摘要
本文利用超声液相法制备的SiC（pcs）束丝纤维增强L2工业纯铝复合丝为试样，对这种复合材料的拉拉应力疲劳性能进行了试验和分析。试验得出其疲劳抗力随着应力循环周次的增加会迅速下降，在循环周次为106次时其疲劳循环最大应力已降至静拉强度的40％左右，约为450MPa。试验中发现在应力循环过程中，试样能被拉长，基体铝也存在循环硬化现象，因此提高基体的力争性能将是提高其疲劳性能的有效途径，在300℃的高温下进行的应力循环疲劳性能试验表明，这种材料的高温疲劳性能与室温相比没有明显的差异。
The tensile fatigue property of SiC(pcs) fiber reinforced L2 aluminum composite wire,fabricated by ultrasonic liquid infiltration, was tested. The test results show that the fatigue resistance will decrease rapidly with the increasing of the stress cycle index. When the cycle index is105, the maximum fatigue cycle stress will decrease to 450MPa, what is about 40% of it's statictensile strength.Specimen elongation and cycle hardening of matrix alumimum was detected duringfatigue test. Improving the mechanical property of the matrix metal is an effective way to improvethe fatigue property of the wire. The results of cycle stress fatigue test at 300℃ show that there isno clear distinction between the fatigue properties at high temperature and those at room temperature.
出处
《宇航材料工艺》
CAS
CSCD
北大核心
1997年第1期53-56,共4页
Aerospace Materials & Technology
关键词
金属基
复合材料
碳化硅纤维
疲劳
Metal matrix composite, Silicon carbide fiber, Fatigue behavious
