摘要
通过室温包套挤压,使镁合金产生不同应变量的预应变,从而获得具有不同孪晶比例的组织,并对预应变合金的拉伸及压缩性能进行了测试。结果表明:随着预应变变形量的增加,组织中的{1011}压缩孪晶的数量越来越多,材料的拉伸和压缩性能都明显提高,而且预应变样品拉伸过程中的屈服强度明显高于压缩过程中的屈服强度。这表明由于预应变的施加,在压缩过程中产生了包辛格效应,使材料在反向压缩过程中的屈服强度明显降低;另一方面,计算所得包辛格效应的能量参数(BEP)值随着应变量的增加而逐渐减小,表明随着应变量增加包辛格效应逐渐减弱。
By package extrusion at room temperature,the magnesium alloy was pre-strained with different strain rates,and microstructure with different twinning ratio was obtained,and tensile and compressive properties of the pre-strained alloy were tested. The results show that with the increase of pre-straining,the number of {1011} compression twins in the structure are increasing,the tensile and compression properties are significantly improved,and the yield strength of pre-strained sample during tensile test is higher than that of during compression test. This indicates that due to the pre-straining,the Bauschinger effect has been generated during the compression process,which result in significant decrease of the yield strength during reverse compression. On the other hand,the calculated Bauschinger effect energy parameter（BEP） decreases with strain increasing that means Basinger effect gradually weakened.
出处
《金属热处理》
CAS
CSCD
北大核心
2017年第3期108-112,共5页
Heat Treatment of Metals
关键词
AZ31镁合金
包套挤压
孪晶
包辛格效应
AZ31 magnesium alloys
package extrusion
crystal twin
Bauschinger effect
作者简介
张辉（1990-），男，硕士研究生，主要从事镁合金的研究，E-mail：523903199@qq．com。
通讯作者：张真，博士，副教授，联系电话：0551-62901362，E-mail：turkeyzz@126．com
