挤压温度对AA7003铝合金组织性能的影响
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摘要
采用力学拉伸、扫描电镜、电子背散射衍射和电化学腐蚀等测试分析方法,研究了不同挤压参数下7003铝合金的再结晶程度、织构和力学性能之间的关系。结果表明,挤压温度为450℃,挤压速度为1 mm/s时,合金的再结晶程度最大,而且再结晶程度升高使合金的力学性能下降。当挤压温度为470℃时,出现较强的再结晶立方织构{001}<100>,合金的抗拉强度和伸长率升高。因此可以得出结论,立方织构可以提高挤压态7003铝合金的抗拉强度和伸长率。
The relations among recrystallization, texture and mechanical properties of AA7003 alloy under different extrusion processes were investigated by means of mechanical tensile, SEM, EBSD and electrochemical corrosion test. The results showed that the recrystallization extent reached maximum under the extrusion process conditions of T=450 °C and v=1 mm/s, and the increase of recrystallization extent had a negative effect on the mechanical properties. Moreover, a relatively strong recrystallization cube orientation {001}<100>appeared when the extrusion temperature was 470 °C, which leads to a high tensile strength and elongation. Thus, it can be concluded that the cube texture is beneficial to the increase of tensile strength and elongation of extruded AA7003 alloy.
The relations among recrystallization, texture and mechanical properties of AA7003 alloy under different extrusion processes were investigated by means of mechanical tensile, SEM, EBSD and electrochemical corrosion test. The results showed that the recrystallization extent reached maximum under the extrusion process conditions of T=450 °C and v=1 mm/s, and the increase of recrystallization extent had a negative effect on the mechanical properties. Moreover, a relatively strong recrystallization cube orientation {001}<100>appeared when the extrusion temperature was 470 °C, which leads to a high tensile strength and elongation. Thus, it can be concluded that the cube texture is beneficial to the increase of tensile strength and elongation of extruded AA7003 alloy.
引文
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[2]谢建新,刘静安.金属挤压理论与技术[M].第2版.北京:冶金工业出版社,2012.
[3]肖亚庆.铝加工技术实用手册[M].北京:冶金工业出版社,2004.
[4]CHEN Q,XIA X,YUAN B,et al.Microstructure evolution and mechanical properties of 7A09 high strength aluminium alloy processed by backward extrusion at room temperature[J].Materials Science&Engineering A,2013,588(24):395-402.
[5]CHEN G,CHEN L,ZHAO G,et al.Microstructure analysis of an Al-Zn-Mg alloy during porthole die extrusion based on modeling of constitutive equation and dynamic recrystallization[J].Journal of Alloys&Compounds,2017,710.
[6]EIVANI A R,ZHOU J.Application of physical and numerical simulations for interpretation of peripheral coarse grain structure during hot extrusion of AA7020 aluminum alloy[J].Journal of Alloys&Compounds,2017,725.
[7]寇琳媛,金能萍,张辉,等.7150铝合金高温热压缩变形流变应力行为[J].中国有色金属学报,2010,20(1):43-48.
[8]ZHANG J X,MA M,LIU W C.Effect of initial grain size on the recrystallization and recrystallization texture of cold-rolled AA 5182aluminum alloy[J].Materials Science&Engineering A,2017,690:233-243.
[9]CHEN Y C,HUANG Y Y,CHANG C P,et al.The effect of extrusion temperature on the development of deformation microstructures in5052 aluminum alloy processed by equal channel angular extrusion[J].Acta Material,2003,51(7):2005-2015.
[10]薛杰,王有为,张志豪,等.挤压温度对Al-Zn-Mg-Cu合金动态再结晶、时效组织和力学性能的影响[J].中国有色金属学报,2017(11):003.
[11]LIU W C,ZHAI T,MAN C S,et al.Effect of initial texture on texture evolution in cold-rolled AA 5182 aluminum alloy[J].Philosophical Magazine,2004,84(31):3305-3321.
[12]LIU W C,YUAN H,HUANG M J.Effect of rolling reduction on the P{011}<455>recrystallization texture in a supersaturated Al-Mn-Mg alloy[J].Metallurgical&Materials Transactions A,2009,40(12):2794-2797.
[13]POORGANJI B,SEPEHRBAND P,JIN H,et al.Effect of cold work and non-isothermal annealing on the recrystallization behavior and texture evolution of a precipitation-hardenable aluminum alloy[J].ScriptaMaterialia,2010,63(12):1157-1160.
[14]LIAO L H,JIN H,GALLERNEAULT M,et al.Recrystallization behavior of a co-cast AA3xxx-AA6xxx aluminum alloy laminate-Effect of annealing conditions and cold reduction levels[J].Materials Characterization,2014,94(8):215-226.
[15]DOHERTY R D,HUGHES D A,HUMPHREYS F J,et al.Current issues in recrystallization:a review[J].Materials Science&Engineering A,1997,238(2):219-274.
[16]邓运来,王亚风,林化强,等.挤压温度对Al-Zn-Mg合金力学性能的影响[J].材料研究学报,2016(2):87-94.
[17]张新明.中间退火对高纯铝箔立方织构的影响[J].材料工程,2001,32(2):85-88.
[18]曹零勇,郭明星,崔华,等.汽车用6111铝合金板材力学性能和织构研究[J].材料热处理学报,2013(7):118-123.
[19]王运雷.退火过程中高纯铝箔微观组织演变及其再结晶行为的研究[D].重庆:重庆大学,2016.