On some aspects of compressive properties and serrated flow in Mg-Y-Nd-Zr alloy
来源期刊：JOURNAL OF RARE EARTHS2013年第8期
论文作者：H.Azzeddine D.Bradai
文章页码：804 - 810
摘 要：The deformation behavior of the Mg-Y-Nd-Zr （WE54） alloy at temperatures between 25 and 400 ℃ was investigated by uniaxial and plans strain compression tests at strain rate values of 10-2 and 10-4s-1 . The results showed that the flow stress had a strong dependency on the loading condition. Yield stress and peak stress decreased with increasing deformation temperature and with decrease in the strain rate for both deformation types. The serration flow behavior was observed markedly at high temperatures and under a strain rate of 10-4s-1 . The serration amplitude for samples deformed by plans strain compression was larger than that by uniaxial compression. Serrated flow was attributed to the interaction of dislocations with precipitates at 300 ℃ and to dynamic discontinuous recrystallization effects at 400 ℃.
H.Azzeddine，D.Bradai
Faculty of Physics, University of Sciences and Technology Houari Boumediene,BP32, El-Alia, Bab Ezzouar 16111 Algiers, Algeria
摘 要：The deformation behavior of the Mg-Y-Nd-Zr （WE54） alloy at temperatures between 25 and 400 ℃ was investigated by uniaxial and plans strain compression tests at strain rate values of 10-2 and 10-4s-1 . The results showed that the flow stress had a strong dependency on the loading condition. Yield stress and peak stress decreased with increasing deformation temperature and with decrease in the strain rate for both deformation types. The serration flow behavior was observed markedly at high temperatures and under a strain rate of 10-4s-1 . The serration amplitude for samples deformed by plans strain compression was larger than that by uniaxial compression. Serrated flow was attributed to the interaction of dislocations with precipitates at 300 ℃ and to dynamic discontinuous recrystallization effects at 400 ℃.
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