Improvement of compressive strength and ductility in NiAl Cr(Nb)/Dy alloy by rapid solidification and HIP treatment

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	Improvement of compressive strength and ductility in NiAl Cr(Nb)/Dy alloy by rapid solidification and HIP treatment
	L. Y. Sheng; F. Yang; T. F. Xi; Y. F. Zheng; J. T. Guo
	2012
发表期刊	Intermetallics
ISSN	0966-9795
卷号	27 页码:14-20
摘要	The NiAl Cr(Nb)/Dy alloy was fabricated by conventionally casting and rapid solidification and treated by hot isostatic pressing treatment (HIP). The results reveal that Cr2Nb phase contains much of Ni and Al elements and retains the C14 crystal structure at room temperature. The rapid solidification refines the NiAl phase, Cr2Nb phase and needle-like Cr2Nb precipitates in NiAl matrix. Moreover the rapid solidification increases alpha-Cr phase and results in the formation of Cr7Ni3 phase with stacking faults and microtwins inside. The HIP treatment transforms the needle-like Cr2Nb precipitate in the NiAl phase into sphere shape and blunts the tip of the Cr2Nb phases along the NiAl phase boundary. In addition, the HIP treatment leads to some moveable dislocations in the alloy, which is beneficial to the compressive ductility. The mechanical test shows the rapidly solidified alloy with HIP treatment has the best mechanical properties, whose compressive ductility is more than ten times that of the as cast alloy. (C) 2012 Elsevier Ltd. 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, coll engn, beijing 100871, peoples r china. [yang, f.] shenzhen baoan int airport, shenzhen airlines, shenzhen 518128, peoples r china. [guo, j. t.] 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	Nial Rapid Solidification Microstructure Mechanical Properties Hip Treatment Nial-cr(Mo)-hf Eutectic Alloy High-temperature Application Mechanical-properties Deformation-behavior Laves Phase Ta Alloys Microstructure Compound
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60220
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. Y. Sheng,F. Yang,T. F. Xi,et al. Improvement of compressive strength and ductility in NiAl Cr(Nb)/Dy alloy by rapid solidification and HIP treatment[J]. Intermetallics,2012,27:14-20.
APA	L. Y. Sheng,F. Yang,T. F. Xi,Y. F. Zheng,&J. T. Guo.(2012).Improvement of compressive strength and ductility in NiAl Cr(Nb)/Dy alloy by rapid solidification and HIP treatment.Intermetallics,27,14-20.
MLA	L. Y. Sheng,et al."Improvement of compressive strength and ductility in NiAl Cr(Nb)/Dy alloy by rapid solidification and HIP treatment".Intermetallics 27(2012):14-20.