Effects of Si Addition and Long-Term Thermal Exposure on the Tensile Properties of a Ni-Mo-Cr Superalloy

IMR OpenIR

	Effects of Si Addition and Long-Term Thermal Exposure on the Tensile Properties of a Ni-Mo-Cr Superalloy
	Xu, Zhou-Feng; Dong, Jia-Sheng; Jiang, Li; Li, Zhi-Jun; Zhou, Xing-Tai; jiangli@sinap.ac.cn; zhouxingtai@sinap.ac.cn
	2015
发表期刊	ACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN	1006-7191
卷号	28 期号:8 页码:951-957
摘要	The effect of long-term thermal exposure on the grain boundary carbides and the tensile behavior of two kinds of Ni-Mo-Cr superalloys with different silicon contents (0 and 0.46 wt%) was investigated. Experimental results showed granular M2C carbides formed at the grain boundaries after exposure for 100 h for the non-silicon alloy. Furthermore, these fine granular M2C carbides will transform into plate-like M6C carbides as exposure time increases. For the Si-containing alloys, only the granular M6C carbides formed at the grain boundaries during the whole exposure time. The coarsening of the grain boundary carbides occurred in both alloys with increasing exposure time. In addition, the coarsening kinetics of the grain boundary carbides for the non-silicon alloy is faster than that of the standard alloy. The tensile properties of both alloys are improved after exposure for 100 h due to the formation of nano-sized grain boundary carbides. The grain boundary carbides are coarsened more seriously for non-silicon alloys than that of Si-containing alloys, resulting in a more significant decrease in the tensile strength and elongation for the former case. Silicon additions can effectively inhibit the severe coarsening of the grain boundary carbides and thus avoid the obvious deterioration of the tensile properties after a long-term thermal exposure.
部门归属	[xu, zhou-feng ; jiang, li ; li, zhi-jun ; zhou, xing-tai] chinese acad sci, shanghai inst appl phys, thorium molten salts reactor ctr, shanghai 201204, peoples r china ; [xu, zhou-feng] univ chinese acad sci, beijing 100049, peoples r china ; [dong, jia-sheng] chinese acad sci, inst met res, shenyang 110016, peoples r china
关键词	Ni-cr-mo Silicon Carbides Mechanical Properties
资助者	program of International S&T Cooperation, ANSTO-SINAP [2014DFG60230]; National Natural Science Foundation of China [51371188]; Strategic Priority Research Program of the Chinese Academy of Sciences [XDA02004210]; Science and Technology Commission of Shanghai Municipality [11JC1414900]
收录类别	sci
语种	英语
WOS记录号	WOS:000360785100001
引用统计	被引频次：16[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/321006/74792
专题	中国科学院金属研究所
通讯作者	jiangli@sinap.ac.cn; zhouxingtai@sinap.ac.cn
推荐引用方式 GB/T 7714	Xu, Zhou-Feng,Dong, Jia-Sheng,Jiang, Li,et al. Effects of Si Addition and Long-Term Thermal Exposure on the Tensile Properties of a Ni-Mo-Cr Superalloy[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2015,28(8):951-957.
APA	Xu, Zhou-Feng.,Dong, Jia-Sheng.,Jiang, Li.,Li, Zhi-Jun.,Zhou, Xing-Tai.,...&zhouxingtai@sinap.ac.cn.(2015).Effects of Si Addition and Long-Term Thermal Exposure on the Tensile Properties of a Ni-Mo-Cr Superalloy.ACTA METALLURGICA SINICA-ENGLISH LETTERS,28(8),951-957.
MLA	Xu, Zhou-Feng,et al."Effects of Si Addition and Long-Term Thermal Exposure on the Tensile Properties of a Ni-Mo-Cr Superalloy".ACTA METALLURGICA SINICA-ENGLISH LETTERS 28.8(2015):951-957.