Interface microstructure and bond shear strength of aluminum alloy AA8090/AA7072 roll clad sheets

Aeronautical grade aluminum alloys are normally roll clad by Al-1 wt% Zn (alloy AA7072) to improve resistance against atmospheric corrosion. In the present investigation, aluminum-lithium alloy, compositionally equivalent to AA8090, was roll clad to alloy AA7072 under different rolling conditions, a...

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Bibliographic Details
Published in:Journal of materials science letters 2003-12, Vol.22 (24), p.1793-1795
Main Authors: MALLESHAM, P, GOKHALE, A. A, DUTTA, A, MURTI, V. S. R
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Metallic coatings
Metals. Metallurgy
Production techniques
Surface treatment
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Summary:Aeronautical grade aluminum alloys are normally roll clad by Al-1 wt% Zn (alloy AA7072) to improve resistance against atmospheric corrosion. In the present investigation, aluminum-lithium alloy, compositionally equivalent to AA8090, was roll clad to alloy AA7072 under different rolling conditions, and its interface microstructure and bond shear strength studied. Al-Li based alloy AA8090 and alloy AA7072 were prepared by the ingot metallurgy route. After homogenization at 535 deg C, the plates were scalped by shaping, with 0.5 mm as the depth of cut and 1 mm per stroke as the feed. The machined plate dimensions were: 280 x 235 x 35 mm. Both the plates were rolled to 6 mm after initial soaking at 475 deg C and subsequent intermediate soaking at 24, 17, 12 and 8 mm thickness. Several samples of size 200 x 100 mm were cut from each plate for roll cladding.
ISSN:0261-8028
DOI:10.1023/B:JMSL.0000005423.90152.a6