期刊文献+

Effect of current pulses on fracture morphology in superplastic deformation of 2091 Al Li alloy 被引量:3

Effect of current pulses on fracture morphology in superplastic deformation of 2091 Al Li alloy
下载PDF
导出
摘要 The effect of current pulses on the fracture morphology in the superplastic deformation of 2091 Al Li alloy at two kinds of initial strain rate ( 1=3.33×10 -3 s -1 ; 2=3.33×10 -2 s -1 ) was investigated.Experimental results show that current pulse turns fracture of superplastic deformation at low strain rate from local interior fracture morphology to typical fracture by growth and interlinkage of cavities, and at high strain rate from rough grain boundary surface to smooth grain boundary surface. It is indicated that the characteristic, that current pulse promotes atomic diffusion, maintains an equiaxial grain microstructure at low strain rate, and accelerates the development of diffusional type of cavity and relaxes stress concentration at triple junction of grain boundaries at high strain rate, and makes the superplastic deformation at two kinds of strain rate show a normal superplastic fracture morphology. The effect of current pulses on the fracture morphology in the superplastic deformation of 2091 Al-Li alloy at two kinds of initial strain rate (epsilon(1) = 3.33 x 10(-3) s(-1); epsilon(2) = 3.33 x 10(-2) s(-1)) was investigated. Experimental results show that current pulse turns fracture of superplastic deformation at low strain rate from local interior fracture morphology to typical fracture by growth and interlinkage of cavities, and at high strain rate from rough grain boundary surface to smooth grain boundary surface. It is indicated that the characteristic, that current pulse promotes atomic diffusion, maintains an equiaxial grain microstructure at low strain rate, and accelerates the development of diffusional type of cavity and relaxes stress concentration at triple junction of grain boundaries at high strain rate, and makes the superplastic deformation at two kinds of strain rate show a normal superplastic fracture morphology.
出处 《中国有色金属学会会刊:英文版》 EI CSCD 1999年第3期514-518,共5页 Transactions of Nonferrous Metals Society of China
关键词 AL LI ALLOY SUPERPLASTIC DEFORMATION FRACTURE morphologyDocument code: A Al-Li alloy superplastic deformation fracture morphology
  • 相关文献

同被引文献37

引证文献3

二级引证文献10

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部