4.5 Article

Effects of laser energy density on morphology features and microstructures of the single molten track in selective laser melting

期刊

FRONTIERS IN MATERIALS
卷 10, 期 -, 页码 -

出版社

FRONTIERS MEDIA SA
DOI: 10.3389/fmats.2023.1110844

关键词

Selective laser melting; laser energy density; single molten track; morphology features; microstructure

向作者/读者索取更多资源

This study investigated the effects of laser energy density (LED) on the characteristics of single molten tracks (SMT) in the selective laser melting (SLM) process. The results showed that an optimized range of LED between 200 and 500 J/mm(3) achieved the best SLM process for 316L stainless steel, resulting in beautiful SMT appearance and high densification. The relationship between SMT characteristics and LED found in this study can be used to optimize SMT and control microstructures in situ, simplifying guesswork in additive manufacturing.
Single molten track (SMT) is the basic unit of the selective laser melting (SLM) process, of which the morphology features and microstructures have great significance on the molding quality. In this study, the effects of laser energy density (LED) on characteristics of SMT were studied with 316 L stainless steel processing by SLM. The results indicate that an optimized range of LED was between 200 and 500 J/mm(3), which was the best for SLM process of 316 L leading to beautiful SMT appearance such as continuous uniform water-ridge-like surface, good contour straightness, smooth edges, little adhesive powder, and high densification. The microstructures of the SMT molten pool are mainly composed of equiaxed cellular and columnar dendrites. As the LED decreased, the cellular became smaller and disappeared, while the length and width of columnar crystals even gradually increased. The size of the cellular varies between 0.43 and 1.70 mu m with the LEDs increase. The relationship between SMT characteristics and LED found in this work can be readily used to optimize SMT and control the microstructures in situ, and the laser energy density range that the work has identified will simplify most of the guess work in additive manufacturing.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.5
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据