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

Journal Article · Mon Jan 01 04:00:00 EST 1996 · Scripta Materialia

DOI:https://doi.org/10.1016/1359-6462(95)00486-6· OSTI ID:186773

Chu, K C; Jeng, S C; Liu, T F ^[1]

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1. National Chiao Tung Univ., Hsinchu (Taiwan, Province of China). Inst. of Materials Science and Engineering

Recently, the authors made transmission electron microscopy observations on the phase transformations of a Cu{sub 2.2}Mn{sub 0.8}Al alloy. Based on this study, it is found that the microstructure of the alloy in the as-quenched condition or aged at 300 C was a mixture of (D0{sub 3} + L2{sub 1} + L-J) phases, where the L-J phase is a new phase having an orthorhombic structure with lattice parameters a = 0.413 nm, b = 0.254 nm and c = 0.728 nm. This result is quite different from that reported by other workers. However, to date, all of examinations were focused on the Cu{sub 3{minus}x}Mn{sub x}Al alloy with varying manganese content. Little information concerning the Cu-Mn-Al alloy with higher aluminum content has been provided. Therefore, the purpose of the present study is to investigate the as-quenched microstructure of the Cu-24.8Mn-30.0Al alloy.

• OSTI ID: 186773
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 1 Vol. 34; ISSN 1359-6462; ISSN XZ503X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CHEMICAL COMPOSITION
COPPER ALLOYS
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
HEAT TREATMENTS
LATTICE PARAMETERS
MANGANESE ALLOYS
MICROSTRUCTURE
ORTHORHOMBIC LATTICES
PHASE DIAGRAMS
QUENCHING
SAMPLE PREPARATION
TRANSMISSION ELECTRON MICROSCOPY