl-based alloy during heat treatments[J]. Transactions of Nonferrous Metals Society of China,2010,20(12):2265-2271.
APA	Y. Xie,J. T. Guo,L. Z. Zhou,H. D. Chen,&Y. Long.(2010).Microstructural evolution and mechanical properties of new multi-phase NiAl-based alloy during heat treatments.Transactions of Nonferrous Metals Society of China,20(12),2265-2271.
MLA	Y. Xie,et al."Microstructural evolution and mechanical properties of new multi-phase NiAl-based alloy during heat treatments".Transactions of Nonferrous Metals Society of China 20.12(2010):2265-2271.