摘要
The mechanical properties of AZ31B magnesium alloy tube were tested by ring hoop tension test at different temperatures. The formability for tube hydroforming was also evaluated by flee-expansion test.The results show that there exists a quick decrease of total elongation along hoop direction at the temperature range of 150-230℃,which is quite different from that along axial direction.The total elongation along hoop direction of welded tube is quite close to that of seamless tube until 230℃is reached.At higher temperature,the total elongation for seamless tube begins to increase while the value for welded tube continues to decrease. The maximum free expansion ratio of seamless tube increases considerably as temperature increases and reaches the maximum value of 30%at 170℃,then decreases quickly at higher temperature.
The mechanical properties of AZ31B magnesium alloy tube were tested by ring hoop tension test at different temperatures. The formability for tube hydroforming was also evaluated by free-expansion test. The results show that there exists a quick decrease of total elongation along hoop direction at the temperature range of 150-230 ℃, which is quite different from that along axial direction. The total elongation along hoop direction of welded tube is quite close to that of seamless tube until 230 ℃ is reached. At higher temperature, the total elongation for seamless tube begins to increase while the value for welded tube continues to decrease. The maximum free expansion ratio of seamless tube increases considerably as temperature increases and reaches the maximum value of 30% at 170 ℃, then decreases quickly at higher temperature.
出处
《中国有色金属学会会刊：英文版》
CSCD
2008年第A01期209-213,共5页
Transactions of Nonferrous Metals Society of China
基金
Project(2006BAE04B03)supported by the National Key Technology Support Program
Project(20070410901)supported by ChinaPostdoctoral Science Foundation
关键词
AZ31B合金
镁合金
热处理
蠕变性能
magnesium alloy tube
elongation
hydroformability
free-expansion test
