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Elastic and microplastic properties of Al–Si/Ge alloys obtained from levitated melts

✍ Scribed by S.P. Nikanorov; Yu. A. Burenkov; M.P. Volkov; V.N. Gurin; L.I. Derkachenko; B.K. Kardashev; L.L. Regel; W.R. Wilcox

Publisher: Elsevier Science
Year: 2006
Tongue: English
Weight: 814 KB
Volume: 442
Category: Article
ISSN: 0921-5093
DOI: 10.1016/j.msea.2006.04.141

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✦ Synopsis

Structure, density, Young's modulus temperature dependencies as well as Young's modulus and ultrasound damping as a function of vibration strain were studied for Al-Si and Al-Ge hypo-and hyper-alloys. Samples were obtained by fast cooling of a levitated melt. Aging of Al-Si alloy and recovery of Al-Ge properties were observed. These phenomena were explained by a transformation of bond type during formation of Si-or dissolving Ge-rich zones. Stress-strain curves of micro-deformation determined from acoustical tests and of macro-deformation by quasi-static bending tests were studied. Their concentration dependencies were explained by an effect of grain sizes of eutectic matrix and an effect of primary crystals.

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