Stress state-dependent mechanics of additively manufactured 304L stainless steel: Part 2 – Characterization and modeling of macroscopic plasticity behavior
Stress state-dependent mechanics of additively manufactured 304L stainless steel: Part 2 – Characterization and modeling of macroscopic plasticity behavior
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DOI：
10.1016/j.msea.2018.11.091
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发表时间：
2019-01
期刊：
影响因子：
--
通讯作者：
Zhuqing Wang;A. Beese
中科院分区：
文献类型：
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作者：
Zhuqing Wang;A. Beese
建立了一个描述增材制造304 L不锈钢宏观塑性行为的模型，该模型基于应力状态相关的微观组织马氏体-α'马氏体相变。具体而言，应力状态，纹理，和化学相关的应变诱导马氏体相变动力学方程耦合到各向同性硬化法，以明确链接的宏观应变硬化行为在这种材料的微观结构演变。塑性模型被实施到一个有限元代码，校准使用单轴拉伸，单轴压缩，纯剪切下的实验数据，并使用拉剪组合载荷下的实验数据进行验证。模拟结果与相应的实验数据的所有应力状态的校准和验证研究，表明开发的塑性模型的预测性。
A model that describes macroscopic plasticity behavior of additively manufactured 304L stainless steel, in terms of its stress state-dependent microstructural austenite-to-α’ martensite phase transformation is developed. Specifically, a stress state-, texture-, and chemistry-dependent strain-induced martensitic transformation kinetics equation was coupled to an isotropic hardening law in order to explicitly link the macroscopic strain hardening behavior in this material to its microstructural evolution. The plasticity model was implemented into a finite element code, calibrated using experimental data under uniaxial tension, uniaxial compression, pure shear, and validated using experimental data under combined tension and shear loading. The simulated results were in good agreement with the corresponding experimental data for all stress states studied for calibration and validation, demonstrating the predictiveness of the plasticity model developed.