Surface roughness and pore evolutions in multi-layer laser powder bed fusion of extra-low interstitial Ti-5Al-2.5Sn powder: A numerical study
文献类型：期刊论文
| 作者 | Long, Yifu1; An, Xizhong1; Wang, Ju1; Li, Meng1; Wu, Qiong1; Jiang, Chuanning1; Liu, Junfei1; Ren, Dechun2; Ji, Haibin2; Li, Shujun2 |
| 刊名 | ADDITIVE MANUFACTURING
 |
| 出版日期 | 2024-09-05 |
| 卷号 | 95页码:21 |
| 关键词 | Additive manufacturing DEM/CFD simulations Multi-layer laser powder bed fusion Surface roughness Pore defects |
| ISSN号 | 2214-8604 |
| DOI | 10.1016/j.addma.2024.104530 |
| 通讯作者 | An, Xizhong(anxz@mail.neu.edu.cn) |
| 英文摘要 | In this paper, the three-dimensional discrete element method (DEM) and computational fluid dynamics (CFD) coupled approach was used to numerically reproduce the whole process of laser powder-bed-fusion (L-PBF) additive manufacturing (AM) of extra-low interstitial (ELI) Ti-5Al-2.5Sn powder. The effects of key parameters such as scanning strategy and hatch spacing (h) on the surface roughness (Ra) and pores during multi-layer printing are systematically investigated by characterizing the molten pool characteristics and thermal behavior upon laser motion; and the melt volume in this duration is quantified by the volume of fluid (VOF) method to demonstrate inter-layer interactions. The results show that Ra can be categorized according to the scanning directions. Along the scanning direction, the Ra is affected by the heat accumulation effect and increases as the h decreases. In this case, the Ra caused by the Marangoni effect can be reduced by increasing the melt volume at the end of the track through the layer rotation. The Ra perpendicular to the scanning direction is caused by the ripple-like surface formed by track overlap and decreases as the h decreases. For defects, the pores formed by shrinkage due to insufficient melting or by lack of fusion (LoF) due to incomplete track overlap decrease with the decrease of h. The LoF pores caused by weak inter-layer metallurgical bonding are affected by the surface morphology of the previous layer, which is increased as the h increases. The layer rotation can also reduce such LoF pores. On this basis, a quality control chart suitable for actual production is established. |
| 资助项目 | Liaoning Revitalization Talents Pro-gram[XLYC1805007] ; CAS Interdisciplinary Innovation Team Project[JCTD-2020-10] |
| WOS研究方向 | Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001355373200001 |
| 出版者 | ELSEVIER |
| 资助机构 | Liaoning Revitalization Talents Pro-gram ; CAS Interdisciplinary Innovation Team Project |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | An, Xizhong |
| 作者单位 | 1.Northeastern Univ, Sch Met, Key Lab Ecol Met Multimet Mineral, Minist Educ, Shenyang 110819, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shichangxu Adv Mat Innovat Ctr, Shenyang 110016, Liaoning, Peoples R China |
| 推荐引用方式 GB/T 7714 | Long, Yifu,An, Xizhong,Wang, Ju,et al. Surface roughness and pore evolutions in multi-layer laser powder bed fusion of extra-low interstitial Ti-5Al-2.5Sn powder: A numerical study[J]. ADDITIVE MANUFACTURING,2024,95:21. |
| APA | Long, Yifu.,An, Xizhong.,Wang, Ju.,Li, Meng.,Wu, Qiong.,...&Zhang, Xing.(2024).Surface roughness and pore evolutions in multi-layer laser powder bed fusion of extra-low interstitial Ti-5Al-2.5Sn powder: A numerical study.ADDITIVE MANUFACTURING,95,21. |
| MLA | Long, Yifu,et al."Surface roughness and pore evolutions in multi-layer laser powder bed fusion of extra-low interstitial Ti-5Al-2.5Sn powder: A numerical study".ADDITIVE MANUFACTURING 95(2024):21. |
入库方式： OAI收割
来源：金属研究所
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