对纯度为99.9995%的高纯铝进行了累积变形量为60%的冷轧变形,并对变形的高纯铝进行了不同温度下的退火处理。采用宏微观分析以及硬度测试等手段,研究了变形高纯铝在热处理时的组织性能演变。结果表明,99.9995%的高纯铝经冷轧累计变形60...对纯度为99.9995%的高纯铝进行了累积变形量为60%的冷轧变形,并对变形的高纯铝进行了不同温度下的退火处理。采用宏微观分析以及硬度测试等手段,研究了变形高纯铝在热处理时的组织性能演变。结果表明,99.9995%的高纯铝经冷轧累计变形60%后未发生动态再结晶,经50℃×30 m in退火后高纯铝变形组织已经开始再结晶,经200℃×30 m in高纯铝变形组织再结晶完全。展开更多
Fine-grain Mg95.50Zn3.71Y0.79 alloy was prepared by high pressure solidification.By comparison with the conventional casting alloy,the true stress-strain curve characteristic and deformation microstructure of Mg95.50Z...Fine-grain Mg95.50Zn3.71Y0.79 alloy was prepared by high pressure solidification.By comparison with the conventional casting alloy,the true stress-strain curve characteristic and deformation microstructure of Mg95.50Zn3.71Y0.79 alloy solidified under high pressure were studied via unilateralism compress tests under the strain rate of 0.001–1 s–1 and deformation temperature of 523–623 K.Constitutive equations were constructed.According to the experimental results,compared to the conventional casting alloy,the true stress-strain curve of the fine-grain alloy solidified under high pressure not only had the high strain hardening characteristic but the dynamic recrystallization softening after the peak stress was more than the working hardening and would soon reach a stable flow stress- strain state.The deformation activation energy of the alloy solidified under high pressure was 151 kJ/mol,around 49 kJ/mol lower than that of the conventional casting alloy.The fine-grain Mg-Zn-Y alloy solidified under high pressure could obtain 95 percent of dynamic recrystallization grain at 573 K during hot deformation process.展开更多
文摘对纯度为99.9995%的高纯铝进行了累积变形量为60%的冷轧变形,并对变形的高纯铝进行了不同温度下的退火处理。采用宏微观分析以及硬度测试等手段,研究了变形高纯铝在热处理时的组织性能演变。结果表明,99.9995%的高纯铝经冷轧累计变形60%后未发生动态再结晶,经50℃×30 m in退火后高纯铝变形组织已经开始再结晶,经200℃×30 m in高纯铝变形组织再结晶完全。
基金Project supported by National Natural Science Foundation of China （51475486） and Hebei Province Natural Science Fund （E2013501096）
文摘Fine-grain Mg95.50Zn3.71Y0.79 alloy was prepared by high pressure solidification.By comparison with the conventional casting alloy,the true stress-strain curve characteristic and deformation microstructure of Mg95.50Zn3.71Y0.79 alloy solidified under high pressure were studied via unilateralism compress tests under the strain rate of 0.001–1 s–1 and deformation temperature of 523–623 K.Constitutive equations were constructed.According to the experimental results,compared to the conventional casting alloy,the true stress-strain curve of the fine-grain alloy solidified under high pressure not only had the high strain hardening characteristic but the dynamic recrystallization softening after the peak stress was more than the working hardening and would soon reach a stable flow stress- strain state.The deformation activation energy of the alloy solidified under high pressure was 151 kJ/mol,around 49 kJ/mol lower than that of the conventional casting alloy.The fine-grain Mg-Zn-Y alloy solidified under high pressure could obtain 95 percent of dynamic recrystallization grain at 573 K during hot deformation process.
