Investigation of mechanical properties of advanced Al–Zn–Mg–Cu alloy

C. H.J. Davies, N. Raghunathan, T. Sheppard

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The mechanical properties of the rapidly solidified 7000 series powder alloy CW 67 were investigated for various extrusion and heat treatment conditions. The principal aim of the work was to ascertain the optimum processing route for peak aged (T6) material. The highest proof stress in the T6 condition was found to be 572 MN m−2 for material extruded at 325°C and aged for 13·5 h at 120°C after solutionising. The ductility of this material was found to be 13·5%. The fracture toughness was measured in two orientations and found to be approximately 21 MN m−3/2 in the short transverse direction and 44 MN m−3/2 in the longitudinal direction. Degassing and hot compaction was found to improve the fracture toughness of the material substantially.

Original languageEnglish
Pages (from-to)862-868
Number of pages7
JournalMaterials Science and Technology
Issue number10
Publication statusPublished - 1 Jan 1992
Externally publishedYes

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