首页|Tensile properties of hot rolled Mg_(97)Zn_1Y_2 alloy sheets at elevated temperatures
Tensile properties of hot rolled Mg_(97)Zn_1Y_2 alloy sheets at elevated temperatures
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The elevated temperature tensile properties of Mg_(97)Zn_1Y_2 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 Mg_(97)Zn_1Y_2 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 Mg_(97)Zn_1Y_2 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 Mg_(97)Zn_1Y_2 magnesium alloy sheets increases slightly with increasing testing temperature.
magnesium alloytensile propertieselevated temperature
SU Zhen-guo、NIU Xiao-dong、AN Jian、LI Guang-yu
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Key Laboratory of Automobile Materials, Ministry of Education,Department of Materials Science and Engineering, Jilin University, Changchun 130025, China
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