Experimental Investigation of Electrically-Assisted Stretch Forming of 304Stainless Steel and carbon Steel Using Continuous and Pulsed Currents

osama sohaib; Alaa Daham

doi:10.71229/pptq0b98

Authors

Osama Sohaib Department of Mechanical Engineering Mosul University College, Mousul, Iraq, Iraq https://orcid.org/0009-0008-9151-7115
Alaa Daham Younis Department of Mechanical Engineering Mosul University College, Mousul, Iraq, Iraq

DOI:

https://doi.org/10.71229/pptq0b98

Keywords:

Electrically Assisted Stretch Forming, Electroplastic effect, Formability, electron wind, Pulsed DC Current, Stretch Forming

Abstract

Stretch forming is a common procedure in sheet metal manufacturing, and it is often applies force to create parts with complex geometrical shapes. It becomes very important to obtain an understanding and optimization of parameters for improving the manufacturing process of the present time.

However, one of the main disadvantages of using the traditional stretch forming technology is the requirement for high forces that could lead to defects in manufacturing, tool wear, and low stretchability of the materials. To overcome the limitations, the application of the electroplastic effect to reduce processing resistance is studied in the present work using two power-generation methods: continuous and pulsed DC.

experimental studies on carbon steel and 304 grade stainless steel plates, it can be seen that using both DC continuous currents and pulsed currents causes a decrease in the forming force. It is found that force decreases by 6.95%–8.40% for carbon steel and 14.37%–17.87% for stainless steel 304, depending on the type of current used. Besides, pulsed current becomes more effective for decreasing the forming force when the value of current becomes smaller. In addition to this, good correlations are found between experimental and theoretical calculations, especially when the current is in the form of DC current.

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