Cai Haoyu, Wang Renche, Wang Tao, Du Shuaishuai, Su Molin
Nanjing Research Institute of Electronics Technology, Nanjing 210039, China.
CNPC Research Institute of Safety & Environment Technology, Beijing 102206, China.
Materials (Basel). 2025 Jun 10;18(12):2720. doi: 10.3390/ma18122720.
The laser-based powder bed fusion of metal (PBF-LB/M) process of 316L stainless steel (SS) was systematically investigated under varying scanning spacings to assess its microstructural and mechanical properties. Optimized laser parameters were employed, and the resulting microstructure and mechanical performance were thoroughly characterized through surface and cross-sectional scanning electron microscopy (SEM), electron backscatter diffraction (EBSD) analysis, fracture surface examination, and tensile testing. The results indicated that a scanning spacing of 0.11 mm produced the most favorable mechanical properties, characterized by a dense microstructure and refined grain morphology. These findings provide critical insights for the optimization of PBF-LB/M process parameters, contributing to the advancement of additive manufacturing techniques for 316L SS.
在不同扫描间距下，对316L不锈钢（SS）基于激光的金属粉末床熔融（PBF-LB/M）工艺进行了系统研究，以评估其微观结构和力学性能。采用了优化的激光参数，并通过表面和横截面扫描电子显微镜（SEM）、电子背散射衍射（EBSD）分析、断口表面检查和拉伸试验，对所得的微观结构和力学性能进行了全面表征。结果表明，0.11mm的扫描间距产生了最有利的力学性能，其特征是微观结构致密且晶粒形态细化。这些发现为PBF-LB/M工艺参数的优化提供了关键见解，有助于推动316L SS增材制造技术的发展。
