Processing map of Al2O3 particulate reinforced Al alloy matrix composites
Processing map of Al2O3 particulate reinforced Al alloy matrix composites
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DOI：
10.1016/j.msea.2012.07.092
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发表时间：
2012-12
期刊：
影响因子：
6.4
通讯作者：
Yongbiao Yang;Zhi Min Zhang;Xing Zhang
中科院分区：
文献类型：
--
作者：
Yongbiao Yang;Zhi Min Zhang;Xing Zhang
在Gleeble-1500机上研究了纳米Al_2O_3颗粒增强铝基复合材料在应变速率为0.001-1s−1的温度范围内的流变应力行为。结果表明，流动应力随应变速率的增加和温度的降低而增大。变形后的复合材料在温度360~440℃和应变速率0.001~0.01s−1范围内表现出动态回复特征，而在480℃变形时表现出动态再结晶特征。得到了应变为0.4时的加工图，得到了3个安全变形区域：0.001-0.01s−1下的360-400℃，0.001-1s−1下的400-440℃，0.001-0.01s−1下的440-480°C。根据加工图和金相组织观察，确定了最佳的热加工工艺参数为480℃/0.001s−1。
The flow stress behavior of the nanometric Al2O3particulate reinforced Al alloy matrix composites were investigated in the temperature range from 360 to 480°C, with strain rates of 0.001–1s−1on Gleeble-1500 machine. The results show that the flow stress increases with increasing strain rate and decreasing temperature. The flow stress of this deformed composites shows a dynamic recovery character in the temperature range from 360 to 440°C and in the strain rate range of 0.001–0.01s−1, while that deformed at 480°C shows dynamic recrystallization character. The processing map at the strain of 0.4 is obtained and exhibits three safe deformation domains: 360–400°C at 0.001–0.01s−1, 400–440°C at 0.001–1s−1, and 440–480°C at 0.001–0.01s−1. According to the processing map and microstructure observation, the optimum hot-working parameters are determined to be 480°C/0.001s−1.