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Thermal cycling, microstructure and mechanical properties of 9Cr2WVTa steel welds
Wang, Jian; Lu, Shanping; Rong, Lijian; Li, Dianzhong; shplu@imr.ac.cn
2015
发表期刊JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
ISSN0924-0136
卷号222页码:434-443
摘要Samples of enlarged heat affected zones (HAZs) submitted to single and double welding thermal cycles were fabricated by a thermal-mechanical physical simulator (Gleeble 1500). Typical welding thermal cycle curves were extracted based on the measurement of the non-equilibrium phase transformation of 9Cr2WVTa steel, and the simulated and experimental thermal cycles were compared. Observation of the microstructure revealed that the blocky delta-ferrite that existed in the coarse grained heat affected zone (CGHAZ) was the main cause of the decrease in impact toughness. Each of the areas retained the delta-ferrite with different sizes and shapes after the CGHAZ underwent the second welding thermal cycle. Hardness tests, tensile tests, and instrumented impact tests were carried out to investigate the corresponding mechanical properties. When the peak temperature of the second welding thermal cycle was 1315 degrees C, grain and structure coarsening was the main causes of the decrease in impact toughness. When the peak temperature of the second welding thermal cycle was decreased to 1100 degrees C, the toughness increased the most due to the fine grains formed by phase transformation recrystallization. (C) 2015 Elsevier B.V. All rights reserved.
部门归属[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
关键词9cr2wvta Steel Welding Thermal Cycle Delta Ferrite Grain And Structure Coarsening Phase Transformation Recrystallization
资助者National Natural Science Foundation of China [91226204]; Chinese Academy of Science Strategic Pilot Project [XDA03010304]
收录类别sci
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/75214
专题中国科学院金属研究所
通讯作者shplu@imr.ac.cn
推荐引用方式
GB/T 7714
Wang, Jian,Lu, Shanping,Rong, Lijian,et al. Thermal cycling, microstructure and mechanical properties of 9Cr2WVTa steel welds[J]. JOURNAL OF MATERIALS PROCESSING TECHNOLOGY,2015,222:434-443.
APA Wang, Jian,Lu, Shanping,Rong, Lijian,Li, Dianzhong,&shplu@imr.ac.cn.(2015).Thermal cycling, microstructure and mechanical properties of 9Cr2WVTa steel welds.JOURNAL OF MATERIALS PROCESSING TECHNOLOGY,222,434-443.
MLA Wang, Jian,et al."Thermal cycling, microstructure and mechanical properties of 9Cr2WVTa steel welds".JOURNAL OF MATERIALS PROCESSING TECHNOLOGY 222(2015):434-443.
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