半固态连接不锈钢-铝合金界面断裂性能分析  

Analysis of Fracture Properties on Bonding Interface of Semi Solid Joining Stainless Steel-aluminum Alloy Clad

作　　者：刘洪伟[1] 郭成[1] 程羽[1] 刘旭峰[2] 邵光杰[2] 

机构地区：[1]西安交通大学机械工程学院,陕西西安710049 [2]上海大学上海汽车金属材料研究中心,上海200072

出　　处：《材料科学与工程学报》2007年第2期172-174,共3页Journal of Materials Science and Engineering

摘　　要：采用半固态连接技术制备了不锈钢-铝合金双金属材料,参照ASTM-E813标准,对这种双金属材料界面断裂行为进行了试验及数值分析,以KIC为评价指标,对不锈钢-半固态铝合金界面与铝合金基体的断裂韧性进行了比较。研究结果表明:采用三点弯曲实验方法,可以显著降低界面裂纹尖端的复杂应力水平;半固态连接不锈钢-半固态铝合金界面断裂为典型的脆性断裂,界面临界断裂韧性略低于基体铝合金的断裂韧性。The clad material of stainless steel and aluminum alloy is fabricated by semi solid joining method, according with ASTM- E813, three point bending test is carried out, and the fracture behavior of bonding interface is studied with FEM and theory analysis. The results show that the level of compound stress is relived with the three point bending method, brittle fracture occurs at the clad interface and fracture toughness of the interface is slightly lower than that of the bulk aluminum alloy.

关 键 词：半固态连接 双金属材料 界面断裂 三点弯曲 断裂韧性 

分 类 号：TG113[金属学及工艺—物理冶金]