The microstructure and tensile properties of a splat-quenched A1-Cu-Li-Mg-Zr alloy
The microstructure and tensile behavior of an A1-3Cu-1.6Li-0.8Mg-0.2Zr alloy produced by slatquenched powder metallurgy processing were studied. The alloy exhibited homogeneous deformation both in bulk samples and during in situ TEM studies. This is in contrast to the strain localization frequently observed in Mg-free A1-Cu-Li-X alloys. The difference in deformation mode is attributed to a fine distribution of S' (A1/sub 2/CuMg) which precipitates up to the grain boundaries. A processing treatment involving 2 pct stretch prior to aging resulted in a yield strength of 555 MPa, a reduction in area of 29 pct, and a strain to fracture of 8.8 pct. This represents an improvement in properties compared with 7075-T76 having a similar texture.
- Research Organization:
- ARCO Metals Ct., Arlington Heights, IL
- OSTI ID:
- 6026373
- Journal Information:
- Metall. Trans., A; (United States), Vol. 15A:7
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALUMINIUM ALLOYS
MICROSTRUCTURE
TENSILE PROPERTIES
COPPER ALLOYS
LITHIUM ALLOYS
AGING
DEFORMATION
MAGNESIUM ADDITIONS
QUENCHING
TRANSMISSION ELECTRON MICROSCOPY
ZIRCONIUM ADDITIONS
ALLOYS
CRYSTAL STRUCTURE
ELECTRON MICROSCOPY
MAGNESIUM ALLOYS
MECHANICAL PROPERTIES
MICROSCOPY
ZIRCONIUM ALLOYS
360103* - Metals & Alloys- Mechanical Properties
360102 - Metals & Alloys- Structure & Phase Studies