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Effect of silicon contents on the microstructures and mechanical properties of heat affected zones for 9Cr2WVTa steels
Wang, Jian; Lu, Shanping; Rong, Lijian; Li, Dianzhong; shplu@imr.ac.cn
2016
Source PublicationJOURNAL OF NUCLEAR MATERIALS
ISSN0022-3115
Volume470Pages:1-12
AbstractThe weldability of 9Cr2WVTa steels with silicon content varying from 0.30 wt.% to 1.36 wt.% was studied to meet the requirement of Generation-IV nuclear reactor. Samples of enlarged HAZs were fabricated by a thermal-mechanical simulator based on the simulation and measurement of non-equilibrium phase transformation. The content of delta-ferrite in the HAZs increased with the silicon content and the peak temperature of welding thermal cycle. The impact toughness in the HAZs decreased in different degrees when the delta-ferrite exhibits stripe (lower than 4.82%) or blocky types (higher than 4.82%). Post weld heat treatment (PWHT) has a significant role on improving the toughness. Adding silicon content increased the volume of delta-ferrite and therefore, decreased the tensile strength of the HAZs for 9Cr2WVTa steels. Silicon also as solid solution strengthening element increased the tensile strength. The 9Cr2WVTa steel has good weldability when the silicon content is lower than 0.60 wt.%. (C) 2015 Elsevier B.V. All rights reserved.
description.department[wang, jian ; lu, shanping ; li, dianzhong] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china ; [wang, jian ; rong, lijian] chinese acad sci, inst met res, key lab nucl mat & safety assessment, shenyang 110016, peoples r china
Keyword9cr2wvta Steel Silicon Content Delta-ferrite Solid Solution Strengthening Weldability
Funding OrganizationNational Natural Science Foundation of China [91226204]; Chinese Academy of Science Strategic Pilot Project (The future of advanced nuclear energy-ADS evolution system) [XDA03010304]
Indexed Bysci
Language英语
WOS IDWOS:000370379100001
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74770
Collection中国科学院金属研究所
Corresponding Authorshplu@imr.ac.cn
Recommended Citation
GB/T 7714
Wang, Jian,Lu, Shanping,Rong, Lijian,et al. Effect of silicon contents on the microstructures and mechanical properties of heat affected zones for 9Cr2WVTa steels[J]. JOURNAL OF NUCLEAR MATERIALS,2016,470:1-12.
APA Wang, Jian,Lu, Shanping,Rong, Lijian,Li, Dianzhong,&shplu@imr.ac.cn.(2016).Effect of silicon contents on the microstructures and mechanical properties of heat affected zones for 9Cr2WVTa steels.JOURNAL OF NUCLEAR MATERIALS,470,1-12.
MLA Wang, Jian,et al."Effect of silicon contents on the microstructures and mechanical properties of heat affected zones for 9Cr2WVTa steels".JOURNAL OF NUCLEAR MATERIALS 470(2016):1-12.
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