In situ observation of partial melting in superplastic aluminum alloy composites at high temperatures

J. Koike; M. Mabuchi; K. Higashi

doi:10.1016/0956-7151(95)90275-9

In situ observation of partial melting in superplastic aluminum alloy composites at high temperatures

J. Koike, M. Mabuchi, K. Higashi

Research output: Contribution to journal › Article › peer-review

150 Citations (Scopus)

Abstract

The possibility of partial melting and its relations to the superplasticity at high strain rates were studied with transmission electron microscopy and differential scanning calorimetry in AlCuMg (2124), AlMg (5052), and AlMgSi (6061) alloys reinforced with Si₃N₄ particles. Calorimetry measurements of all three composites showed a sharp endothermic peak at an optimum superplastic temperature. At the same temperature, transmission electron microscopy showed the melting of grain boundaries and interfaces, suggesting direct correlations between partial melting and the superplasticity. Solute segregation was also observed at boundaries and interfaces, and was discussed as causes for partial melting.

Original language	English
Pages (from-to)	199-206
Number of pages	8
Journal	Acta Metallurgica Et Materialia
Volume	43
Issue number	1
DOIs	https://doi.org/10.1016/0956-7151(95)90275-9
Publication status	Published - 1995 Jan 1
Externally published	Yes

ASJC Scopus subject areas

Engineering(all)

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10.1016/0956-7151(95)90275-9

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abstract = "The possibility of partial melting and its relations to the superplasticity at high strain rates were studied with transmission electron microscopy and differential scanning calorimetry in AlCuMg (2124), AlMg (5052), and AlMgSi (6061) alloys reinforced with Si3N4 particles. Calorimetry measurements of all three composites showed a sharp endothermic peak at an optimum superplastic temperature. At the same temperature, transmission electron microscopy showed the melting of grain boundaries and interfaces, suggesting direct correlations between partial melting and the superplasticity. Solute segregation was also observed at boundaries and interfaces, and was discussed as causes for partial melting.",

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N2 - The possibility of partial melting and its relations to the superplasticity at high strain rates were studied with transmission electron microscopy and differential scanning calorimetry in AlCuMg (2124), AlMg (5052), and AlMgSi (6061) alloys reinforced with Si3N4 particles. Calorimetry measurements of all three composites showed a sharp endothermic peak at an optimum superplastic temperature. At the same temperature, transmission electron microscopy showed the melting of grain boundaries and interfaces, suggesting direct correlations between partial melting and the superplasticity. Solute segregation was also observed at boundaries and interfaces, and was discussed as causes for partial melting.

AB - The possibility of partial melting and its relations to the superplasticity at high strain rates were studied with transmission electron microscopy and differential scanning calorimetry in AlCuMg (2124), AlMg (5052), and AlMgSi (6061) alloys reinforced with Si3N4 particles. Calorimetry measurements of all three composites showed a sharp endothermic peak at an optimum superplastic temperature. At the same temperature, transmission electron microscopy showed the melting of grain boundaries and interfaces, suggesting direct correlations between partial melting and the superplasticity. Solute segregation was also observed at boundaries and interfaces, and was discussed as causes for partial melting.

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In situ observation of partial melting in superplastic aluminum alloy composites at high temperatures

Abstract

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