Microstructure and mechanical properties of an extruded Mg-2Dy-0.5Zn (at.%) alloy during isothermal ageing at 180 °C were investigated. Microstructure of the as-extruded alloy is mainly composed of α-Mg phase, 14H long period stacking order (LPSO) phase and small amounts of (Mg, Zn)xDy particle phases. During ageing, the 14H LPSO phase forms and develops and its volume fraction increases with increasing ageing time. Tensile test showed that the peak-aged alloy exhibits similar yield and ultimate tensile strengths and elongation to failure at room temperature, 100 °C and 200 °C, but excellent elevated temperature strengths at 300 °C as compared to the as-extruded and over-aged alloys. The analysis showed that the excellent elevated temperature strengths of the peak-aged alloy are attributed to the LPSO phase strengthening and the grain refinement strengthening, and the role of the LPSO strengthening is related to not only its amount, but also its morphology.
参考文献
| [1] | Y. Kawamura, K. Hayashi, A. Inoue and T. Masumoto: Mater. Trans., 2001, 42, 1172.[2 ] E. Abe, Y. Kawamura, K. Hayashi and A. Inoue: Acta Mater., 2002, 50, 3845.[3 ] D.H. Ping, K. Hono, Y. Kawamura and A. Inoue: Philos. Mag. Lett., 2002, 82, 543.[4 ] M. Matsuda, S. Ii, Y. Kawamura, Y. Ikuhara and M. Nishida: Mater. Sci. Eng. A, 2005, 393, 269.[5 ] Y. Kawamura and M. Yamasaki: Mater. Trans., 2007, 48, 2986.[6 ] T. Itoi, T. Seimiya, Y. Kawamura and M. Hirohashi: Scripta Mater., 2004, 51, 107.[7 ] Y. Chino, M. Mabuchi, S. Hagiwara, H. Iwasaki, A. Yamamoto and H. Tsubakino: Scripta Mater., 2004, 51, 711.[8 ] Y.M. Zhu, M. Weyland, A.J. Morton, K. Oh-ishi, K. Hono and J.F. Ni: Scripta Mater., 2009, 60, 980.[9 ] Y.M. Zhu, A.J. Morton and J.F. Nie: Acta Mater., 2010, 58, 2936.[10] T. Honma, T. Ohkubo, S. Kamado and K. Hono: Acta Mater., 2007, 55, 4137.[11] M. Yamasaki, M. Sasaki, M. Nishijima, K. Hiraga and Y. Kawamura: Acta Mater., 2007, 55, 6798.[12] K. Liu, J.H. Zhang, D.X. Tang, L.L. Rokhlin, F.M. Elkin and J. Meng: Mater. Chem. Phys., 2009, 117, 107.[13] T. Homma, N. Kunito and S. Kamado: Scripta Mater., 2009, 61, 644.[14] S. Yoshimoto, M. Yamasaki and Y. Kawamura: Mater. Trans., 2006, 47, 959.[15] K. Liu, J.H. Zhang, W. Sun, X. Qiu, H.Y. Lu, D.X. Tang, L.L. Rokhlin, F.M. Elkin and J. Meng: J. Mater. Sci., 2009, 44, 74.[16] K. Liu, J.H. Zhang, G.H. Su, D.X. Tang, L.L. Rokhlind, F.M. Elkind and J. Meng: J. Alloy. Compd., 2009, 481, 811.[17] M. Yamasaki, T. Anan, S. Yoshimoto and Y. Kawamura: Scripta Mater., 2005, 53, 799.[18] G.L. Bi, D.Q. Fang, L. Zhao, J.S. Lian, Q. Jiang and Z.H. Jiang: Mater. Sci. Eng. A, 2011, 528, 3609.[19] Y. Zhang, X.Q. Zeng, L.F. Liu, C. Lu, H.T. Zhou, Q. Li and Y.P. Zhu: Mater. Sci. Eng. A, 2004, 373, 320.[20] Z. Yang, Y.C. Guo, J.P. Li, F. He, F. Xia and M.X. Liang: Mater. Sci. Eng. A, 2008, 485, 487.[21] D.J. Li, X.Q. Zeng, J. Dong, C.Q. Zhai and W.J. Ding: J. Alloy. Compd., 2009, 468, 164.[22] W.J. Ding, Y.J. Wu, L.M. Peng, X.Q. Zeng and G.Y. Yuan: J. Mater. Res., 2009, 24, 1842.[23] Y.J. Wu, D.L. Lin, X.Q. Zeng, L.M. Peng and W.J. Ding: J. Mater. Sci., 2009, 44, 1607.[24] M. Suzuki, T. Kimura, J. Koike and K. Maruyama: Mater. Sci. Eng. A, 2004, 387{389, 706.[25] A. Ono, E. Abe, T. Itoi, M. Hirohashi, M. Yamasaki and Y. Kawamura: Mater. Trans., 2008, 49, 990.[26] J. Lee, K. Sato, T.J. Konno and K. Hiraga: Mater. Trans., 2009, 50, 222.[27] Q.M. Peng, H.W. Dong, L.D. Wang, Y.M. Wu and L.M. Wang: Mater. Sci. Eng. A, 2008, 477, 193.[28] X.L. Hou, Q.M. Peng, Z.Y. Cao, S.W. Xu, S. Kamado and L.D. Wang: Mater. Sci. Eng. A, 2009, 520, 162.[29] D.Q. Fang, G.L. Bi, L.M. Wang, G.Y. Li and Z.H. Jiang: Mater. Sci. Eng. A, 2010, 527, 4383.[30] T. Itoi, K. Takahashi, H. Moriyama and M. Hirohashi: Scripta Mater., 2008, 59, 1155.[31] Y. Kawamura, T. Kasahara, S. Izumi and M. Yamasaki: Scripta Mater., 2006, 55, 453.[32] M. Matsuda, S. Ando and M. Nishida: Mater. Trans., 2005, 46, 361.[33] X.H. Shao, Z.Q. Yang and X.L. Ma: Acta Mater., 2010, 58, 4760.[34] K. Hagihara, A. Kinoshita, Y. Sugino, M. Yamasaki, Y. Kawamura, H.Y. Yasuda and Y. Umakoshi: Acta Mater., 2010, 58, 6282. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%