Anisotropic multiaxial plasticity model for laser powder bed fusion additively manufactured Ti-6Al-4V
Anisotropic multiaxial plasticity model for laser powder bed fusion additively manufactured Ti-6Al-4V
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DOI：
10.1016/j.msea.2018.09.077
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发表时间：
2018-12-19
期刊：
影响因子：
6.4
通讯作者：
Beese, Allison M.
中科院分区：
文献类型：
--
作者：
Wilson-Heid, Alexander E.;Qin, Shipin;Beese, Allison M.
研究了激光粉末床熔融（L-PBF）增材制造Ti-6Al-4V合金的多轴屈服和塑性流动行为。在单轴拉伸、平面应变拉伸、纯剪切和拉剪复合载荷作用下，对L-PBF Ti-6Al-4V的力学性能进行了评价。力学行为被认为是应力状态依赖性和轻微的各向异性。一个塑性模型，包括希尔1948各向异性屈服准则，相关的流动规则，和各向同性硬化定律进行了校准，并用于描述这种材料的屈服和塑性行为。多轴应力状态下的塑性模型的验证表明，该模型能够预测该材料的应力状态依赖的各向异性塑性行为。
The multiaxial yield and plastic flow behavior of Ti-6Al-4V manufactured in two orientations via laser powder bed fusion (L-PBF) additive manufacturing was investigated. The mechanical properties of L-PBF Ti-6Al-4V were evaluated under uniaxial tension, plane strain tension, pure shear, and combined tension/shear loading. The mechanical behavior was found to be stress state dependent and slightly anisotropic. A plasticity model, consisting of a Hill 1948 anisotropic yield criterion, associated flow rule, and an isotropic hardening law was calibrated and used to describe the yield and plasticity behavior of this material. Validation of the plasticity model under multiaxial stress states demonstrated that the model was able to predict the stress state dependent anisotropic plasticity behavior of this material.