Crystallographic characteristics and mechanical behavior of laser welded joints of hot roll bending parts
文献类型：期刊论文
| 作者 | Wang, Shuwen1; Chen, Shujun1; Yuan, Tao1; Jiang, Xiaoqing1; Zhao, Pengjing1; Ding, Wutong2 |
| 刊名 | MATERIALS CHARACTERIZATION
 |
| 出版日期 | 2024 |
| 卷号 | 207页码:15 |
| 关键词 | Laser welding Microstructure Mechanical properties Crystallographic characteristics Texture |
| ISSN号 | 1044-5803 |
| DOI | 10.1016/j.matchar.2023.113466 |
| 通讯作者 | Yuan, Tao(ty29@bjut.edu.cn) |
| 英文摘要 | In this work, laser welding was performed on the hot roll bending parts obtained by local-induction-heating bending forming. The influence of the crystallographic characteristics of the phase transformation products in different regions of the laser welded joint on the mechanical properties was systematically studied, and the reasons for the performance degradation were discussed in detail. The results show that upper-critical HAZ (UCHAZ) forms coarse prior austenite grain (PAG) and bainite, resulting in the lowest dislocation density of 2.5 x 1014 m- 2 and the lowest impact toughness value of 46 J/cm2. Sub-critical HAZ (SCHAZ) forms tempered martensite, causing the joint to soften and the tensile strength to decrease by 18%. The number of variants in SCHAZ is the lowest, where short laths with smaller misorientations merge into long laths, and precipitates nucleation and growth occurs. The uniform orientation of the variants in SCHAZ forms low-angle grain boundaries (LAGBs), which reduces the hindrance to crack propagation, so the mechanical properties of SCHAZ decrease. In addition, the texture analysis found that UCHAZ has the highest (001)//RD orientation volume fraction, indicating that UCHAZ is most prone to rapid expansion of brittle cracks on the {001} cleavage plane, so the toughness of UCHAZ is reduced. SCHAZ has the highest {001}(110) texture volume fraction and the lowest proportion of high-angle grain boundaries (HAGB), indicating that the deformed grain structure with the {001} cleavage planes distributed along the LAGB after welding heat tempering is the main reasons for the delamination of SCHAZ. |
| 资助项目 | National Natural Science Foundation of China[52075009] ; National Natural Science Foundation of China[52205323] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001165626100001 |
| 出版者 | ELSEVIER SCIENCE INC |
| 资助机构 | National Natural Science Foundation of China |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Yuan, Tao |
| 作者单位 | 1.Beijing Univ Technol, Engn Res Ctr Adv Mfg Technol Automot Components, Minist Educ, Welding Equipment R&D Ctr, Beijing 100124, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Shuwen,Chen, Shujun,Yuan, Tao,et al. Crystallographic characteristics and mechanical behavior of laser welded joints of hot roll bending parts[J]. MATERIALS CHARACTERIZATION,2024,207:15. |
| APA | Wang, Shuwen,Chen, Shujun,Yuan, Tao,Jiang, Xiaoqing,Zhao, Pengjing,&Ding, Wutong.(2024).Crystallographic characteristics and mechanical behavior of laser welded joints of hot roll bending parts.MATERIALS CHARACTERIZATION,207,15. |
| MLA | Wang, Shuwen,et al."Crystallographic characteristics and mechanical behavior of laser welded joints of hot roll bending parts".MATERIALS CHARACTERIZATION 207(2024):15. |
入库方式： OAI收割
来源：金属研究所
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