Microstructure and Impact Toughness of Local-Dry Keyhole Tungsten Inert Gas Welded Joints
| Autor: | Shuwan Cui, Zhiyong Xian, Yonghua Shi, Baoyi Liao, Tao Zhu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
underwater local-dry keyhole tungsten inert gas welding
impact toughness phase interface Σ3 coincidence site lattice boundary Technology Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 |
| Zdroj: | Materials, Vol 12, Iss 10, p 1638 (2019) |
| Druh dokumentu: | article |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma12101638 |
| Popis: | In this paper, the microstructure and impact toughness of a S32101 duplex stainless steel underwater local-dry keyhole tungsten inert gas welded joint were studied. The impact toughness value of the underwater weld metal reached 78% of the onshore weld metal, which is in accordance with the underwater welding standards. The proportion of austenite in the underwater weld metal was 0.9% lower than that of the onshore weld metal. The proportion of the Σ3 coincidence site lattice boundaries and random phase boundaries in the underwater weld metal, which significantly influence the impact toughness of the weld metal, were smaller than that of the onshore weld metal. |
| Databáze: | Directory of Open Access Journals |
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