Elasticity, Anelasticity and Yield Strength of Al-Si Alloys Obtained by Directional Crystallization

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Acoustic measurements of Young’s modulus and internal friction at frequencies of longitudinal vibrations of about 100 kHz were made in the (5×10-7 to 2×10-4) vibration strain amplitude range for Al-Si alloys. Quasi-static bending stress-strain diagrams were studied as well. The samples of the alloy were prepared using a directional crystallization by Stepanov’s method. The compositions varied from 8 to 25 wt.%Si. The micro-plastic deformation of the materials (acoustic experiments) is explained by dislocation motion in grains of α solid solution. The micro-plastic yield stress has a minimum near the eutectic composition; the flow stress of plastic bending increases smoothly when the Si content increases.

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Periodical:

Solid State Phenomena (Volume 184)

Edited by:

Robert Schaller and D. Mari

Pages:

161-166

DOI:

10.4028/www.scientific.net/SSP.184.161

Citation:

S.P. Nikanorov et al., "Elasticity, Anelasticity and Yield Strength of Al-Si Alloys Obtained by Directional Crystallization", Solid State Phenomena, Vol. 184, pp. 161-166, 2012

Online since:

January 2012

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$35.00

[1] G.B. Stroganov, V.A. Rotenberg, G.B. Gershman, Aluminum-Silicon Alloy. Metallurgy, Moscow, 1977 (in Russian).

[2] L.F. Mondolfo, Aluminum Alloys: Structure and Properties, Butterworths, London-Boston. (1976).

[3] M. Gupta, S. Ling, J. Alloys Comp. 287 (1999) 284-294.

[4] S.P. Nikanorov, M.P. Volkov, V.N. Gurin, Yu.A. Burenkov, L.I. Derkachenko, B.K. Kardashev, L.L. Regel and W.P. Wilcox, Structural and mechanical properties of Al-Si alloys obtained by fast cooling of a levitated melt, Mater. Sci. Eng. A390 (2005).

DOI: 10.1016/j.msea.2004.07.037

[5] S.P. Nikanorov, V.V. Peller. Shaping by pulling from the melt, in: G.E. Totten, D.S. MacKenzie (Eds. ), Handbook of Aluminum, V. 1, Marcel Dekker Inc., New York-Basel, 2003, pp.695-737.

[6] G. Simmons, H. Wang. Single Crystal Elastic Constants and Calculated Aggregate Properties: A Handbook. M.I.T. Press, Cambridge, Massachusetts, and London, England. (1971).

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