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Microstructure evolution and fatigue behavior of 2124 aluminum processed by ECAE with back pressure

journal contribution
posted on 2006-06-15, 00:00 authored by Rimma Lapovok, C Loader, F H Dalla Torre, S L Semiatin
Microstructure evolution, workability, and post-working fatigue behavior were established for aluminum alloy 2124-T851 processed via equal channel angular extrusion (ECAE) with back pressure. ECAE without back pressure resulted in complete fracture during the first pass. On the other hand, ECAE with back pressure enabled the production of sound material with significant grain refinement to the nano-scale. In contrast to typical property trends, an attractive combination of tensile ductility and LCF fatigue life was obtained as well as improved strength and HCF fatigue life compared to coarse-grained material in the as-received (T851) condition.

History

Journal

Materials science and engineering: A

Volume

425

Issue

1-2

Pagination

36 - 46

Publisher

Elsevier

Location

Amsterdam, The Netherlands

ISSN

0921-5093

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2006, Elsevier B.V.