|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals, and Materials
||Verification of the Predicted Martensitic Transformation in a Au-Cu-Zn Alloy
||Michael Chapman, Marc DeGraef
|On-Site Speaker (Planned)
Au30Cu25Zn45 is a shape memory alloy with a composition that has been optimized to achieve a low hysteresis martensitic transformation by increasing the compatibility between the two phases. The alloy exhibits a unique transformation, but experimental verification of the crystallography of the transformation is still necessary. In this work, we use EBSD to verify the crystallographic orientation. Since the initial austenite phase is known, two secondary methods can theoretically be used to verify the transformation. First, is measuring the surface topography change and extracting the lattice distortions to match to a specific martensite variant. This is a challenging in-situ measurement because the transformation occurs at -50°C and the variant configuration changes in each transformation cycle. A novel method utilizing the EBSD camera was developed for this. The second method utilizes in-situ DIC to measure the variant transformation strains.
||Planned: A print-only volume