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Climb enabled discrete dislocation plasticity of superalloys

Ayas, C and Deshpande, V (2015) Climb enabled discrete dislocation plasticity of superalloys. In: UNSPECIFIED pp. 981-986..

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© (2015) Trans Tech Publications, Switzerland. Ni-based superalloys comprising of elastic particles embedded in a single crystal elastic-plastic matrix are usually subject to loading at elevated service temperatures. In order to enhance the understanding of high temperature deformation mechanisms a two dimensional discrete dislocation plasticity framework wherein the dislocations movement that incorporates both glide and climb is formulated. The climbing dislocations are modelled as point sources/sinks of vacancies and the vacancy diffusion boundary value problem is solved by superposition of the vacancy concentration fields of the point sources/sinks in an infinite medium and a complementary non-singular solution that enforces the relevant boundary conditions. The vacancy concentration field along with the Peach-Kohler force provides the climb rate of the dislocations.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Divisions: Div C > Materials Engineering
Depositing User: Cron Job
Date Deposited: 01 Aug 2017 02:17
Last Modified: 15 Sep 2020 05:30
DOI: 10.4028/