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采用Zr_(55)Cu_(30)Al_(10)Ni_5非晶合金孕育剂对ZL205合金进行了变质处理,研究了未变质和变质ZL205合金在不同温度和应变速率时的高温力学性能,探讨了变质处理对ZL205合金高温变形机制的影响。结果表明,变质ZL205合金的应力和断裂应变都有提高;随着变形温度的升高,ZL205合金的应力敏感性呈现逐渐增加的趋势,且变质ZL205合金的应力敏感性要高于未变质的。ZL205合金的高温变形机制为位错攀移机制;变质ZL205合金在不同的温度和应变速率下的纳米级析出相的数量更多、尺寸更小,分布也更加均匀,且相同变形温度下变质ZL205合金的热变形激活能都要高于未变质的。
ZL205 alloy was modified by Zr_ (55) Cu_ (30) Al_ (10) Ni_5 amorphous alloy inoculant. The mechanical properties of ZL205 alloy at different temperatures and strain rates were investigated. Effect of Treatment on High Temperature Deformation Mechanism of ZL205 Alloy. The results show that the stress and fracture strain of ZL205 alloy increase. With the increase of deformation temperature, the stress sensitivity of ZL205 alloy increases gradually, and the stress sensitivity of the modified ZL205 alloy is higher than that of the unmodified alloy. The mechanism of high temperature deformation of ZL205 alloy is dislocation climbing mechanism. The amount of nano-scale precipitation phase of ZL205 alloy at different temperature and strain rate is more, the size is smaller, the distribution is more uniform, and the ZL205 alloy is degenerated at the same deformation temperature Alloy thermal deformation activation energy should be higher than the non-metamorphic.