Effects of Hf additions on high-temperature mechanical properties of a directionally solidified NiAl/Cr(Mo) eutectic alloy

doi:10.1016/j.jallcom.2007.08.065

IMR OpenIR

	Effects of Hf additions on high-temperature mechanical properties of a directionally solidified NiAl/Cr(Mo) eutectic alloy
	Cui, C. Y.; Guo, J. T.; Ye, H. Q.
通讯作者	Cui, C. Y.(Cui.chuanyong@nims.go.jp)
	2008-09-08
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	463 期号:1-2 页码:263-270
摘要	In order to improve the high-temperature mechanical properties of NiAl/Cr(Mo) alloys, the effects of Hf additions on microstructure and mechanical properties were systemically examined. Two directionally solidified alloys with composition of Ni-32Al-28Cr-(6-x)Mo-xHf (x = 0.2 and 0.5 at.%. respectively), named as 0.2Hf and 0.5Hf hereafter, were prepared. The Hf additions disturbed the cellular structure. The 0.2Hf alloy consisted of dendritic structure, while the 0.51-If alloy had an intercellular structure. In the 0.51-If alloy, the Ni2AlHf and Ni16Hf6Si7 precipitates were also confirmed. The high-temperature strength and brittle-to-ductile transition temperature (BDTT) increased with increasing of Hf additions, due to the different strengthening mechanism. In contrast, the ductility and creep resistance decreased with increasing off-If because of the disturbance of cellular structure. (C) 2007 Elsevier B.V. All rights reserved.
关键词	intermetallics casting scanning and transmission electron microscopy high-temperature alloys
DOI	10.1016/j.jallcom.2007.08.065
收录类别	SCI
语种	英语
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000258697300048
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：24[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/321006/93212
专题	中国科学院金属研究所
通讯作者	Cui, C. Y.
作者单位	Chinese Acad Sci, Met Res Inst, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Cui, C. Y.,Guo, J. T.,Ye, H. Q.. Effects of Hf additions on high-temperature mechanical properties of a directionally solidified NiAl/Cr(Mo) eutectic alloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2008,463(1-2):263-270.
APA	Cui, C. Y.,Guo, J. T.,&Ye, H. Q..(2008).Effects of Hf additions on high-temperature mechanical properties of a directionally solidified NiAl/Cr(Mo) eutectic alloy.JOURNAL OF ALLOYS AND COMPOUNDS,463(1-2),263-270.
MLA	Cui, C. Y.,et al."Effects of Hf additions on high-temperature mechanical properties of a directionally solidified NiAl/Cr(Mo) eutectic alloy".JOURNAL OF ALLOYS AND COMPOUNDS 463.1-2(2008):263-270.