SiC晶须增强6061Al基复合材料的热机械疲劳性能Ⅰ.应力应变行为  

THERMO-MECHANICAL FATIGUE OF SiC WHISKER REINFORCED 6061Al COMPOSITES Ⅰ. Stress and Strain During Cycling

作　　者：钱立和[1] 王中光[1] 户田裕之 小林俊郎 

机构地区：[1]中国科学院金属研究所材料疲劳与断裂国家重点实验室,沈阳1100116 [2]日本丰桥技术科学大学生产系统工程系

出　　处：《金属学报》2001年第11期1198-1202,共5页Acta Metallurgica Sinica

基　　金：国家重点基础研究资助项目 G19990650

摘　　要：对体积分数为１５％和２８％的ＳｉＣＷ／６０６１Ａｌ复合材料进行了同相和反相热机械疲劳（ＴＭＦ）实验，研究了疲劳过程中的应力应变行为和变形机制．结果表明，两种材料在同相和反相加载下均表现为循环软化；反相加载产生拉伸平均应力，同相加载产生压缩平均应力；在相同应变范围下，高体积分数复合材料的循环应力范围比低体积分数复合材料的应力范围大．In-phase and out-of-phase thermo-mechanical fatigue (TMF) experiments were con- ducted on 6061 aluminum alloy reinforced with 15% and 28% (volume fraction) whiskers. The me- chanical behavior and deformation mechanism of both TMF were investigated and discussed. The results show that the two kinds of TMF cycling exhibited continuous cyclic softening, out-of-phase TMF loading gave rise to tensile mean stress, whereas in-phase TMF cycling led to compressive mean stress. It is also demonstrated that at an equivalent strain range, the 28% SiCw/6061Al showed higher stress range than the 15% SiCw/6061Al.

关 键 词：热机械疲劳 力学行为 铝基复合材料 碳化硅晶须 

分 类 号：TB333[一般工业技术—材料科学与工程]