Compressive Deformation Behavior of the SiCw/AZ91 Composite at Elevated Temperatures

Abstract:

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Compressive behaviors of SiCw/AZ91composite and AZ91 alloy were investigated at temperatures from 423 K to 723 K and strain rates from 0.002 s-1 to 0.25 s-1. Microstructure evolutions after compressed at 623 K and 0.01 s-1 were observed by SEM and TEM. Results showed that compressive flow stress decreased with the increase of temperature; whiskers were broken and redistributed to the direction normal to the compression direction. At the initial stage of compression, dislocation sliding is the mainly deformation mode for the composite, while for AZ91 alloy, twining was the dominant mechanism.

Info:

Periodical:

Materials Science Forum (Volumes 488-489)

Edited by:

W.Ke, E.H.Han, Y.F.Han, K.Kainer and A.A.Luo

Pages:

783-786

DOI:

10.4028/www.scientific.net/MSF.488-489.783

Citation:

S.B. Li et al., "Compressive Deformation Behavior of the SiCw/AZ91 Composite at Elevated Temperatures", Materials Science Forum, Vols. 488-489, pp. 783-786, 2005

Online since:

July 2005

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$35.00

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