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Application of high-energy oscillating electric current pulse to relieve pulsed-laser surface irradiation induced residual stress in AISI 1045 steel

Published online by Cambridge University Press:  03 November 2016

Bang-ping Gu ,
Jin-tao Lai ,
Xiong Hu ,
Zi-di Jin ,
Hui Zhou ,
Zhen-sheng Yang  and
Long Pan
Bang-ping Gu*
Affiliation:
College of Logistics Engineering, Shanghai Maritime University, Shanghai 201306, People's Republic of China; and Zhejiang Province Key Laboratory of Advanced Manufacturing Technology, Zhejiang University, Hangzhou 310027, People's Republic of China
Jin-tao Lai
Affiliation:
Department of Mechanical and Electrical Engineering, Shaoxing University, Shaoxing 312000, People's Republic of China
Xiong Hu
Affiliation:
College of Logistics Engineering, Shanghai Maritime University, Shanghai 201306, People's Republic of China
Zi-di Jin
Affiliation:
Zhejiang Province Key Laboratory of Advanced Manufacturing Technology, Zhejiang University, Hangzhou 310027, People's Republic of China; and Beijing Geolight Technology Co., Ltd., Beijing 102628, People's Republic of China
Hui Zhou
Affiliation:
Human Factors Research Unit, Institute of Sound and Vibration Research, University of Southampton, Southampton SO17 1BJ, UK
Zhen-sheng Yang
Affiliation:
College of Logistics Engineering, Shanghai Maritime University, Shanghai 201306, People's Republic of China
Long Pan
Affiliation:
Zhejiang Province Key Laboratory of Advanced Manufacturing Technology, Zhejiang University, Hangzhou 310027, People's Republic of China
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

The high-energy oscillating electric current pulse (ECP) technology was introduced to relieve the residual stresses in the small AISI 1045 steel specimens treated by the pulsed-laser surface irradiation. The high-energy oscillating ECP stress relief experiments were conducted to study the effectiveness of the high-energy oscillating ECP technology. In addition, the electroplasticity framework was developed based on the thermal activation theory to reveal the mechanism of the high-energy oscillating ECP stress relief. The results show that the high-energy oscillating ECP stress relief has good effects on eliminating the residual stress. Furthermore, the residual stress relieving mechanism of the high-energy oscillating ECP stress relief can be attributed to the electric softening effect and the dynamic stress effect. The findings confirm that the significant effects of high-energy oscillating ECP on metal plasticity and provide a basis to understand the underlying mechanism of the high-energy oscillating ECP stress relief.

Keywords

oscillating electric current pulseelectroplasticitypulsed-laserresidual stresselectric softening effectdynamic stress effect
Type
Articles
Information
Journal of Materials Research , Volume 32 , Issue 2 , 27 January 2017 , pp. 473 - 481
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Copyright
Copyright © Materials Research Society 2016 

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