Elastic and microplastic properties of Al–Si/Ge alloys obtained from levitated melts
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- 作者：S.P. Nikanorov ; Yu. A. Burenkov ; M.P. Volkov ; V.N. Gurin ; L.I. Derkachenko ; B.K. Kardashev ; L.L. Regel ; W.R. Wilcox
- 关键词：Aluminum ; Alloys ; Microstructure ; Elasticity ; Mechanical damping ; Plasticity
- 刊名：Materials Science and Engineering: A
- 出版年：2006
- 出版时间：20 December 2006
- 年：2006
- 卷：442
- 期：1-2
- 页码：449-453
- 全文大小：813 K
文摘
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.