【摘要】 研究了在热循环条件下，硅酸铝短纤维增强的普通活塞铝合金（ＺＬ１０９）复合材料的尺寸稳定性。研究结果表明，热循环能导致样品的尺寸发生变化。随着纤维体积分数的增加，样品的尺寸变形程度明显降低。这是由于纤维与基体之间的热膨胀失配引起的内应力造成了热应变的迟滞，从而导致样品的尺寸变化。更多还原

【Abstract】 Dimensional stability of the conventional piston Al alloy ZL109, reinforced with aluminosilicate short fiber, in thermal cycle was investigated.The results showed that thermal cycle caused residual dimensional changes of the specimens, and with the fiber contents increasing, the extents of dimensional changes decrease obviously. It is considered that inte rnal stresses due to the mismatch in the thermal expansion between fibers and matrix induce thermal strain delay so as to reduce the dimensional changes of the specimens更多还原