The micromechanism of alloying element Zr affecting the ductility of Ni3Al alloy with different Al contents

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	The micromechanism of alloying element Zr affecting the ductility of Ni3Al alloy with different Al contents
	Guo, JT; Li, YF; Xiong, LY; Ye, HQ
通讯作者	Guo, JT()
	2005-04-01
发表期刊	ACTA PHYSICA SINICA
ISSN	1000-3290
卷号	54 期号:4 页码:1868-1873
摘要	Positron lifetime parameters have been measured by position annihilation technique in binary Ni77Al23, and Ni74Al26 alloys with different Al contents and Ni3Al alloy doped with different amounts of Zr. The density of free electrons in bulk materials and grain boundaries was calculated in this paper. The results show that the density of free electrons in bulk materials and grain boundaries in Ni74Al26 alloy is lower than that in Ni77Al23 alloy. The open volume in grain boundary is larger in Ni74Al26 alloy, and the cohesion of grain boundaries is weaker. When an amount of Zr atoms is added into the Ni3Al alloy, they increase the density of free electrons in the bulk and thus increase the bonding cohesion in the bulk. The other Zr atoms will segregate at grain boundaries and increase their free electron density; this will strengthen the bonding cohesion in grain boundaries. Alloying element Zr is found to be beneficial to reduce the brittleness of Ni3Al alloy with different Al contents.
关键词	Ni3Al alloy micro-mechanism density of free electron ductlization
收录类别	SCI
语种	英语
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
WOS记录号	WOS:000228510600072
出版者	CHINESE PHYSICAL SOC
引用统计	被引频次：2[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/321006/83592
专题	中国科学院金属研究所
通讯作者	Guo, JT
作者单位	Chinese Acad Sci, Met Res Inst, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Guo, JT,Li, YF,Xiong, LY,et al. The micromechanism of alloying element Zr affecting the ductility of Ni3Al alloy with different Al contents[J]. ACTA PHYSICA SINICA,2005,54(4):1868-1873.
APA	Guo, JT,Li, YF,Xiong, LY,&Ye, HQ.(2005).The micromechanism of alloying element Zr affecting the ductility of Ni3Al alloy with different Al contents.ACTA PHYSICA SINICA,54(4),1868-1873.
MLA	Guo, JT,et al."The micromechanism of alloying element Zr affecting the ductility of Ni3Al alloy with different Al contents".ACTA PHYSICA SINICA 54.4(2005):1868-1873.