|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Mechanical Behavior of Nanostructured Materials
||L-160: Effects of the Processing Variables on Microstructural Homogeneity Manufactured by High Pressure Double Torsion
||Mohammad Jahedi, Irene J. Beyerlein, Marko Knezevic
|On-Site Speaker (Planned)
Electron backscatter diffraction and transmission electron microscopy were utilized to study the grain refinement and the uniformity in the evolution of microstructure in commercial purity Cu samples during high-pressure double torsion (HPDT). For both processes, grain sizes decrease with the number of turns and applied pressure. It is found that HPDT provided a more homogeneous grain structure than HPT. In addition, more homogeneous grain structure is achieved by a larger number of turns. However, the rate of grain refinement substantially increases with increasing pressure. As a result, the HPDT process, compared to HPT, takes better advantage of the role that high pressure plays in shear strain induced grain refinement and homogenizing the microstructure. Estimating the applied work finds that the least amount of work required for achieving fine and homogeneous microstructure when the applied pressure is maximized and number of turns is minimized.
||Planned: Supplemental Proceedings volume