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| The effects of heterogeneous deformation on void growth in FCC crystals |
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Abstract To investigate the influence of crystallographic orientation and deformation mismatch on the growth and coalescence of spherical void, a unit cell was used to address the growth behavior of voids in single crystals and voids located at grain boundary in FCC crystals with the three dimensional crystal plasticity finite element method, which was implemented with the rate dependent crystal plasticity theory as user material subroutine. Simulation results show that the void shape and growth direction significantly depend on the crystallographic orientation, and the growth rate of voids at the grain boundary of the two-grain is faster than that in single crystal. Due to inter-grain heterogeneous deformation, the growth of void located at the grain boundary accelerated, and the material trends to fail by intergranular fracture. With the orientation factor’s difference between the two grains increasing, the void prefers to coalescence along grain boundary.
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Received: 16 December 2008
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2010, Vol. 31 
