作者
A Leicht, M Rashidi, U Klement, E Hryha
发表日期
2020/1/1
期刊
Materials Characterization
卷号
159
页码范围
110016
出版商
Elsevier
简介
The influence of process parameters during laser-powder bed fusion on the microstructure, tensile strength and build time of 316L parts is studied. By increasing both, scan speed and hatch distance, an improved productivity while maintaining acceptable properties were achieved. The samples were evaluated using volumetric energy density. The microstructure characterization showed that all produced samples had elongated grains aligned with the building direction independent on energy density that was used, whereas the grain size was strongly affected by the different energy densities. A high energy density resulted in larger grains with a very strong <101> crystallographic orientation while the lower energy generated small grains with a random crystallographic orientation. This indicates how both, crystallographic orientation and grain size, can be tailored by altering the energy density. Even if a large …
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