采用拉伸试验、X射线衍射分析(XRD)、电子背散射衍射分析(EBSD)、晶间腐蚀试验和剥落腐蚀试验等方法,研究了压缩大变形(20％压缩、45％压缩)对7085铝合金固溶-时效组织性能的影响.结果表明:压缩大变形能提高合金的拉伸强度(从440.9 MPa分别提升到481.2 MPa和514.5 MPa),显著细化晶粒尺寸(平均晶粒尺寸从31.580 μm分别降低到7.414 μm和6.469 μm),压缩大变形还能提高合金的抗晶间腐蚀性能和抗剥落腐蚀性能,定量分析显示,压缩大变形处理显著提高了位错强化和小角度强化的总强化.
参考文献
| [1] | Tolga Dursun;Costas Soutis.Recent developments in advanced aircraft aluminium alloys[J].Materials & design,2014Apr.(Apr.):862-871. |
| [2] | T. Warner.Recently-Developed Aluminum Solutions for Aerospace Applications[J].Materials Science Forum,2006Pt.2(Pt.2):1271-1278. |
| [3] | 杜明义.用铝合金材料实现汽车轻量化[J].轻合金加工技术,2007(02):11-11,51. |
| [4] | P. Luo;D.T. McDonald;W. Xu.A modified Hall-Petch relationship in ultrafine-grained titanium recycled from chips by equal channel angular pressing[J].Scripta materialia,201210(10):785-788. |
| [5] | Cabibbo, M..Microstructure strengthening mechanisms in different equal channel angular pressed aluminum alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2013:413-432. |
| [6] | 徐红星 .等通道转角大应变技术制备块体纳米结构铝材的研究[D].江苏大学,2010. |
| [7] | K.M. Youssef;R.O. Scattergood;K.L. Murty.Nanocrystalline Al-Mg Alloy with Ultrahigh Strength and Good Ductility[J].Scripta materialia,20062(2):251-256. |
| [8] | Y.H. Zhao;X.Z. Liao;Z. Jin.Micro structures and mechanical properties of ultrafine grained 7075 Al alloy processed by ECAP and their evolutions during annealing[J].Acta materialia,200415(15):4589-4599. |
| [9] | 程晓农;宋刚;莫纪平;徐红星;许晓静.强化固溶态2024铝合金ECAP加工后的拉伸性能[J].江苏大学学报（自然科学版）,2007(1):33-36. |
| [10] | 宋涛;许晓静;范真;张振强;王彬;罗勇.含锶钪2099型铝锂合金的晶间腐蚀和剥落腐蚀性能[J].稀有金属,2012(2):196-200. |
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