Temperature and Stress Dependence of Occurrence of Strain Burst in Cyclic Creep of AI-Mg Alloy  

作　　者：朱世杰 阳志安 王中光 

机构地区：[1]State Key Laboratory for Fatigue and Fracture of Materials,Institute of Metal Research,Shenyang,110015,China To whom correspondence should be addressed [2]State Key Laboratory for Fatigue and Fracture of Materials,Institute of Metal Research,Shenyang,110015,China

出　　处：《Journal of Materials Science & Technology》1992年第3期177-180,共4页材料科学技术（英文版）

摘　　要：Cyclic creep tests of Al-Mg alloy have been conducted at a wide range of stress and temperature.When Mg content is beyond 0.45%, the strain bursts can be observed in the cyclic creep curves.There exists a critical stress for the occur- rence of the strain burst,which increases with an in- crease of Mg content and is almost 60% of the ul- timate tensile stress.The occurrence of strain burst is proposed to be controlled by the easiness of the cross-slip of dislocations.For Al-Mg alloy,the dynamic strain aging plays an important role in the strain bursts.Cyclic creep tests of Al-Mg alloy have been conducted at a wide range of stress and temperature.When Mg content is beyond 0.45%, the strain bursts can be observed in the cyclic creep curves.There exists a critical stress for the occur- rence of the strain burst,which increases with an in- crease of Mg content and is almost 60% of the ul- timate tensile stress.The occurrence of strain burst is proposed to be controlled by the easiness of the cross-slip of dislocations.For Al-Mg alloy,the dynamic strain aging plays an important role in the strain bursts.

关 键 词：cyclic creep Al-Mg alloy strain burst CROSS-SLIP 

分 类 号：TB3-55[一般工业技术—材料科学与工程]