以1420铝锂合金为研究对象, 通过拉伸力学性能测试和拉伸断口形貌观察比较全面地研究了板材力学性能的各向异性水平及其表现规律, 并探讨了各向异性在时效过程中的演化及产生各向异性的主要因素. 研究结果表明: 该1420铝锂合金的力学性能具有明显的各向异性; 屈服强度与抗拉强度各向异性的表现规律有所不同; 在达到峰时效之前, 随着时效时间的延长, 合金力学性能的各向异性在增加, 而增幅在减小. 合金力学性能的平面各向异性主要源于其晶体学织构、晶粒形貌和时效析出相等的交互作用.
参考文献
[1] | Jata K V;Hopkins A K;Rioja R J .The anisotropy andTexture of Al-Li alloys[J].Materials Science Forum,1996,217-222:647. |
[2] | 杨守杰,戴圣龙,陆政,苏彬,颜鸣皋.Zr对Al-Li合金热轧板材的再结晶温度、各向异性和织构的影响[J].航空材料学报,2001(02):6-9. |
[3] | Birt M J;Hafley R A;Wagner J A et al.The fracture resistance of 1420 and 1421 Al-Mg-Li alloys[J].Scripta Metallurgica et Materialia,1993,28:919. |
[4] | Rioja R J .Fabrication methods to manufacture isotropic Al-Li alloys and products for space and aerospace applications[J].Materials Science and Engineering A,1998,257:100. |
[5] | Cho KK;Lee CW;Kwun SI;Shin MC;Chung YH .Effects of grain shape and texture on the yield strength anisotropy of Al-Li alloy sheet[J].Scripta materialia,1999(6):651-657. |
[6] | Kim N J;Lee E W .Effect of T1precipitate on the anisotropy of Al-Li alloy 2090[J].冶金材料学报,1993,41(03):941. |
[7] | Gayle F W;Tack W T;Swanson G et al.Composition and anisotropy in Al-Cu-Li-Ag-Mg-Zr alloys[J].Scripta Metallurgica et Materialia,1994,30(06):761. |
[8] | Vasudevan A K;Prozystupa M A;Fricke W G .Texture-microstructure effects in yield strength anisotropy of 2090 sheet alloy[J].Scripta Metallurgica et Materialia,1990,24(08):1429. |
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