Bochnia Jerzy, Kozior Tomasz, Zyz Jarosław
Faculty of Mechatronics and Mechanical Engineering, Kielce University of Technology, 25-314 Kielce, Poland.
Materials (Basel). 2023 Jun 29;16(13):4699. doi: 10.3390/ma16134699.
The aim of this study was to explore the mechanical properties of thin-walled maraging steel (MS1) elements fabricated using direct metal laser sintering (DMLS). This article first explains the fabrication procedure and then analyzes the results of the static tensile strength tests and microscopic (SEM) examinations. From this study, it is evident that the mechanical properties of such objects, particularly their tensile strength, are not affected by the build direction; no significant anisotropy was found. The experiments confirm, however, that the mechanical properties of thin-walled elements fabricated from MS1 by DMLS are largely dependent on thickness. The microscopic images of such elements show local discontinuities in the macrostructure of the molten material (powder). Although the research described here mainly contributes to the field of additive manufacturing, it also considers some aspects of Lean manufacturing.
本研究的目的是探索采用直接金属激光烧结（DMLS）制造的薄壁马氏体时效钢（MS1）构件的力学性能。本文首先解释了制造过程，然后分析了静态拉伸强度试验和微观（SEM）检查的结果。从这项研究中可以明显看出，此类物体的力学性能，特别是其拉伸强度，不受构建方向的影响；未发现明显的各向异性。然而，实验证实，通过DMLS由MS1制造的薄壁构件的力学性能在很大程度上取决于厚度。此类构件的微观图像显示了熔融材料（粉末）宏观结构中的局部不连续性。尽管这里描述的研究主要为增材制造领域做出了贡献，但它也考虑了精益制造的一些方面。
