Effect of tempering temperature on microstructure and mechanical properties of low alloy steel in quenched tempered conditions

Authors

V Yadav
A K. Singh
G Sahoo

Publication Date

2018-07-01

Abstract

The effect of tempering temperature on the microstructure and mechanical properties of a low alloy steel has been investigated using optical microscopy, hardness testing and Charpy V-notch impact testing at -20°C, -40°C and -60°C. At first, the laboratory based study revealed that tempering the specimens at 650°C resulted in lowest hardness with highest impact energy. Based on this, the heat-treated industrial steel showed sufficiently high toughness after Charpy V-notch impact testing at -40°C. Fractography after impact testing showed predominately ductile dimple rupture in the sample tempered at 650°C. The presence of decomposed martesitic laths in prior austenite was noticed in the specimens tempered at 650°C and 680°C.

First Page

16

Last Page

21

Recommended Citation

Yadav, V; Singh, A K.; and Sahoo, G (2018) "Effect of tempering temperature on microstructure and mechanical properties of low alloy steel in quenched tempered conditions," Journal of Metals, Materials and Minerals: Vol. 28: No. 1, Article 4.
Available at: https://digital.car.chula.ac.th/jmmm/vol28/iss1/4