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Mechanical and microstructural characterization of aluminum 6061 processed by plane stress local torsion

journal contribution
posted on 2014-01-01, 00:00 authored by A H Shamdani, Shahin Khoddam
The process of plane stress local torsion (PSLT) has been recently proposed as localized severe plastic deformation to enhance the mechanical properties of the fastener holes. The PSLT process can create large shear strains and, consequently, substantial grain refinement in the vicinity of the hole with a gradient in the radial direction. It is of great interest and importance to investigate the effect of the PSLT process on a range of materials commonly used in the industry. An introductory investigation of mechanical and microstructural properties of Al6061 samples processed by the PSLT is performed in this work. The PSLT is simulated using the finite-element method, and the torque twist curves obtained from finite-element simulations are compared with experimental measurements. Microstructural changes and the extent of grain refinement are investigated by means of optical microscopy. It is shown that the PSLT is responsible for a considerable improvement in the mechanical properties within the deformation zone. The microhardness tests were used to measure the degree of enhancement in ultimate and yield strengths of the material processed by the PSLT. © The Minerals, Metals & Materials Society and ASM International 2013.

History

Journal

Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science

Volume

45

Issue

2

Pagination

507 - 514

ISSN

1073-5615

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2013, The Minerals, Metals & Materials Society and ASM International

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