应变速率对稀土镁合金动能吸收能力的影响  

Effects of strain rate on the kinetic energy-absorbing capacity of rare earth magnesium alloy

作　　者：赵一生[1,2] 

机构地区：[1]深圳职业技术学院,广东深圳518055 [2]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《兵器材料科学与工程》2011年第3期21-23,共3页Ordnance Material Science and Engineering

摘　　要：采用分离式Hopkinson压杆技术,对稀土镁合金T5态板材试样进行冲击压缩实验,获得不同应变速率下的应力应变曲线。对该曲线进行面积积分,研究应变速率对试样动能吸收能力的影响。结果表明,应变速率对稀土镁合金动能吸收能力影响显著,利用Origin7.0中的非线性拟合工具得到应变速率ε-与动能吸收能力Q呈现非线性关系,Q=-3.36+0.01328ε-+3.89×10-6ε-。Abstract Rare earth magnesium alloy was investigated in dynamic impact test by split Hopkinson pressure bar （SHPB）. The stress-strain curves of rare earth magnesium alloy corresponding to different strain rates were obtained. The effects of strain rate on the kinetic energy-absorbing capacity of rare earth magnesium alloy were investigated by integrating the curves of stressstrain. The results show that a linear relation between strain rate εand kinetic energy-absorbing capacity Q of the alloy is identified as Q=-3.36＋0.013 28 ε ＋3.89×10^-6 ε.

关 键 词：应变速率 镁合金 动能 

分 类 号：TF125.22[冶金工程—粉末冶金]