The compositions of metastable phase precipitates observed at peak hardness condition in an Al-Mg-Si alloy

S. K. Son; S. Matsumura; K. Fukui; M. Takeda

doi:10.1016/j.jallcom.2010.08.151

The compositions of metastable phase precipitates observed at peak hardness condition in an Al-Mg-Si alloy

S. K. Son, S. Matsumura, K. Fukui, M. Takeda

Quantum Sciences of Materials

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21 Citations (Scopus)

Abstract

The metastable-phase precipitates which appear at the peak condition of hardness in an Al-0.83 at%Mg-0.4 at%Si alloy were investigated, using a combination of Vickers microhardness tests, DSC calorimetry, and field-emission STEM observations with EDX analyses. EDX and elemental mapping revealed that both Si-rich and Mg-Si precipitates with needle-shapes were present. EDX analysis showed that needle-shaped β″precipitates protruding from the specimen foils were composed mainly of Si. The present results on structures, compositions and thermal stabilities of the precipitates suggest that Si-rich precipitates co-exist with complex Mg-Si precipitates also of needle-shape.

Original language	English
Pages (from-to)	241-245
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	509
Issue number	2
DOIs	https://doi.org/10.1016/j.jallcom.2010.08.151
Publication status	Published - Jan 12 2011

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2010.08.151

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abstract = "The metastable-phase precipitates which appear at the peak condition of hardness in an Al-0.83 at%Mg-0.4 at%Si alloy were investigated, using a combination of Vickers microhardness tests, DSC calorimetry, and field-emission STEM observations with EDX analyses. EDX and elemental mapping revealed that both Si-rich and Mg-Si precipitates with needle-shapes were present. EDX analysis showed that needle-shaped β″precipitates protruding from the specimen foils were composed mainly of Si. The present results on structures, compositions and thermal stabilities of the precipitates suggest that Si-rich precipitates co-exist with complex Mg-Si precipitates also of needle-shape.",

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T1 - The compositions of metastable phase precipitates observed at peak hardness condition in an Al-Mg-Si alloy

AU - Son, S. K.

AU - Matsumura, S.

AU - Fukui, K.

AU - Takeda, M.

PY - 2011/1/12

Y1 - 2011/1/12

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AB - The metastable-phase precipitates which appear at the peak condition of hardness in an Al-0.83 at%Mg-0.4 at%Si alloy were investigated, using a combination of Vickers microhardness tests, DSC calorimetry, and field-emission STEM observations with EDX analyses. EDX and elemental mapping revealed that both Si-rich and Mg-Si precipitates with needle-shapes were present. EDX analysis showed that needle-shaped β″precipitates protruding from the specimen foils were composed mainly of Si. The present results on structures, compositions and thermal stabilities of the precipitates suggest that Si-rich precipitates co-exist with complex Mg-Si precipitates also of needle-shape.

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The compositions of metastable phase precipitates observed at peak hardness condition in an Al-Mg-Si alloy

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