Numerical simulation of effects of the minor active-element oxygen on the Marangoni convection and the weld shape
文献类型：期刊论文
| 作者 | Dong Wenchao; Lu Shanping; Li Dianzhong; Li Yiyi |
| 刊名 | ACTA METALLURGICA SINICA
 |
| 出版日期 | 2008-02-01 |
| 卷号 | 44期号:2页码:249-256 |
| 关键词 | minor active-element oxygen Marangoni convection weld shape numerical simulation |
| ISSN号 | 0412-1961 |
| 通讯作者 | Lu Shanping(shplu@imr.ac.cn) |
| 英文摘要 | A mathematical model was developed to calculate the 3D transient temperature, velocity distribution and the evolution of weld pool shape in a stationary gas tungsten arc (GTA) weld pool of 304 stainless steels with different oxygen contents. The results indicate that when the oxygen content increased, the convection pattern in the weld pool changed from a dominant outward convection, outward on pool center together with inward on pool periphery, and finally to a dominant inward convection. Accordingly, the weld pool evolves from a shallow wide shape, a spoon-like shape to a deep narrow one. The minor active-element oxygen in the weld pool influences on the temperature coefficient of the surface tension (partial derivative gamma/partial derivative T) directly, which leads to the significant change of the Marangoni convection pattern and hence the weld shape. When the oxygen content is below 80X10(-6), an outward Marangoni convection pattern on the weld pool surface occurs, and forms a shallow and wide weld shape. As the oxygen content exceeding 120x10(-6), the Marangoni convection changes to inward direction and the weld shape varies from a shallow and wide shape to a deep and narrow one. When the oxygen content is between 80x10(-6) and 120x10(-6), the weld pool exhibits a spoon-like shape. And as time going, the outward convection region in the weld pool becomes smaller gradually, and the inward convection region becomes larger. The simulation results agree well with the experimental data under Ar-O-2 mixed shielding stationary GTA welding on SUS304 plates. |
| WOS研究方向 | Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000253792500023 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.imr.ac.cn/handle/321006/95313]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Lu Shanping |
| 作者单位 | Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dong Wenchao,Lu Shanping,Li Dianzhong,et al. Numerical simulation of effects of the minor active-element oxygen on the Marangoni convection and the weld shape[J]. ACTA METALLURGICA SINICA,2008,44(2):249-256. |
| APA | Dong Wenchao,Lu Shanping,Li Dianzhong,&Li Yiyi.(2008).Numerical simulation of effects of the minor active-element oxygen on the Marangoni convection and the weld shape.ACTA METALLURGICA SINICA,44(2),249-256. |
| MLA | Dong Wenchao,et al."Numerical simulation of effects of the minor active-element oxygen on the Marangoni convection and the weld shape".ACTA METALLURGICA SINICA 44.2(2008):249-256. |
入库方式： OAI收割
来源：金属研究所
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