Wenlin Wu, Yanli Song, Pu Zhou, Jue Lu, Yongqing Yu, Lin Hua
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引用次数: 0
摘要
电击处理（EST）在金属中引起的快速相变现象已被广泛观察到，但很少对其动力学过程进行定量分析。本研究利用扫描电子显微镜和透射电子显微镜研究了 EST 引起的铝锌镁铜合金中第二相的溶解。研究发现，EST 能充分溶解合金中的纳米级沉淀、Al2CuMg 相和短棒形分散相。此外，还提出了一个非等温溶解动力学模型来描述EST过程中铝-锌-镁-铜合金中第二相的溶解过程。通过对这些模型进行数值求解，得到了EST 过程中第二相溶解的演变规律和关键因素。求解结果与实验监测到的现象基本一致。这些模型可用于说明EST在其他金属材料中引起的相变。
Rapid dissolution kinetic of the second phases in high-strength aluminum alloy by electroshock treatment
The phenomenon of rapid phase transition induced by electroshock treatment (EST) in metals has been widely observed, but its kinetic process is rarely quantitatively analyzed. In this work, the dissolution of the second phases in the Al–Zn–Mg–Cu alloys caused by EST was investigated using scanning electron microscopy and transmission electron microscopy. It was found that EST can sufficiently dissolve nanoscale precipitates, Al2CuMg phases and the short rod-shaped dispersed phases in the alloys. Additionally, a non-isothermal dissolution kinetics model has been proposed to depict the dissolution process of the second phase in the Al–Zn–Mg–Cu alloys during EST. The evolution laws and key factors of the second phase dissolution during EST were obtained by numerically solving these models. The solving results are basically consistent with the phenomena monitored in the experiment. These models are expected to be adopted to illustrate the phase transition induced by EST in other metal materials.
期刊介绍：
The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.
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