Suppressing cold cracking in laser powder bed fused Al-Fe-V-Si alloy using top-hat laser profile
文献类型：期刊论文
| 作者 | Wei, Siyuan1; Huang, Sheng2; Ng, Sarah Jiawen2; Zhang, Long3; Zeng, Yingzhi4; Wang, Pei1,5; Ramamurty, Upadrasta1,2 |
| 刊名 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| 出版日期 | 2025-02-01 |
| 卷号 | 924页码:12 |
| 关键词 | Cold cracking Al alloys Top-hat laser Additive manufacturing Precipitation |
| ISSN号 | 0921-5093 |
| DOI | 10.1016/j.msea.2025.147858 |
| 通讯作者 | Wei, Siyuan(wei_siyuan@imre.a-star.edu.sg) ; Huang, Sheng(sheng007@e.ntu.edu.sg) ; Wang, Pei(wangp@imre.a-star.edu.sg) |
| 英文摘要 | Dispersion-strengthened Al-Fe-V-Si alloy that has high temperature applicability was additively manufactured using the laser powder bed fusion (LPBF) technique with both Gaussian and top-hat laser profiles. The fabricated samples were investigated through multiscale microstructural characterization, hardness mapping, and bulk mechanical testing. The Gaussian laser induced severe cold cracking along the melt pool boundaries, even with extensive parameter optimization and substrate pre-heating up to 200 degrees C. In contrast, the top-hat laser effectively suppressed cold cracking, producing nearly fully dense samples with only 110 degrees C preheating. Transmission electron microscopy analysis identified fine Al12(Fe,V)3Si and coarse h-AlFeSi precipitates in the built part, which were not predicted by the equilibrium and Scheil-Gulliver thermodynamic models, indicating non-equilibrium conditions and complexity in their formation. The brittle coarse precipitates along the melt pool boundaries were identified to be the key cause of cold cracking in the Gaussian laser samples, creating a hardness mismatch between the melt pool boundary and the interior. The top-hat laser created a large heat-affected zone that spanned more than one layer thickness, effectively achieving in-situ "substrate" preheating, which contributed to crack mitigation. |
| 资助项目 | Sinoma Institute of Mate-rials Research[M22K4a0044] |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001402808000001 |
| 出版者 | ELSEVIER SCIENCE SA |
| 资助机构 | Sinoma Institute of Mate-rials Research |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Wei, Siyuan; Huang, Sheng; Wang, Pei |
| 作者单位 | 1.ASTAR, Inst Mat Res & Engn IMRE, 2 Fusionopolis Way,Innovis 08-03, Singapore 138634, Singapore 2.Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore 639798, Singapore 3.Chinese Acad Sci, Inst Met Res, Shi changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 4.ASTAR, Inst High Performance Comp IHPC, 1 Fusionopolis Way,Connexis 16-16, Singapore 138632, Singapore 5.Singapore Inst Technol, Engn Cluster, Singapore 519961, Singapore |
| 推荐引用方式 GB/T 7714 | Wei, Siyuan,Huang, Sheng,Ng, Sarah Jiawen,et al. Suppressing cold cracking in laser powder bed fused Al-Fe-V-Si alloy using top-hat laser profile[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2025,924:12. |
| APA | Wei, Siyuan.,Huang, Sheng.,Ng, Sarah Jiawen.,Zhang, Long.,Zeng, Yingzhi.,...&Ramamurty, Upadrasta.(2025).Suppressing cold cracking in laser powder bed fused Al-Fe-V-Si alloy using top-hat laser profile.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,924,12. |
| MLA | Wei, Siyuan,et al."Suppressing cold cracking in laser powder bed fused Al-Fe-V-Si alloy using top-hat laser profile".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 924(2025):12. |
入库方式： OAI收割
来源：金属研究所
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