Study on Mechanism of Structure Angle on Microstructure and Properties of SLM-Fabricated 316L Stainless Steel.
Xiaofeng Li,Yi Denghao,Xiaoyu Wu,Jinfang Zhang,Xiaohui Yang,Zixuan Zhao,Wang Jianhong,Bin Liu,Peikang Bai +8 more
TLDR
In this article, seven 316L stainless steel bulks with different angles (0°, 15°, 30°, 45°, 60°, 75°, and 90°) relative to a build substrate were built via selective laser melting (SLM).Abstract:
In this study, seven 316L stainless steel (316L SS) bulks with different angles (0°, 15°, 30°, 45°, 60°, 75°, and 90°) relative to a build substrate were built via selective laser melting (SLM). The influences of different angles on the metallography, microstructure evolution, tensile properties, and corrosion resistance of 316L SS were studied. The 0° sample showed the morphology of corrugated columnar grains, while the 90° sample exhibited equiaxed grains but with a strong texture. The 60° sample had a good strength and plasticity: the tensile strength with 708 MPa, the yield strength with 588 MPa, and the elongation with 54.51%. The dislocation strengthening and grain refinement play a vital role in the mechanical properties for different anisotropy of the SLM-fabricated 316L SS. The 90° sample had greater toughness and corrosion resistance, owing to the higher volume fraction of low-angle grain boundaries and finer grains.read more
Citations
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Predicting anisotropic behavior of textured PBF-LB materials via microstructural modeling
TL;DR: In this paper , two RVE modeling techniques, based on different texture sampling algorithms, have been compared for their property prediction capabilities, and an efficient method to rotate the boundary conditions for tensile test simulations under different loading directions was developed, thereby reducing the required number of RVE models to just one.
References
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Peter Mercelis,Jean-Pierre Kruth +1 more
TL;DR: In this paper, a simple theoretical model is developed to predict residual stress distributions in selective laser sintering (SLS) and selective laser melting (SLM), aiming at a better understanding of this phenomenon.
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TL;DR: In this paper, the effect of the MPBs on microscopic slipping, macroscopic ductility and fracture mechanism of the SLM parts made along different directions, which were analyzed and evaluated using slip theory and experiments.
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Bone-like crack resistance in hierarchical metastable nanolaminate steels
Motomichi Koyama,Zhao Zhang,Meimei Wang,Meimei Wang,Dirk Ponge,Dierk Raabe,Kaneaki Tsuzaki,Hiroshi Noguchi,Cemal Cem Tasan +8 more
TL;DR: It is shown here that when steel microstructures are hierarchical and laminated, similar to the substructure of bone, superior crack resistance can be realized and the exceptional properties enabled by this strategy provide guidance for all fatigue-resistant alloy design efforts.