Microstructure and fatigue behavior of laser-powder bed fusion austenitic stainless steel
文献类型：期刊论文
| 作者 | Yu, Chenfan1; Zhang, Peng2; Zhang, Zhefeng2; Liu, Wei1 |
| 刊名 | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2020-06-01 |
| 卷号 | 46页码:191-200 |
| 关键词 | Laser-powder bed fusion Austenitic stainless steel Microstructures Fatigue crack |
| ISSN号 | 1005-0302 |
| DOI | 10.1016/j.jmst.2019.08.047 |
| 通讯作者 | Liu, Wei(Liuw_tsinghua@163.com) |
| 英文摘要 | The microstructures and stress-controlled fatigue behavior of austenitic stainless steel (AISI 316 L stainless steel) fabricated via laser-powder bed fusion (L-PBF) technique were investigated. For L-PBF process, zigzag laser scanning strategy (scan rotation between successive layer was 0 degrees, ZZ sample) and cross-hatching layer scanning strategy (scan rotation between successive layer was 67 degrees, CH sample) were employed. By inducing different thermal history, it is found that the scan strategies of laser beam have a significant impact on grain size and morphology. Fatigue cracks generally initiated from persistent slip bands (PSBs) or grain boundaries (GBs). It is observed that PSBs could transfer the melt pool boundaries (MPBs) continuously. The MPBs have better strain compatibility compared with grain boundaries (GBs), thus MPBs would not be the initiation site of fatigue cracks. A higher fatigue limit strength could be achieved by employing a crosshatching scanning strategy. For the CH sample, fatigue cracks also initiated from GBs and PSBs. However, fatigue crack initiated from process-induced defects were observed in ZZ sample in high-cycle regions. Solidification microstructures and defects characteristics are important factors affecting the fatigue performance of L-PBF 316 L stainless. Process-induced defects originated from fluid instability can be effectively reduced by adjusting the laser scan strategy. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. |
| 资助项目 | National Magnetic Confinement Fusion Science Program of China[2014GB117000] ; National Natural Science Foundation of China[U1605243] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000525326000021 |
| 出版者 | JOURNAL MATER SCI TECHNOL |
| 资助机构 | National Magnetic Confinement Fusion Science Program of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/138367]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Liu, Wei |
| 作者单位 | 1.Tsinghua Univ, Sch Mat Sci & Engn, Beijing 100084, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Lab Fatigue & Fracture Mat, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Chenfan,Zhang, Peng,Zhang, Zhefeng,et al. Microstructure and fatigue behavior of laser-powder bed fusion austenitic stainless steel[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2020,46:191-200. |
| APA | Yu, Chenfan,Zhang, Peng,Zhang, Zhefeng,&Liu, Wei.(2020).Microstructure and fatigue behavior of laser-powder bed fusion austenitic stainless steel.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,46,191-200. |
| MLA | Yu, Chenfan,et al."Microstructure and fatigue behavior of laser-powder bed fusion austenitic stainless steel".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 46(2020):191-200. |
入库方式： OAI收割
来源：金属研究所
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