Comprehensive Analysis of Cold-Cracking Ratio for Flux-Cored Arc Steel Welds Using Y- and y-Grooves
| Autor: | Hyunbin Nam, Namkyu Kim, Jaeseok Yoo, Sang-Woo Song, Hanji Park, Namhyun Kang, Kwang-hee Yun, Guo Xian |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Materials science Flux-cored arc welding Bainite Alloy microstructure Welding engineering.material Article law.invention law General Materials Science flux-cored arc welding stress concentration Stress concentration Microscopy QC120-168.85 diffusible hydrogen Metallurgy QH201-278.5 Microstructure Engineering (General). Civil engineering (General) groove shape hardness TK1-9971 Cracking Descriptive and experimental mechanics Martensite engineering cold crack Electrical engineering. Electronics. Nuclear engineering TA1-2040 welding materials |
| Zdroj: | Materials Volume 14 Issue 18 Materials, Vol 14, Iss 5349, p 5349 (2021) |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma14185349 |
| Popis: | This study investigates various factors that influence the cold-cracking ratio (CCR) of flux-cored arc welds through Y- and y-groove tests. Factors affecting the CCR include the alloy component, diffusible hydrogen content, microstructure, hardness, and groove shape. In weld metals (WMs WM375-R and WM375-B) of a low-strength grade, the diffusible hydrogen content has a more significant effect on the CCR than the carbon equivalent (Ceq) and microstructure. However, the combined effects of the microstructure and diffusible hydrogen content on the CCR are important in high-strength-grade WM. The CCR of the WM increased upon increasing Ceq and the strength grade because hard martensite and bainite microstructures were formed. Moreover, y-groove testing of the 500 MPa grade WM revealed a more significant CCR than that of the 375 MPa grade WM. Therefore, in high-strength-grade WMs, it is necessary to select the groove shape based on the morphology in the real welds. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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