Microstructure and mechanical behavior of Al-Li-Cu-Mg alloy 8090 microalloyed with V and Be

Journal Article · Fri Jan 01 00:00:00 EST 1993 · Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States)

DOI:https://doi.org/10.1007/BF02669607· OSTI ID:6354222

Luo, A; Youdelis, W V ^[1]

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1. Univ. of Windsor, ON (Canada)

The effects of microadditions of V and Be on age-hardening, microstructure, and mechanical behavior of Al-Li-Cu-Mg alloy 8090 are investigated. Small additions of V and Be significantly increase the peak hardness and mechanical properties of the alloy aged at 190 C. A transmission electron microscopy (TEM), scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS), optical, and X-ray diffraction investigation shows a higher S' (Al[sub 2]CuMg) precipitate density for alloys containing V and Be, indicating an enhanced nucleation rate for S[prime] precipitation. The V and Be additions are more effective than prior-aging deformation for increasing the yield strength of age-hardened 8090 alloy. The V addition increases ductility significantly, which is attributed to the homogeneous distribution of slip lines and extensive cross slip that occurs during deformation of the V-containing alloy.

• OSTI ID: 6354222
• Journal Information: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States), Vol. 24:1; ISSN 0360-2133
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
BERYLLIUM
METALLURGICAL EFFECTS
COPPER ALLOYS
LITHIUM ALLOYS
MAGNESIUM ALLOYS
VANADIUM
AGING
BERYLLIUM ADDITIONS
DEFORMATION
DUCTILITY
EXPERIMENTAL DATA
HARDENING
HARDNESS
OPTICAL MICROSCOPY
PHASE DIAGRAMS
PRECIPITATION
SAMPLE PREPARATION
SCANNING ELECTRON MICROSCOPY
TRANSMISSION ELECTRON MICROSCOPY
VANADIUM ADDITIONS
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY
YIELD STRENGTH
ALKALINE EARTH METALS
ALLOYS
BERYLLIUM ALLOYS
COHERENT SCATTERING
DATA
DIAGRAMS
DIFFRACTION
ELECTRON MICROSCOPY
ELEMENTS
INFORMATION
METALS
MICROSCOPY
NUMERICAL DATA
SCATTERING
SEPARATION PROCESSES
SPECTROSCOPY
TENSILE PROPERTIES
TRANSITION ELEMENTS
VANADIUM ALLOYS
360102* - Metals & Alloys- Structure & Phase Studies
360103 - Metals & Alloys- Mechanical Properties