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Effects of high-frequency vibration on quenched residual stress in Cr12MoV steel

Published online by Cambridge University Press:  20 October 2016

Bang-ping Gu ,
Xiong Hu ,
Jin-tao Lai ,
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
Xiong Hu
Affiliation:
College of Logistics Engineering, Shanghai Maritime University, Shanghai 201306, People's Republic of China
Jin-tao Lai
Affiliation:
Department of Mechanical and Electrical Engineering, Shaoxing University, Shaoxing 312000, 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-frequency vibration technology was introduced to relieve the quenched residual stress in the Cr12MoV steel based on the high-frequency vibration system that mainly consisted of an electromagnetic vibrator and an amplitude boost unit. The high-frequency vibratory stress relief (VSR) experiments were conducted to study the effectiveness of the high-frequency vibration technology. In addition, the high-frequency vibration plasticity model was developed based on the thermal activation theory to reveal the mechanism of the high-frequency VSR. The results show that the high-frequency VSR has good effects on eliminating residual stress, while the surface hardness for the Cr12MoV steel remains almost the same. Moreover, there are no changes in the grain size of the Cr12MoV steel during the high-frequency VSR, while the dislocation density for the Cr12MoV steel during the high-frequency VSR decreases by 27.21%. The decrease of dislocation density in the Cr12MoV steel is the essence of residual stress relaxation. The findings confirm the significant effects of high-frequency vibration on metal plasticity and provide a basis to understand the underlying mechanism of the high-frequency VSR.

Keywords

high-frequency vibrationresidual stressmicrostructuredislocation densityhigh-frequency vibration plasticity
Type
Articles
Information
Journal of Materials Research , Volume 31 , Issue 22 , 28 November 2016 , pp. 3588 - 3596
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Copyright
Copyright © Materials Research Society 2016 

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