Cavity characteristics of cast-rolling AZ31 magnesium alloy during hot deformation
The cavity characteristics of roll-casting AZ31 magnesium alloy during deformation was analyzed by Gleeble 1500,optical mi croscopy (OM) and scanning electron microscopy (SEM). The sheet was deformed by tensile experiment at the temperature of 200～400 ℃ and strain rates of 0.004 and 0.0004 s~-1. The cavity evolution during deformation was investigated by in-suit SEM observation. Distribution of cavity roundness coefficient and cavity diameter was measured. The results showed that the cavity first nucleated at the grain boundary especially at triple points and then grew up by mechanism of diffusion and plasticity. The coalescence of cavity during de formation caused the fracture.
east-rolling AZ31magnesium cavity grain boundary sliding
ZHAO Hu HE Liangju PENG Weiping LI Peijie
Sino-Russian R & D Center for Light Alloys,Tsinghua University,Beijing 100084,China International Research Center for New Materials,Tsinghua University,Beijing 100084,China
国际会议
The 10th China-Russia System on Advanced Materials and Technologies(第十届中俄新材料新工艺研讨会)
浙江嘉兴
英文
184-187
2009-10-20（万方平台首次上网日期，不代表论文的发表时间）