The recrystallization textures in 95%rolled aluminum sheets with different purities and initial textures were investigated.The effects of recovery levels and the dragging effects induced by impurities on the effective...The recrystallization textures in 95%rolled aluminum sheets with different purities and initial textures were investigated.The effects of recovery levels and the dragging effects induced by impurities on the effective driving force and corresponding behaviors of oriented nucleation and oriented growth during annealing were analyzed.The oriented nucleation is a common behavior in the initial stage of primary recrystallization if the effective driving force in deformed matrix is not too high to reduce the necessity of nucleation period.Oriented growth might appear if the temperature is not too high and the grains,of which the misorientation to matrix is about 40°〈111〉,have enough time and space to expand growth advantages,while certain reduction of effective driving force is also necessary.The recrystallization textures could be changed by controlling initial textures and effective driving forces which can be regulated by recovery levels and dragging effects.展开更多
对普通中碳钢在轧制过程中各种变形参数对组织演变规律的影响进行了系统的热模拟实验研究。探讨变形参数对形变储存能和组织演变规律的影响,重点考察珠光体球化过程的规律。通过实验数据计算得到变形激活能为262.57 k J·mol-1;形...对普通中碳钢在轧制过程中各种变形参数对组织演变规律的影响进行了系统的热模拟实验研究。探讨变形参数对形变储存能和组织演变规律的影响,重点考察珠光体球化过程的规律。通过实验数据计算得到变形激活能为262.57 k J·mol-1;形变储存能随变形温度降低和变形速率增加而加大,拟合出变形储存能与Z参数的关系式为:ΔGD=252.95-19.24ln Z+0.38(ln Z)2。确定了实验钢发生形变诱导铁素体相变临界形变储存能为24.28 J·mol-1。实验钢形变诱导铁素体含量随变形温度的降低而增加。为中碳钢热变形工艺优化提供了理论依据。展开更多
文摘The recrystallization textures in 95%rolled aluminum sheets with different purities and initial textures were investigated.The effects of recovery levels and the dragging effects induced by impurities on the effective driving force and corresponding behaviors of oriented nucleation and oriented growth during annealing were analyzed.The oriented nucleation is a common behavior in the initial stage of primary recrystallization if the effective driving force in deformed matrix is not too high to reduce the necessity of nucleation period.Oriented growth might appear if the temperature is not too high and the grains,of which the misorientation to matrix is about 40°〈111〉,have enough time and space to expand growth advantages,while certain reduction of effective driving force is also necessary.The recrystallization textures could be changed by controlling initial textures and effective driving forces which can be regulated by recovery levels and dragging effects.
