Effect of 3 Points Bending Process on Microstructure Evolution and Damage Characteristics of Dual Phase High Strength Steel Sheets JSC980Y

Authors

  • Natthasak Pornputsiri Department of Industrial and Production Engineering, Faculty of Industry and Technology, Rajamangala University of Technology Rattanakosin, Thailand
  • Pongsakorn L eetrakul Department of Industrial and Production Engineering, Faculty of Industry and Technology, Rajamangala University of Technology Rattanakosin, Thailand

Keywords:

Bending process, Warm forming, Spring-back, Failure mechanisms, Sheet metal forming

Abstract

This study used dual phase high strength steel sheets metal JSC980Y of 1 millimeter size thickness, as a conventional used in the process of forming automotive parts. Cracking and tearing occur due to its high strength property resulting in brittleness at room temperature. To avoid this phenomenon and increases of formability, bending was carried out by applying the warm temperature treatments at 200 ºC, 400 ºC and 600 ºC, compared with the bending test at room temperature. 3-Point bending processes were performed with different bending angles (0-75º) by a 0.25 millimeter punch tip radius. The experiment results showed that, the bending temperature directly affects the formability and the springback angle of the dual phase sheet metal. When the temperature was increased, springback angle tended to increase and the springback angle maximum occurred at the bending temperature of 400 °C because this temperature range was effect on microstructure changes of dual phase steel. Furthermore, when the bending temperature was increased, it directly affected to microstructure and failure characteristics on the bending surface of the finished product.

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Published

2021-12-30

How to Cite

[1]
N. Pornputsiri and P. L. eetrakul, “Effect of 3 Points Bending Process on Microstructure Evolution and Damage Characteristics of Dual Phase High Strength Steel Sheets JSC980Y ”, UTK RESEARCH JOURNAL, vol. 15, no. 2, pp. 84–94, Dec. 2021.

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Section

Research Articles