Small Angle X-Ray Scattering Study in Equal-Channel Angular Pressed 7055 Al Alloys

Abstract:

Article Preview

A study was conducted on 7055 Al alloys processed by Equal-channel Angular Pressing (ECAP). The quantitative information about precipitate size, distribution and volume fraction in ECAPed samples was investigated by small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). It is found that with the number of ECAP increasing, the quantitative information about volume fraction (fv), precipitate size (R), specific inner surface of particle-matrix (Sp), and integrated intensity (Q0) all increased, indicating that ECAP enhanced the nucleation and growth of precipitates. The microhardness of samples after two passes of ECAP is higher than that of T6 treated samples even after 96 h at 120°C. The formation of fine grains, higher volume fraction of precipitates, together with strain hardening induced by severe deformation are the main factors leading to a high microhardness in ECAPed samples.

Info:

Periodical:

Materials Science Forum (Volumes 546-549)

Edited by:

Yafang Han et al.

Pages:

839-844

Citation:

L. J. Zheng et al., "Small Angle X-Ray Scattering Study in Equal-Channel Angular Pressed 7055 Al Alloys", Materials Science Forum, Vols. 546-549, pp. 839-844, 2007

Online since:

May 2007

Export:

Price:

$38.00

[1] V. M. Segal: Materials Science and Engineering Vol. A197 (1995), p.157.

[2] Y.T. Zhu, T.C. Lowe: Materials Science and Engineering Vol. A291 (2000), p.46.

[3] Y. Iwahashi, Z. Horita: Acta mater Vol. 46(9) (1998), p.3317.

[4] V.Y. Gertsman, R. Virringer, R.Z. Valiev, H. Gleiter, Scripta Metall: Vol. 30 (1994), p.229.

[5] Saunders, J. Nutting: J. Met. Sci Vol. 18 (1984), p.571.

[6] S.Y. Yuan, J.W. Yeh, C.H. Tsau: Materials Transactions. JIM Vol. 40(3) (1999), p.233.

[7] S. Ferrasse, V.M. SEGAL: Metallurgical and Materials Transactions A Vol. 28A (1997), p.1047.

[8] .O.V. Mishin, V.Y. Gertsman, R.Z. Valiev: Mater. Sci. Forum Vol. 235-238 (1997), p.887.

[9] Z. Horita, T. Fujinami, M. Nemoto, T.G. Langdon: The Japan Institute of Light Metals Vol. 1 (1998), p.449.

[10] V.V. Stolyarov, Y.T. Zhu, T.C. Lowe, R.Z. Valiev: Materials Science & Engineering Vol. A303 (2001), p.82.

[11] M. Murayama, K. Hono, Z. Horita: Materials Transactions. JIM Vol. 40(9) (1999), p.938.

[12] S.L. Semiatin, P.B. Berbon, T.G. Langdon: Scr Mater Vol. 44 (2001), p.135.

[13] Li Jin, Dongliang Lin, Dali Mao et al: Materials Science Forum Vol. 488-489 (2005), p.601.

[14] T.G. Langdon, M. Furukawa, M. Nemoto, Z. Horita: JOM Vol. 52(4) (2000), p.30.

[15] J.C. Werenskiold, A. Deschamps, Y. Bréchet: Materials Science and Engineering Vol. A293 (2000), p.267.

Fetching data from Crossref.
This may take some time to load.