|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation
||In-situ Characterization of Plasticity Mechanisms along Complex Stain Paths
||Emeric Plancher, Ke Qu, Nicolaas Vonk, Cem Tasan
|On-Site Speaker (Planned)
Most metal forming processes involve complex strain paths and changing stress states. For such loadings, little insight is available regarding micro-mechanisms of plasticity and damage of multi-phase materials. This is largely due to the absence of experimental methods that enable the study of these phenomena. As a result, most in situ micro-mechanical studies supported by advanced characterization techniques focus on uniaxial tension. Here, we developed a bulge test apparatus to carry out quasi-in situ experiments along complex strain paths on 0.1mm-thick films. We employ this setup and multi-field mapping techniques to study plasticity and damage mechanisms in advanced high strength steels (AHSS). Multi-field mapping provides insights into the local mechanical behavior by the integrated use of digital image correlation and electron backscatter diffraction and electron contrast imaging. The results reveal a strong dependence of damage micro-mechanisms to strain path effects, which explain some macro-scale phenomena regarding forming limits of AHSS.
||Planned: Supplemental Proceedings volume