Reduced fracturing of intermetallic particles during crack propagation in age hardening Al-based alloys due to PFZs
Reduced fracturing of intermetallic particles during crack propagation in age hardening Al-based alloys due to PFZs
Based on a shear lag model approach, a simple analytic model for the stress shielding of intermetallic particles due to the presence of a weakened precipitate free zone (PFZ) is derived. The PFZ desensitises the material to the breaking of particles. For the S and ? phase particles in the 2091 aluminium based alloy, particles with average sizes in the range 3–15 ?m receive effective shielding from matrix stresses, which raise the matrix stress required to break the particle, and causes a propensity for larger particles to break at smaller applied macroscopic stress.
precipitate free zone, intermetallic, crack propagation, toughness, ageing, strength
260-264
Starink, M.J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
2005
Starink, M.J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Starink, M.J.
(2005)
Reduced fracturing of intermetallic particles during crack propagation in age hardening Al-based alloys due to PFZs.
Materials Science and Engineering: A, 390 (1-2), .
(doi:10.1016/j.msea.2004.09.053).
Abstract
Based on a shear lag model approach, a simple analytic model for the stress shielding of intermetallic particles due to the presence of a weakened precipitate free zone (PFZ) is derived. The PFZ desensitises the material to the breaking of particles. For the S and ? phase particles in the 2091 aluminium based alloy, particles with average sizes in the range 3–15 ?m receive effective shielding from matrix stresses, which raise the matrix stress required to break the particle, and causes a propensity for larger particles to break at smaller applied macroscopic stress.
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Published date: 2005
Keywords:
precipitate free zone, intermetallic, crack propagation, toughness, ageing, strength
Organisations:
Engineering Sciences
Identifiers
Local EPrints ID: 22920
URI: http://eprints.soton.ac.uk/id/eprint/22920
ISSN: 0921-5093
PURE UUID: 19c3098f-7085-4545-8717-454d72a735f4
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Date deposited: 17 Mar 2006
Last modified: 15 Mar 2024 06:42
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