| 题名: | Microstructure of a safe-end dissimilar metal weld joint (SA508-52-316L) prepared by narrow-gap GTAW |
| 作者: | Ming, Hongliang; Zhang, Zhiming; Wang, Jianqiu; Han, En-Hou; Wang, Peipei; Sun, Zhiyuan |
| 发表日期: | 2017 |
| 摘要: | The microstructure, residual strain and interfacial chemical composition distribution of a safe-end dissimilar metal weld joint (DMWJ, SA508-52-316L) prepared by narrow-gap gas-tungsten arc welding (NG-GTAW) were studied by optical microscope (OM) and scanning electron microscope equipped with an energy dispersive X-ray microanalysis (SEM/EDX) and an electron back scattering diffraction (EBSD) system. Complex microstructure and chemical composition distribution are found, especially at the SA508-52 interface and the 52-316L interface. In brief, a complicated microstructure transition exists within the SA508 heat affected zone (HAZ); the residual strain, the fraction of high angle random grain boundaries and low angle boundaries decrease with increasing the distance from the fusion boundary in 316L HAZ; neither typical type II boundary nor obvious carbon-depleted zone is found near the SA508-52 interface; dramatic and complicated changes of the contents of the main elements, Fe, Cr and Ni, are observed at the distinct interfaces, especially at the SA508-52 interface. No carbon concentration is found at the SA508-52 interface. (C) 2016 Elsevier Inc. All rights reserved. |
| 刊名: | MATERIALS CHARACTERIZATION |
| Appears in Collections: | 中国科学院金属研究所_期刊论文
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| Recommended Citation: | |
Ming, Hongliang,Zhang, Zhiming,Wang, Jianqiu,et al. Microstructure Of A Safe-end Dissimilar Metal Weld Joint (sa508-52-316l) Prepared By Narrow-gap Gtaw[J]. Materials Characterization,2017,123:233-243.
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