采用连续铸造和等径角挤压变形(ECAP)加工集成技术制备Cu-Ag合金,研究其力学性能和相应的拉伸断口形态.研究发现,Cu-Ag合金的强度随着ECAP加工道次和Ag含量的增加而增加,而延伸率却下降.连续铸造和ECAP加工的合金与传统浇铸和ECAP加工的合金相比,缩颈前静态韧性有所提高.同时发现,只有连铸的Cu-Ag合金在断裂前表现出缩颈现象,而经ECAP挤压后试样的断裂变为剪切模式,随着ECAP道次的增加出现不同的剪切断裂角.基于实验结果,讨论了经ECAP挤压后连铸Cu-Ag合金的拉伸断裂机制.
参考文献
| [1] | Segal VM .Equal channel angular extrusion of flat products[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2008(1/2):178-185. |
| [2] | Popov, V.V.;Popova, E.N.;Stolbovskiy, A.V..Nanostructuring Nb by various techniques of severe plastic deformation[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2012:22-29. |
| [3] | Tian, Y.Z.;Wu, S.D.;Zhang, Z.F.;Figueiredo, R.B.;Gao, N.;Langdon, T.G. .Comparison of microstructures and mechanical properties of a Cu-Ag alloy processed using different severe plastic deformation modes[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2011(13/14):4331-4336. |
| [4] | Stolyarov VV.;Zhu YT.;Alexandrov IV.;Lowe TC.;Valiev RZ. .Grain refinement and properties of pure Ti processed by warm ECAP and cold rolling[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):43-50. |
| [5] | Hohenwarter, A.;Pippan, R..A comprehensive study on the damage tolerance of ultrafine-grained copper[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2012:89-96. |
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