Crystal system of rod-shaped precipitates in an Al-1.0mass%Mg{sub 2}Si-0.4mass%Si alloy
- Toyama Univ. (Japan)
- Tokyo Inst. of Tech. (Japan)
The crystal system of a rod-shaped precipitate (metastable phase) in an Al-Mg{sub 2}Si pseudo-binary alloy had been presumed to have a face centered cubic or hexagonal unit cell. Recently, the crystal system of the precipitate was confirmed to be a H.C.P. unit cell through the high resolution transmission electron microscopy (HRTEM) and electron diffraction. The crystal system of the metastable phase in the Al-Mg{sub 2}Si alloy containing excess silicon is not yet precisely determined, although the crystal structure is assumed to be the same as the metastable phase formed in an Al-Mg{sub 2}Si pseudo-binary alloy. In this study, the crystal system of the metastable phase in an Al-1.0mass% Mg{sub 2}Si alloy containing 0.4mass% silicon in excess was investigated using transmission electron microscopy (TEM). A new phase with a hexagonal lattice was found in the present alloy. Both the lattice parameter and the orientation relationship with the matrix are different from those of the metastable phase formed in a pseudo-binary Al-Mg{sub 2}Si alloy.
- OSTI ID:
- 55424
- Journal Information:
- Scripta Metallurgica et Materialia, Journal Name: Scripta Metallurgica et Materialia Journal Issue: 8 Vol. 32; ISSN 0956-716X; ISSN SCRMEX
- Country of Publication:
- United States
- Language:
- English
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