Effect of Current Carrying Length in Electric Pulse Aided Deformation

Subrahmanyam, A. and Dakaiah, M. and Verma, Rahul Kumar and Reddy, N Venkata (2022) Effect of Current Carrying Length in Electric Pulse Aided Deformation. In: 5th International Conference on Mechanical, System, and Control Engineering, ICMSC 2021, 28 May 2021 through 30 May 2021, Kazan.

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Abstract

Application of electric pulses during plastic deformation of a metal results in reduction of flow stress. This reduction can be due to both thermal and athermal effects. Increase in the mobility of dislocations due to electron wind is known as electroplastic effect. Almost all the studies on electric pulse aided tensile tests, current is applied through the entire specimen and it contributes to higher joule heating. In this work, electric pulse aided tensile tests are carried out on modified specimens with a provision to apply the electric current through centre portion of gauge length of specimen to reduce the overall joule heating. Finite element simulations are carried out to validate the specimen geometry in terms of stress strain behaviour. Results of single pulse experiments show that there is a significant effect of current carrying length on instantaneous stress drop (increased from 70 MPa to 122.5 MPa when length increased from 30 to 60 mm). Multiple pulse experimental results revealed that specimen with high current carrying length experienced a higher temperature because of accumulation of heat. Comparison of stress drops with electric pulse aid with that of corresponding temperatures with only thermal aid shows that electric pulse caused higher stress drop. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

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IITH Creators:

IITH Creators	ORCiD
Reddy, N Venkata	UNSPECIFIED

Item Type:

Conference or Workshop Item (Paper)

Additional Information:

Acknowledgements Authors would like to thank MHRD (GoI), DHI (GoI) and TATA STEEL for the financial support under Uchchatar Avishkar Yojana (UAY). Authors would also like to thank Dr. Rajesh Korla, Department of Materials Science and Metallurgical Engineering, IIT Hyderabad for allowing us to use high temperature tensile test facility.

Uncontrolled Keywords:

Electroplastic effect; Joule heating; Stress drop

Subjects:

Physics > Mechanical and aerospace

Divisions:

Department of Mechanical & Aerospace Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

26 Jul 2022 09:05

Last Modified:

26 Jul 2022 09:05