|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Magnesium Technology 2017
||I-51: Textural Contributions to Strengthening in Mg-RE Alloy with Nanospaced Stacking Faults
||Heather Salvador, Vishnu Bhattacharyya , Yuntian Zhu, Sean Agnew,
|On-Site Speaker (Planned)
Recent findings in Ti- and Mg-RE alloys have shown high strength when the microstructure is composed of a high-density of stacking faults. The fault formation is posited in part, to be due to the high stresses on boundaries which nucleate the necessary partial dislocations. Deformation to high strains, such as large rolling reductions or severe plastic deformation, is necessary, and suspected to result in textural components that may strongly influence the observed strengthening, however no textural data have been reported in the extant literature. We report on the textural and microstructural evolution in Mg-Gd-Y-Ag-Zr alloy rolled at 450C up to 80% rolling reduction. It is seen that nanospaced stacking faults, and the accompanying high-strength, are only observed at high rolling-reductions, however textural changes are minimal as a function of increased rolling strain. These findings suggest minimal strengthening contributions from texture in hcp systems strengthened by nanoscale faults.