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Effect of tungsten content on the microstructure and tensile properties of Ni-xW-6Cr alloys
Liu, Shulin; Ye, Xiang-Xi; Jiang, Li; Cui, Chuanyong; Li, Zhijun; Huang, Hefei; Leng, Bin; Zhou, Xingtai; yexiangxi@sinap.ac.cn; lizhijun@sinap.ac.cn; zhouxingtai@sinap.ac.cn
2016
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume655Pages:269-276
AbstractNi-xW-6Cr alloys have been considered as one of the potential structural materials for molten salt techniques, whereas their microstructure and mechanical performance have not been sufficiently studied. In this study, the microstructure and tensile deformation behavior of Ni-(10-35 wt%)W-6Cr alloys have been systematically investigated. The phase diagram calculations indicated that the solubility limit of W is 34 wt% in Ni-xW-6Cr alloy. alpha-W phase is formed in the matrix while the W content exceeds such limit. The fracture of the Ni-(10-35 wt%)W-6Cr alloys at room temperature is in the transgranular ductile fracture mode. The tensile properties of alloys, except for the elongation of Ni-35 wt%W-6Cr alloy, are improved with the increase of W content, which can be explained by the larger lattice distortion, the lower stack fault energy and the higher length fraction of twin boundaries (Sigma 3 and Sigma 9 type) in the Ni-(10-35 wt%)W-6Cr alloys caused by the addition of more W. The reduced elongation of the Ni-35 wt%W-6Cr alloy is ascribed to the particles in alpha-W phase which act as the main nucleation sites for cracking. (C) 2016 Elsevier B.V. All rights reserved.
description.department[liu, shulin ; ye, xiang-xi ; jiang, li ; li, zhijun ; huang, hefei ; leng, bin ; zhou, xingtai] chinese acad sci, shanghai inst appl phys, ctr thorium molten salt reactor syst, shanghai 201800, pr, peoples r china ; [liu, shulin ; jiang, li] univ chinese acad sci, beijing 100049, peoples r china ; [cui, chuanyong] chinese acad sci, inst met res, shenyang 110016, peoples r china
KeywordNi-w-cr Alloy Alpha-w Phase Ebsd Tensile Deformation Twin Boundaries
Funding OrganizationProgram of International S&T Cooperation, ANSTO-SINAP [2014DFG60230]; National Natural Science Foundation of China [51371188, 51501216]; Strategic Priority Research Program of the Chinese Academy of Sciences [XDA02004210]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74776
Collection中国科学院金属研究所
Corresponding Authoryexiangxi@sinap.ac.cn; lizhijun@sinap.ac.cn; zhouxingtai@sinap.ac.cn
Recommended Citation
GB/T 7714
Liu, Shulin,Ye, Xiang-Xi,Jiang, Li,et al. Effect of tungsten content on the microstructure and tensile properties of Ni-xW-6Cr alloys[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2016,655:269-276.
APA Liu, Shulin.,Ye, Xiang-Xi.,Jiang, Li.,Cui, Chuanyong.,Li, Zhijun.,...&zhouxingtai@sinap.ac.cn.(2016).Effect of tungsten content on the microstructure and tensile properties of Ni-xW-6Cr alloys.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,655,269-276.
MLA Liu, Shulin,et al."Effect of tungsten content on the microstructure and tensile properties of Ni-xW-6Cr alloys".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 655(2016):269-276.
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