Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5020091 | Additive Manufacturing | 2017 | 11 Pages |
Abstract
In this paper the heat transfer and residual stress evolution in the direct metal laser sintering process of the additive manufacturing of titanium alloy products are studied. A numerical model is developed in a COMSOL multiphysics environment considering the temperature-dependent material properties of TiAl6V4. The thermo-mechanical coupled simulation is performed. 3-D simulation is used to study single-layer laser sintering. A 2-D model is used to study the multi-layer effects of additive manufacturing. The results reveal the behavior of the melt pool size, temperature history, and change of the residual stresses of a single layer and among the multiple layers of the effects of the change of the local base temperature and laser power etc. The result of the simulation provides a better understanding of the complex thermo-mechanical mechanisms of laser sintering additive manufacturing processes.
Keywords
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Physical Sciences and Engineering
Engineering
Industrial and Manufacturing Engineering
Authors
Xinran Zhao, Akshay Iyer, Patcharapit Promoppatum, Shi-Chune Yao,