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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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al2o3sf？sicp/al复合材料的压缩变形力学行为及机制
Keywords: 复合材料,压缩变形试验,力学行为,变形
Abstract:
？对al2o3sf？sicp/al复合材料进行高温及半固态区间压缩变形,观察其微观组织和组成,研究了在高温及半固态温度下的压缩变形力学行为和变形机制.al2o3sf？sicp/al复合材料的流动应力随着压缩温度的提高而下降,随着增强体的体积分数、基体材料强度和应变速率的提高而上升.高温压缩使材料屈服后,由于动态回复抵消了材料的加工硬化,其流动应力值基本上保持不变.在半固态温度区间压缩而液相体积分数较低时,其流动应力的变化规律与高温压缩时相似;液相体积分数较高时,流动应力在材料屈服以后,液相的流出使流动应力下降;液相被挤出到侧表面后,流动应力呈上升趋势.复合材料在半固态区间压缩时具有应变速率敏感性.
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