多向锻造与时效处理对7075铝合金强塑性的影响
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摘要
对7075铝合金进行了多向锻造及时效处理。进行了试样硬度测试、室温拉伸测试、金相显微镜和透射电子显微镜(TEM)观察。结果表明,合金经多向锻造及时效后,组织显著细化,强度提高且塑性良好,抗拉强度为604.9 MPa,较原材料T6态提高了11.5%;伸长率与T6态相当,约9.4%。
Multi-direction forging and aging treatment of 7075 aluminum alloy were carried out. Hardness test, tensile test at room temperature, metallographic microscope and transmission electron microscope(TEM) were carried out. The results show that after multi-directional forging and aging, the microstructure of the alloy is remarkably refined, the strength is improved and the plasticity is good. The tensile strength of the alloy is 604.9 MPa, which is increased by 11.5% compared to that of the raw material in T6 state, and the elongation of the alloy is equivalent to that of the raw material in T6 state, about 9.4%.
Multi-direction forging and aging treatment of 7075 aluminum alloy were carried out. Hardness test, tensile test at room temperature, metallographic microscope and transmission electron microscope(TEM) were carried out. The results show that after multi-directional forging and aging, the microstructure of the alloy is remarkably refined, the strength is improved and the plasticity is good. The tensile strength of the alloy is 604.9 MPa, which is increased by 11.5% compared to that of the raw material in T6 state, and the elongation of the alloy is equivalent to that of the raw material in T6 state, about 9.4%.
引文
[1]Valiev R Z,Islamgaliev R K,Alexandrov I V.Bulk nanostructured materials from severe plastic deformation[J].Progress in Materials Science,2000,45(2):103-189.
[2]郭强,严红革,陈振华,等.多向锻造技术研究进展[J].材料导报,2007,21(2):106-108.
[3]张小明,张廷杰,田锋,等.多向锻造对改善7075铝合金性能的作用[J].稀有金属材料与工程,2003,32(5):372-374.
[4]张廷杰,张小明,田锋,等.多向锻造7075铝合金的结构和性能[J].稀有金属材料与工程,2002,31(4):257-260.
[5]Cai C,Song Linghui,Du Xinghao,et al.Enhanced mechanical property of AZ31B magnesium alloy processed by multi-directional forging method[J].Materials Characterization,2017,131:72-77.
[6]Azushima A,Aoki K.Properties of ultrafine-grained steel by repeated shear deformation of side extrusion process[J].Materials Science and Engineering A,2002,337(1/2):45-49.
[7]Eizadjou M,Manesh H D,Janghorban K.Microstructure and mechanical properties of ultra-fine grains(UFGs)aluminum strips produced by ARB process[J].Journal of Alloys and Compounds,2009,474(1/2):406-415.
[8]Aoba T,Kobayashi M,Miura H.Effects of aging on mechanical properties and microstructure of multi-directionally forged 7075 aluminum alloy[J].Materials Science and Engineering A,2017,700:220-225.
[9]Ludtka G M,Laughlin D E.The influence of microstructure and strength on the fracture mode and toughness of 7xxx series aluminum alloys[J].Metallurgical Transactions A,1982,13(3):411-425.
[10]Zhao Y H,Liao X Z,Cheng S,et al.Simultaneously increasing the ductility and strength of nanostructured alloys[J].Advanced Materials,2010,18(17):2280-2283.
[2]郭强,严红革,陈振华,等.多向锻造技术研究进展[J].材料导报,2007,21(2):106-108.
[3]张小明,张廷杰,田锋,等.多向锻造对改善7075铝合金性能的作用[J].稀有金属材料与工程,2003,32(5):372-374.
[4]张廷杰,张小明,田锋,等.多向锻造7075铝合金的结构和性能[J].稀有金属材料与工程,2002,31(4):257-260.
[5]Cai C,Song Linghui,Du Xinghao,et al.Enhanced mechanical property of AZ31B magnesium alloy processed by multi-directional forging method[J].Materials Characterization,2017,131:72-77.
[6]Azushima A,Aoki K.Properties of ultrafine-grained steel by repeated shear deformation of side extrusion process[J].Materials Science and Engineering A,2002,337(1/2):45-49.
[7]Eizadjou M,Manesh H D,Janghorban K.Microstructure and mechanical properties of ultra-fine grains(UFGs)aluminum strips produced by ARB process[J].Journal of Alloys and Compounds,2009,474(1/2):406-415.
[8]Aoba T,Kobayashi M,Miura H.Effects of aging on mechanical properties and microstructure of multi-directionally forged 7075 aluminum alloy[J].Materials Science and Engineering A,2017,700:220-225.
[9]Ludtka G M,Laughlin D E.The influence of microstructure and strength on the fracture mode and toughness of 7xxx series aluminum alloys[J].Metallurgical Transactions A,1982,13(3):411-425.
[10]Zhao Y H,Liao X Z,Cheng S,et al.Simultaneously increasing the ductility and strength of nanostructured alloys[J].Advanced Materials,2010,18(17):2280-2283.