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将Zr_(55)Al_(10)Ni_5Cu_(30)块体非晶合金在715 K等温退火30 min,引入少量纳米晶,然后于室温以不同的应变速率进行轧制,用差示扫描量热仪考察不同应变量样品的热稳定性和自由体积演化.结果表明:即使轧制到95%的最大应变量,样品的热稳定性也几乎没有发生改变.在各种应变速率下,随着应变量的增加,自由体积含量持续上升.但随着应变速率的增加,相同应变量下自由体积的含量先上升后降低,该规律与单一非晶态结构合金在塑性变形过程中自由体积的变化情况截然不同.
A series of Zr55V10 Ni5Cu30 bulk amorphous alloys were isothermally annealed at 715 K for 30 min, and a small amount of nanocrystals were introduced into the samples. The samples were then rolled at different strain rates at room temperature. The samples were characterized by differential scanning calorimeter The thermal stability and free volume evolution of different samples were investigated.The results showed that the thermal stability of the samples almost did not change even after rolling to 95% of the maximum strain.With different strain rates, , The content of free volume continued to increase, but with the increase of strain rate, the content of free volume at the same strain first increased and then decreased, which was in agreement with the change of free volume in single-phase amorphous alloy during plastic deformation different.