|
|
|
| Microstructure and properties evolution and mechanism analysis of sintered aluminum powder during equal channel angular expression |
| LI Ping; XUE Kemin; ZHOU Mingzhi |
| School of Materials Science and Engineering; Hefei University of Technology; Hefei 230009 |
|
Cite this article:
LI Ping XUE Kemin ZHOU Mingzhi. Microstructure and properties evolution and mechanism analysis of sintered aluminum powder during equal channel angular expression. Chin J Mater Res, 2009, 23(6): 577-581.
|
|
|
Abstract Experiments of ECAE were conducted for pure aluminum powder sintered material under different routes and passes. The grain refinement regulation and densification behavior of powder material during ECAE were deeply investigated under different conditions with optical telescope, scan electronic telescope and transmission electronic telescope. The density and hardness of the extruded samples were measured. The experiment results show that ECAE has powerful densification and refinement effects and the mechanical properties of powder materials are improved In single ECAE, large shear plastic deformation and high hydrostatic stress state are the key factors to obtain high density material In multiple passes ECAE, the inner pore shape is changed and the powder material is compacted further by the accumulated deformation and different shear deformation characters. The grain refinement effect depends on some key factors such as hydrostatic stress, strain and shear deformation character etc.
|
|
Received: 19 January 2009
|
|
|
| Fund: Supported by National Nature Science Foundation of China No.50875072. |
| 1 R.Z.Valiev, R.K.Islamgaliev, I.V.Alexandrov, Bulk nanostructured materials from severe plastic deformation, Progress in Materials Science, 45(2), 103(2000)
2 R.Z.Valiev, T.G.Langdon, Principles of equal-channel angular pressing as a processing tool for grain refinement, Progress in Materials Science, 51(7), 881(2006)
3 R.Z.Valiev, N.A.Krasilnikov, N.K.Tsenev, Plastic deformation of alloys with submicron grained structure, Materials Science and Engineering A, 137(15), 35(1991)
4 O.N.Senkov, S.V.Senkov, J.M.Scott, D.B.Miracle, Compaction of amorphous aluminum alloy powder by direct extrusion and equal channel angular extrusion, Materials Science and Engineering A, 393(1-2), 12(2005)
5 K.Matsuki, T.Aida, T.Takeucki, J.Kusui, K.Yokoe, Microstructural characteristics and superplastic-like behavior in aluminum powder alloy consolidated by equalchannel angular pressing, Acta Materialia, 48(10), 2625(2000)
6 S.Y.Chang, K.S.Lee, S.H.Choi, D.H.Shin, Effect of ECAP on microstructure and mechanical properties of a commercial 6061Al alloy produced by powder metallurgy, Journal of Alloys and Compounds, 354(1-2), 216(2003)
7 K.Xia, X.Wu, Back pressure equal channel angular consolidation of pure Al particles, Scripta Materialia, 53(11), 1225(2005)
8 M.Haouaoui, I.Karaman, H.J.Maier, K.T.Hartwiq, Microstructure evolution and mechanical behavior of bulk copper obtained by consolidation of micro-and nanopowders using equal-channel angular extrusion, Metallurgical and materials transactions A, 35(9), 2936(2004)
9 J.P.Mathieu, S.Suwas, A.Eberhardt, L.S.T´oth, P.Moll, A new design for equal channel angular extrusion, Journal of Materials Processing Technology, 173(1), 29(2006)
10 M.Furukawa, Z.Horita, M.Nemoto, T.G.Longdon, Processing of metals by equal channel angular pressing, Journal of Materials Science, 36(12), 2835(2001)
11 T.G.Langdon, M.Furukawa, M.Nemoto, Z.Horita, Ultrafinegrained microstructure evolving during severe plastic deformation, JOM, 52(4), 30(2000)
12 Y.T.Zhu, T.C.Lowe, Observations and issues on mechanisms of grain refinement during ECAP process, Materials Science and Engineering A, 291(1-2), 46(2000) |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
