On the orientation dependent microstructure and mechanical behavior of Hastelloy X superalloy fabricated by laser powder bed fusion
文献类型：期刊论文
| 作者 | Huang, Ziliang2; Zhai, Zirong2; Lin, Wenhu2; Chang, Hai2; Wu, Yingna2; Yang, Rui1,2; Zhang, Zhenbo2 |
| 刊名 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| 出版日期 | 2022-06-02 |
| 卷号 | 844页码:14 |
| ISSN号 | 0921-5093 |
| 关键词 | Laser powder bed fusion Hastelloy X Anisotropy Mechanical properties Orientation dependent |
| DOI | 10.1016/j.msea.2022.143208 |
| 通讯作者 | Zhang, Zhenbo(zhangzhb1@shanghaitech.edu.cn) |
| 英文摘要 | Ni-based superalloys fabricated by laser powder bed fusion (LPBF) have shown great potential in various in-dustrial sectors with demanding environments, but limited understanding of the microstructure-property rela-tionship of the LPBF fabricated alloys hinders their practical applications. In this study, Ni-based superalloy Hastelloy X (HX) was manufactured by LPBF, and the resulting microstructure was characterized using multi-scale correlative microscopy and its relationships with mechanical behaviors were investigated. A typical cellular structure formed during LPBF, and cell walls enriched with Cr and Mo and contained a high density of dislo-cations. Most of cell boundaries had very low misorientation angles, and misorientation accumulation across a bundle of cells was observed. Correlative microscopic characterizations demonstrated that epitaxial cell growth across molten pool boundaries between adjacent layers and side-branching between neighboring tracks resulted in the formation of a strong Goss texture. Mechanical testing showed that the fabricated HX alloy exhibited a lower strength and a higher tensile ductility along the building direction, compared to those along transverse directions. The governing mechanism for the strength anisotropy was the anisotropic columnar grain structure, and the better tensile ductility was caused by the higher tendency in forming mechanical twins of Goss-oriented grains and lower vulnerability in microcrack propagation during tensioning. More importantly, a very pro-nounced anisotropy in plasticity was found, where macroscopic shape change from circular to highly elliptical was observed in the sample after tensioning along the building direction. A model based on the orientation-dependent dislocation activity that resulted in a planar strain during tensioning was proposed to interpret the anisotropic plastic deformation. |
| 资助项目 | National Natural Science Foundation of China[52001212] ; ShanghaiTech University Startup fund |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE SA |
| WOS记录号 | WOS:000797497300001 |
| 资助机构 | National Natural Science Foundation of China ; ShanghaiTech University Startup fund |
| 源URL | [http://ir.imr.ac.cn/handle/321006/174004]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Zhang, Zhenbo |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.ShanghaiTech Univ, Ctr Adapt Syst Engn, Sch Creat & Art, Shanghai 201210, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang, Ziliang,Zhai, Zirong,Lin, Wenhu,et al. On the orientation dependent microstructure and mechanical behavior of Hastelloy X superalloy fabricated by laser powder bed fusion[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2022,844:14. |
| APA | Huang, Ziliang.,Zhai, Zirong.,Lin, Wenhu.,Chang, Hai.,Wu, Yingna.,...&Zhang, Zhenbo.(2022).On the orientation dependent microstructure and mechanical behavior of Hastelloy X superalloy fabricated by laser powder bed fusion.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,844,14. |
| MLA | Huang, Ziliang,et al."On the orientation dependent microstructure and mechanical behavior of Hastelloy X superalloy fabricated by laser powder bed fusion".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 844(2022):14. |
入库方式： OAI收割
来源：金属研究所
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