应变状态下ZL114A铝合金低周疲劳行为的研究  

Research on Low Cycle Fatigue Behaviors of Aluminum Alloy ZL114A

作　　者：刘向东[1] 佟立丰[2] 丰崇友[3] 韩阳阳[1] 张彩霞[1] 陈振[1] 孙红旗[1] 张成军[1] 

机构地区：[1]佳木斯大学,黑龙江佳木斯154007 [2]九江职业技术学院,江西九江332007 [3]嘉兴职业技术学院,浙江嘉兴314036

出　　处：《佳木斯大学学报（自然科学版）》2013年第2期303-305,共3页Journal of Jiamusi University：Natural Science Edition

基　　金：黑龙江省教育厅科研项目(11511381)

摘　　要：在室温应变控制下,对ZL114A铝合金进行了单轴低周疲劳试验研究和显微分析,结果表明:材料在低周载荷下,当循环应变幅值小于0.6%,材料没有表现出循环硬化现象.随着循环应变幅值的增加,材料表现出明显的循环硬化现象;且随着应变幅值的增加材料的附加强化程度增大;应变幅值的大小对ZL114A铝合金低周疲劳寿命有较大影响,随着应变幅值的增大,疲劳寿命降低明显;疲劳损伤断口表现出大量的韧窝和韧性断裂的特征.The low cycle fatigue tests and microscopic analysis of ZLll4A aluminum alloy by controlling the total strain amplitude at room temperature were carried out. Results showed that no cyclic hardening was found in the materials when cycled strain amplitude is less than 0.6%. With the increase of the cyclical strain amplitude, there is obviously cyclic hardening; the additional hardening increase with the strain amplitude. Strain amplitude has a great influence on low cycle fatigue life of the material ： with the increase of strain ampli- tude, the fatigue life decreases. There are a lot of dimples and ductile fracture features on the fatigue fracture.

关 键 词：ZL114A铝合金 低周疲劳 力学性能 显微结构 

分 类 号：TG146.2[一般工业技术—材料科学与工程]