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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
Source PublicationACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN1006-7191
Volume28Issue:8Pages:951-957
AbstractThe 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.
description.department[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
KeywordNi-cr-mo Silicon Carbides Mechanical Properties
Funding Organizationprogram 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]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74792
Collection中国科学院金属研究所
Corresponding Authorjiangli@sinap.ac.cn; zhouxingtai@sinap.ac.cn
Recommended Citation
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.
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