Comparative study of microstructure and properties of low-alloy-steel/nickel-based-alloy interfaces in dissimilar metal weld joints prepared by different GTAW methods
文献类型：期刊论文
| 作者 | Ming, HL; Wang, JQ; Han, EH; Wang, JQ (reprint author), Chinese Acad Sci, Inst Met Res, Liaoning Key Lab Safety & Assessment Tech Nucl Ma, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China. |
| 刊名 | MATERIALS CHARACTERIZATION
 |
| 出版日期 | 2018-05-01 |
| 卷号 | 139页码:186-196 |
| ISSN号 | 1044-5803 |
| 关键词 | Local Mechanical-properties Dip Cracking Susceptibility Stress-corrosion Cracking Fusion Boundary Region Safe-end Ferritic Steel Part 1 |
| 英文摘要 | Low-alloy-steel/buttering (or welding) metal interfaces in safe-end dissimilar metal weld joints (DMWJs) at nuclear power plants are weak parts. To optimize the quality of the safe-end DMWJs used for the construction of domestic nuclear power plants and to improve the welding productivity, a series of DMWJs in full-size have been manufactured by using different gas tungsten arc welding (GTAW) methods. The microstructure, chemical composition distribution and local properties across the SA508/52(M) interfaces in these DMWJs are studied. The high heat input and long high temperature duration during hot-wire GTAW process promote the carbon diffusion and grain boundary migration and hence the DMWJ by hot-wire GTAW has the largest amount of type I and type II boundaries and the widest carbon depleted zones and carbon enriched zones, which resulting in the worst performance among the DMWJs in simulated primary water. Type I and type II boundaries are high angle random grain boundaries (RGBs) and Cr-depleted zones are found along type II boundaries resulting in their high susceptibility to SCC. In addition, these boundaries are prone to be cracked during mechanical bending process.; Low-alloy-steel/buttering (or welding) metal interfaces in safe-end dissimilar metal weld joints (DMWJs) at nuclear power plants are weak parts. To optimize the quality of the safe-end DMWJs used for the construction of domestic nuclear power plants and to improve the welding productivity, a series of DMWJs in full-size have been manufactured by using different gas tungsten arc welding (GTAW) methods. The microstructure, chemical composition distribution and local properties across the SA508/52(M) interfaces in these DMWJs are studied. The high heat input and long high temperature duration during hot-wire GTAW process promote the carbon diffusion and grain boundary migration and hence the DMWJ by hot-wire GTAW has the largest amount of type I and type II boundaries and the widest carbon depleted zones and carbon enriched zones, which resulting in the worst performance among the DMWJs in simulated primary water. Type I and type II boundaries are high angle random grain boundaries (RGBs) and Cr-depleted zones are found along type II boundaries resulting in their high susceptibility to SCC. In addition, these boundaries are prone to be cracked during mechanical bending process. |
| 学科主题 | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing |
| 语种 | 英语 |
| 资助机构 | CAS [QYZDY-SSW-JSC012]; National Key Research and Development Program of China [2017YFB0702100, 2016YFE0105200]; Chinese Academy of Sciences [ZDRW-CN-2017-1] |
| 公开日期 | 2018-06-05 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/79322]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Wang, JQ (reprint author), Chinese Acad Sci, Inst Met Res, Liaoning Key Lab Safety & Assessment Tech Nucl Ma, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Ming, HL,Wang, JQ,Han, EH,et al. Comparative study of microstructure and properties of low-alloy-steel/nickel-based-alloy interfaces in dissimilar metal weld joints prepared by different GTAW methods[J]. MATERIALS CHARACTERIZATION,2018,139:186-196. |
| APA | Ming, HL,Wang, JQ,Han, EH,&Wang, JQ .(2018).Comparative study of microstructure and properties of low-alloy-steel/nickel-based-alloy interfaces in dissimilar metal weld joints prepared by different GTAW methods.MATERIALS CHARACTERIZATION,139,186-196. |
| MLA | Ming, HL,et al."Comparative study of microstructure and properties of low-alloy-steel/nickel-based-alloy interfaces in dissimilar metal weld joints prepared by different GTAW methods".MATERIALS CHARACTERIZATION 139(2018):186-196. |
入库方式： OAI收割
来源：金属研究所
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