Hot deformation of Mg-Y-Zn alloy with a low content of the LPSO phase studied by in-situ synchrotron radiation diffraction

• 作者: Andreas Stark Daria Drozdenko Domonkos Tolnai Gerardo Garcés Jan Capek Klaudia Horváth Fekete Kristián Máthis Patrik Dobron
• 来源期刊: 镁合金学报(英文)
• 学科: 工学
• 关键词: Magnesium alloy LPSO phase KINKING High temperature Synchrotron radiation diffraction
• 年，卷（期）: 2020,（1）
• 页码范围: 199-209
• 页数: 11页
• 分类号: TG1

摘要

The compressive deformation behavior of the extruded WZ42(Mg98.5Y1Zn0.5 in at.%)magnesium alloy containing a low amount of long-period stacking ordered(LPSO)phase was studied by in-situ synchrotron radiation diffraction technique.Tests were conducted at temperatures between room temperature and 350℃.Detailed microstructure investigation was provided by scanning electron microscopy,particularly the backscattered electron imaging and electron backscatter diffraction technique.The results show that twinning lost its dominance and kinking of the LPSO phase became more pronounced with increasing deformation temperature.No cracks of the LPSO phase and no debonding r at the interface between the LPSO phase and the Mg matrix were observed at temperatures above 200℃.At 350℃,the LPSO phase lost its strengthening effect and the deformation of the alloy was mainly realized by the dynamic recrystallization of the Mg matrix.