|About this Abstract
|MS&T21: Materials Science & Technology
|Deformation-induced Phase Transformations
|Accounting for Phase Transformation in Plastic Anisotropy Modeling of SS316L
|Elizabeth Marie Mamros, Jinjin Ha, Yannis P. Korkolis, Brad L. Kinsey
|On-Site Speaker (Planned)
|Yannis P. Korkolis
Plasticity of SS316L was characterized by uniaxial and biaxial tension experiments, including the effect of phase transformation on material behavior. Normalized flow stresses and strain ratios were calculated with respect to plastic work to capture the evolutionary behavior. The results were used to calibrate non-quadratic anisotropic yield function (Yld2004-18p) parameters as a function of equivalent plastic strain. In-plane biaxial tension cruciform experiments were performed to validate the plastic anisotropy model. The model predicted the experiments reasonably well for proportional paths ranging from uniaxial to equibiaxial loading. The resulting martensitic transformation was measured via magnetic induction and validated by electron backscatter diffraction. Alterations to the material properties of austenitic stainless steels resulting from deformation-induced martensitic transformation is of interest for creating heterogeneous biomaterials. By controlling stress superposition, the microstructure can be tailored to the desired material properties for a specific application, e.g., trauma hardware, which has conflicting strength and weight requirements.