The low‐cycle fatigue tests of the specimen, which was composed of half composites reinforced by aluminium borate whisker (ABOw) and half unreinforced matrix alloys, were performed under different temperatures. The results showed that the specimen exhibited obvious cyclic hardening at low temperature while increasingly remarkable cyclic softening with the increase of temperature. Meanwhile, the micromorphology of the fracture surface revealed apparent brittle characteristics at low temperature but dominated ductile characteristics at high temperature. The analysis of curves of total strain amplitude versus fatigue life indicated that the dominant fatigue damage mechanism changed from the elastic damage to the plastic damage with the increase of total strain amplitude. In addition, the description of fatigue behaviours based on energy criterion suggested that the capacities of specimen to absorb and dissipate plastic strain energy improved with increasing of temperature but may also be weakened by the strengthening effect of composite part.

中文翻译：

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复合材料（Al-12Si / ABOw）和基体Al-12Si合金组成的试样的低周疲劳行为的实验研究

样品的低周疲劳测试是在不同温度下进行的，该样品由一半由硼酸铝晶须（ABOw）增强的复合材料和一半未增强的基体合金组成。结果表明，试样在低温下表现出明显的循环硬化，而随着温度的升高而表现出明显的循环软化。同时，断裂表面的微观形态在低温下表现出明显的脆性，而在高温下则表现出支配性。总应变幅值对疲劳寿命曲线的分析表明，随着总应变幅值的增加，主要的疲劳损伤机理从弹性损伤变为塑性损伤。此外，