As-quenched microstructure of a Cu-24.8Mn-30.0Al alloy

The as-quenched microstructure of chill cast Cu-24.8Mn-30.0Al specimens that had been homogenized at 850 deg C for 72 h, sectioned, heat treated at 850 deg C for 1 h and rapidly quenched into iced brine were studied using a scanning transmission electron microscope equipped with energy dispersive x...

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Veröffentlicht in:	Scripta Materialia 1996, Vol.34 (1), p.83-87
Hauptverfasser:	Chu, K.C., Jeng, S.C., Liu, T.F.
Format:	Artikel
Sprache:	eng
Schlagworte:	ALUMINIUM ALLOYS Applied sciences CHEMICAL COMPOSITION Cold working, work hardening annealing, post-deformation annealing, quenching, tempering recovery, and crystallization Cold working, work hardening annealing, quenching, tempering, recovery, and recrystallization textures COPPER ALLOYS Cross-disciplinary physics: materials science rheology CRYSTAL STRUCTURE CRYSTAL-PHASE TRANSFORMATIONS Exact sciences and technology HEAT TREATMENTS LATTICE PARAMETERS MANGANESE ALLOYS MATERIALS SCIENCE Metals. Metallurgy MICROSTRUCTURE ORTHORHOMBIC LATTICES PHASE DIAGRAMS Physics QUENCHING SAMPLE PREPARATION TRANSMISSION ELECTRON MICROSCOPY Treatment of materials and its effects on microstructure and properties
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Zusammenfassung:	The as-quenched microstructure of chill cast Cu-24.8Mn-30.0Al specimens that had been homogenized at 850 deg C for 72 h, sectioned, heat treated at 850 deg C for 1 h and rapidly quenched into iced brine were studied using a scanning transmission electron microscope equipped with energy dispersive x ray spectrometer. Quantitative analyses of elemental concentrations for Cu, Mn and Al were made. The microstructure was found to be a mixture of (L2 sub 1 +B2+L-J) phases. The increase of Al content enhanced the formation of the L-J precipitate.
ISSN:	1359-6462 1872-8456
DOI:	10.1016/1359-6462(95)00486-6