A critical test of twin-induced softening in a magnesium alloy extruded to a strain of 0.7 at room temperature

作者：Zhang, Zhen^*; Cizek, Pavel; Barnett, Matthew

来源：Scripta Materialia, 2012, 67(12): 1015-1018.

DOI：10.1016/j.scriptamat.2012.09.021

• Magnesium alloys
• Twinning
• Texture
• Work hardening

Ambient extrusion was used to impart different uniaxial strains to a magnesium alloy. The aim was to test the idea that texture change at high strains can lead to work softening. Tensile tests, optical microscopy, X-ray diffraction and transmission electron microscopy were used to investigate the flow stress, microstructure and texture evolution up to a uniaxial strain of similar to 0.7. The microstructure after extrusion is dominated by contraction twinning, which served to weaken the basal texture. However, no softening was observed; global work hardening persisted.

• 出版日期2012-12
• 单位中南大学; 迪肯大学