Tensile properties of hot rolled Mg₉₇Zn₁Y₂ alloy sheets at elevated temperatures

来源期刊：中国有色金属学报(英文版)2010年第1期

论文作者：苏振国 牛晓冬 安健 李光玉

文章页码：43 - 46

Key words：magnesium alloy; tensile properties; elevated temperature

Abstract: The elevated temperature tensile properties of Mg₉₇Zn₁Y₂ magnesium alloy sheets, hot rolled at 390, 420 and 450 ℃ respectively, were tested in a temperature range from room temperature to 250 ℃ with a strain rate of 1.0×10^-3 s^-1. The results show that the variations in yield strength for Mg₉₇Zn₁Y₂ magnesium alloy sheets hot rolled at 390 ℃ and 420 ℃ with temperature resemble each other due to their similar morphology of the chain-shaped strengthening phase. The yield strength maintains at a high level of 283 MPa before 200 ℃ and decreases significantly at 250 ℃. Despite of the fine lamellar structure of Mg₉₇Zn₁Y₂ magnesium alloy sheet hot rolled at 450 ℃, its yield strength decreases linearly owing to occurrence of the coarse grain, and drops to 239 MPa at 250 ℃. The elongation for all hot rolled Mg₉₇Zn₁Y₂ magnesium alloy sheets increases slightly with increasing testing temperature.

基金信息：the National Science and Technology Support Program during the 10th Five-Year Plan of China