Microstructural evolution of ECAPed 1050 alloy under magnetic annealing
来源期刊：International Journal of Minerals Metallurgy and Materials2014年第12期
论文作者：Yi-heng Cao Pin-feng Jia Kang Wang Li-zi He Ping Wang Jian-zhong Cui
文章页码：1205 - 1214
摘 要：Hardness and microstructure evolutions in 1050 aluminum alloy prepared by equal-channel angular pressing（ECAP） were investigated by hardness testing, optical microscopy, and transmission electron microscopy after samples were annealed at different temperatures for 1 h both in the absence and presence of a 12-T magnetic field. The results showed that the hardness of samples after magnetic annealing were lower than that of samples after normal annealing at 150–250°C, but it was higher than that of samples after normal annealing at >250°C. During annealing, the rate of softening was faster, and the grains were more homogeneous in 8-ECAPed samples than in 2-ECAPed samples. A rapid grain growth occurred when 2-ECAPed samples were annealed at high temperature（≥300°C）. The magnetic field enhanced the mobility of dislocations and grain boundaries. A more homogeneous grain size was observed in samples prepared under an applied magnetic field.
Yi-heng Cao，Pin-feng Jia，Kang Wang，Li-zi He，Ping Wang，Jian-zhong Cui
Key Lab of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University
摘 要：Hardness and microstructure evolutions in 1050 aluminum alloy prepared by equal-channel angular pressing（ECAP） were investigated by hardness testing, optical microscopy, and transmission electron microscopy after samples were annealed at different temperatures for 1 h both in the absence and presence of a 12-T magnetic field. The results showed that the hardness of samples after magnetic annealing were lower than that of samples after normal annealing at 150–250°C, but it was higher than that of samples after normal annealing at >250°C. During annealing, the rate of softening was faster, and the grains were more homogeneous in 8-ECAPed samples than in 2-ECAPed samples. A rapid grain growth occurred when 2-ECAPed samples were annealed at high temperature（≥300°C）. The magnetic field enhanced the mobility of dislocations and grain boundaries. A more homogeneous grain size was observed in samples prepared under an applied magnetic field.
关键词：
