作者
Jin Fu, Shuo Qu, Junhao Ding, Xu Song, MW Fu
发表日期
2021/8/1
期刊
Additive Manufacturing
卷号
44
页码范围
102067
出版商
Elsevier
简介
Micro laser powder bed fusion (μLPBF) technology offers great benefits to industries as it enables fabrication of complicated metallic components with greater accuracy and minimum feature size as small as 50 µm. Employing finer laser beam and smaller metal powder in μLPBF leads to many variations from the conventional LPBF (cLPBF) in terms of microstructure, mechanical properties and distortion, which have not yet been well understood. This work provides a comparative study of the μLPBF and cLPBF of the well-known material, stainless steel 316 L based on the surface quality, crystal structure, solidification microstructure, tensile properties and distortion of as-printed parts, and their sensitivities to μLPBF process parameters are also studied. Results show that lower surface roughness (Ra= 3.4 µm for top surfaces) is obtained after μLPBF. Stronger < 110 > texture along building direction is developed in the …
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