High-resolution electron microscopy on the structure of Guinier-Preston zones in an Al-1.6 mass pct Mg{sub 2}Si alloy

Journal Article · Wed Apr 01 04:00:00 EST 1998 · Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science

DOI:https://doi.org/10.1007/s11661-998-0242-7· OSTI ID:616491

Matsuda, K; Gamada, H; Fujii, K; Ikeno, S ^[1]; Uetani, Y ^[2]; Sato, T; Kamio, A ^[3]

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1. Toyama Univ. (Japan). Dept. of Materials Science and Engineering
2. Toyama Prefectural Univ. (Japan). Research Inst. for Tech.
3. Tokyo Inst. of Tech. (Japan). Dept. of Metallurgical Engineering

The structure of the Guinier-Preston (GP) zone in an Al-1.6 mass pct Mg{sub 2}Si alloy aged at 343 and 423 K was investigated by high-resolution transmission electron microscopy (HRTEM). The morphology of the GP zone is that of a fine plate having the dimensions of a monolayer in thickness, 2.5 nm in width, and less than 30 nm in length. Its elongated direction is parallel to the <100>{sub m} direction. The chemical composition of the GP zone in an Al-Mg{sub 2}Si alloy indicated a ratio of Mg/Si = 1.0. The zones aggregate with increasing aging time and exhibit a more complicated morphology because of the transformation to the metastable phase that takes place inside the GP zones.

• Sponsoring Organization: USDOE
• OSTI ID: 616491
• Journal Information: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, Journal Name: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science Journal Issue: 4 Vol. 29; ISSN 1073-5623; ISSN MMTAEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM BASE ALLOYS
CHEMICAL COMPOSITION
GUINIER-PRESTON ZONES
MAGNESIUM ALLOYS
MORPHOLOGY
SILICON ALLOYS