Simultaneously enhanced strength and ductility of Mg-Zn-Zr-Ca alloy with fully recrystallized ultrafine grained structures

作者：Zheng Ruixiao^*; Bhattacharjee Tilak; Shibata Akinobu; Sasaki Taisuke; Hono Kazuhiro; Joshi Mohit; Tsuji Nobuhiro

来源：Scripta Materialia, 2017, 131: 1-5.

DOI：10.1016/j.scriptamat.2016.12.024

• Magnesium alloy
• Ultrafine grain
• High pressure torsion
• Strength Ductility

Fully recrystallized ultrafine grained (UFG) Mg-Zn-Zr-Ca alloy was successfully fabricated by a process including high pressure torsion (HPT) and subsequent rapid annealing treatment. After the HPT by one rotation, a nano crystalline (NC) structure with an average grain size of about 100 nm and deformed characteristics was obtained. After subsequent annealing at 300 degrees C and 400 degrees C for 1 min, fully recrystallized UFG structures with average grain sizes of 0.77 mu m and 0.98 mu m were obtained, respectively. Room temperature tensile test revealed that the UFG Mg alloy exhibited simultaneously enhanced strength and ductility compared with those of the coarse grained counterpart.

• 出版日期2017-4-1