Effect of the Cooling Condition and Corresponding Microstructure on Tensile and Impact Behaviour of Low Carbon Steel (EN8)

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Authors

  • P. Rajendra
     Department of Mechanical Engineering, Ramaiah Institute of Technology, MSR Nagar, MSRIT Post Bengaluru, Karnataka 560054 ,IN
  • K. R. Phaneesh
     Department of Mechanical Engineering, Ramaiah Institute of Technology, MSR Nagar, MSRIT Post Bengaluru, Karnataka 560054 ,IN
  • C. M. Ramesha
     Department of Mechanical Engineering, Ramaiah Institute of Technology, MSR Nagar, MSRIT Post Bengaluru, Karnataka 560054 ,IN
  • Madev Nagaral
     Aircraft Research and Design Centre HAL, Bengaluru, Karnataka 560037 ,IN
  • V. Auradi
     Department of Mechanical Engineering, Siddaganga Institute of Technology, Tumkur, Karnataka 572103 ,IN

DOI:

https://doi.org/10.18311/jmmf/2023/33356

Keywords:

Heat Treatment, Critical cooling Temperature, cooling medium, and Microstructure Examination

Abstract

Steels benefit significantly from the heat treatment and quenching procedure because it modifies mechanical characteristics and affects phase change in the structure. To test EN8 steels, we execute this heat treatment procedure in a variety of quenching media. A few EN8 steel specimens were investigated and evaluated after being heated in the resistance furnace between 760°C and 950°C and then quenched in a different media. As diverse quenching mediums, oil, water, and air are employed. Mechanical characteristics such as hardness using Vickers hardness equipment and the quenched samples hardness were substantially more prominent than the base material. Followed by Charpy impact test is carried out on the samples according to ASTM E-23 and the Vickers hardness test according to ASTM-E92. In the present work, medium carbon steel (EN8) was used, and its composition is shown in the table below. The samples are prepared in 20mm cylindrical bars, which were then machined to final dimensions of 10x10x75 mm3 on a lathe as per the ASTM-E23 and v - cut notch of 2 mm depth the center for impact testing. Tensile testing was conducted using an ASTM-E2 compliant servo-hydraulic machine with a 100 kN load cell. A clip-on extensometer and the result recorded for ultimate tensile strength, increase with fine grains.

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Published

2023-04-12

How to Cite

P. Rajendra, K. R. Phaneesh, C. M. Ramesha, Nagaral, M., & V. Auradi. (2023). Effect of the Cooling Condition and Corresponding Microstructure on Tensile and Impact Behaviour of Low Carbon Steel (EN8). Journal of Mines, Metals and Fuels, 71(1), 51–56. https://doi.org/10.18311/jmmf/2023/33356

Issue

Volume 71, Issue 1, January 2023

Section

Articles

License

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

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