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.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
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
关键词
热机械疲劳
力学行为
铝基复合材料
碳化硅晶须
Al composite, SiC whisker, thermo-mechanical fatigue, mechanical behavior
