Improving the comprehensive mechanical property of the rheo-extruded Al-Fe alloy by severe rolling deformation
Improving the comprehensive mechanical property of the rheo-extruded Al-Fe alloy by severe rolling deformation
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剧烈轧制变形提高流变挤压Al-Fe合金的综合力学性能
DOI：
10.1016/j.jmrt.2019.12.008
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发表时间：
2020-03-01
影响因子：
6.4
通讯作者：
Zhao, Hongjin
中科院分区：
文献类型：
--
作者：
Chen, Jiqiang;Liu, Chao;Zhao, Hongjin
采用连续流变挤压法制备Al-3Fe合金，利用扫描电镜（SEM）、透射电镜（TEM）和拉伸试验研究了轧制变形对流变挤压Al-3Fe合金组织和性能的影响。还制备了流变挤压纯Al用于比较。结果表明，轧制变形可以进一步细化流变挤压铝铁合金的晶粒，减小铝铁相的尺寸。由于纳米级和亚微米级Al 3Fe相的存在，流变挤压Al-Fe合金的强度明显高于流变挤压纯铝，且这一优势在随后的轧制变形中得以保持。当压下量超过60%时，Al-Fe合金和纯铝的强度和延伸率同时提高，当压下量达到90%时，Al-Fe合金和纯铝的综合力学性能最佳。其主要贡献是由于晶粒细化和高分数亚结构的形成。(C)2019由Elsevier B. V.出版
Al-3Fe alloy was prepared by the method of continuous rheo-extrusion, and the effect of rolling deformation on the microstructure and the property of the rheo-extruded Al-3Fe alloy was studied by means of scanning electron microscope (SEM), transmission electron microscopy (TEM) and tensile test. The rheo-extruded pure Al was also prepared for comparison. The results showed that the rolling deformation could further refine the grain size of the rheo-extruded Al-Fe alloy, and reduce the size of the Al-Fe phase. Due to the present of nanosized and sub-micron sized Al3Fe phase, the strength of rheo-extruded Al-Fe alloy is significantly higher than that of rheo-extruded pure Al, and this advantage has been maintained during subsequently rolling deformation. Moreover, the strength and the elongation are simultaneously increased when the rolling reduction exceeds 60% for Al-Fe alloy and pure Al. Both of Al-Fe alloy and pure Al have the best comprehensive mechanical property when the rolling reduction reaches 90%. The main contribution is attributed to the grain refinement and the formation of high fraction substructure. (C) 2019 Published by Elsevier B.V.