Authors: Jinwoo Lee SeJong Kim MyoungGyu Lee Jung Han Song Seogou Choi Heung Nam Han Daeyong Kim
Publish Date: 2016/04/06
Volume: 47, Issue: 6, Pages: 2783-2794
Abstract
The uniaxial tensile and compressive stress–strain responses of AZ31B magnesium alloy sheet under pulsed electric current are reported Tension and compression tests with pulsed electric current showed that flow stresses dropped instantaneously when the electric pulses were applied Thermo–mechanical–electrical finite element analyses were also performed to investigate the effects of Joule heating and electroplasticity on the flow responses of AZ31B sheets under electricpulsed tension and compression tests The proposed finite element simulations could reproduce the measured uniaxial tensile and compressive stress–strain curves under pulsed electric currents when the temperaturedependent flow stress hardening model and thermal properties of AZ31B sheet were properly described in the simulations In particular the simulation results that fit best with experimental results showed that almost 100 pct of the electric current was subject to transform into Joule heating during electrically assisted tensile and compressive testsThis work was supported by a Grant NoB551179130203 from the Cooperative Research Project funded by the Korean government MSIP Republic of Korea Assistance of Yong Chan Her in mechanical testing at KIMS is gratefully acknowledged HNH was supported by the National Research Foundation of Korea NRF grant funded by the Ministry of Science ICT Future Planning MSIP NO NRF2015R1A5A1037627 MGL appreciate the support from NRF NO NRF2014R1A2A1A11052899
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