作者
Itziar Serrano-Munoz, Tatiana Mishurova, Tobias Thiede, Maximilian Sprengel, Arne Kromm, Naresh Nadammal, Gert Nolze, Romeo Saliwan-Neumann, Alexander Evans, Giovanni Bruno
发表日期
2020/9/4
期刊
Scientific reports
卷号
10
期号
1
页码范围
14645
出版商
Nature Publishing Group UK
简介
The effect of two types of scanning strategies on the grain structure and build-up of Residual Stress (RS) has been investigated in an as-built IN718 alloy produced by Laser Powder Bed Fusion (LPBF). The RS state has been investigated by X-ray diffraction techniques. The microstructural characterization was performed principally by Electron Backscatter Diffraction (EBSD), where the application of a post-measurement refinement technique enables small misorientations (< 2°) to be resolved. Kernel average misorientation (KAM) distributions indicate that preferably oriented columnar grains contain higher levels of misorientation, when compared to elongated grains with lower texture. The KAM distributions combined with X-ray diffraction stress maps infer that the increased misorientation is induced via plastic deformation driven by the thermal stresses, acting to self-relieve stress. The possibility of obtaining lower …
引用总数
2020202120222023202431717126