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

Authors

  • Vaibhav Yadav National Institute of Foundry and Forge Technology
  • Anil Kumar Singh National Institute of Foundry and Forge Technology
  • Gadadhar Sahoo R & D Centre for Iron and Steel, SAIL

Keywords:

Austenization, Impact testing, Quenching, Tempering

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.

Downloads

Download data is not yet available.

Author Biography

Gadadhar Sahoo, R & D Centre for Iron and Steel, SAIL

Senior Manager, JSPS Fellow.

References

G. Krauss, Steels: Processing, Structure, and Performance. Ohio: ASM International, 2005.

W. Yan, L. Zhu, W. Sha, Y. Shan, and K. Yang, “Change of Tensile Behavior of a High-Strength Low-Alloy Steel With Tempering Temperature,” Material Science and Engineering, vol. 517A, pp. 369-374, 2009.

W. S. Lee and T. T. Su, “Mechanical Properties and Microstructure Features of AISI 4340 HighStrength Alloy Steel Under Quenched and Tempered Conditions,” Journal of Materials Processing Technology, vol. 87, pp. 198, 1999.

A. A. Barani and D. Ponge, “Optimized thermomechanical Treatment for strong and ductile martensitic steels,” Materials Science Forum, vol. 539-543, pp. 4526-4531, 2007.

H. Bhadeshia and R. Honeycombe, Steels: Microstructure and Properties, Tempering of Martensite. USA: Elsevier Ltd., 2006.

B. Smoljan, D. Iljkic, and F. Traven, Journal of Mechanical Engineering, vol. 56, pp. 115- 120, 2010.

S. K. Das and G. Thomas, “Structure and mechanical properties of Fe–Ni–Co–C steels,” Transactions of the American Society for Metals, vol. 62, pp. 659–668, 1969.

C. A. Siebert, D. V. Doane, and D. H. Breen, The hardenability of steels. Ohio: ASM, 1977.

D. T. Pierce, J. A. Jiménez, J. Bentley, D. Raabe, and J. E. Wittig, “The influence of stacking fault energy on the microstructural and strain hardening evolution of Fe–Mn–Al– Si steels during tensile deformation,” Acta Materialia, vol. 100, pp. 178–190, 2015.

K. Jeong, J. E. Jin, Y. S. Jung, S. Kang, and Y. Lee, “The effects of Si on the mechanical twinning and strain hardening of Fe–18Mn– 0.6C twinning-induced plasticity steel,” Acta Materialia, vol. 61, pp. 3399–3410, 2013.

M. Cai, H. Ding, Y. Lee, S. Tang and J. Zhang, “Effects of Si on Microstructural Evolution and Mechanical Properties of Hotrolled Ferrite and Bainite Dual-phase Steels,” ISIJ International, vol. 51, pp. 476–481, 2011.

K. D. Sibley and N. N. Breyer, “The Effect of Silicon on the Impact and Tensile Properties of Low-Carbon Steels,” Metallurgical Transactions A, vol. 7A, pp. 1602-1604, 1976.

L. A. Norstrom, and O. Vingsbo, “Influence of nickel on toughness and ductile-brittle transition in low-carbon marten·site steels,” Metal Science, vol. 13, pp. 677-684, 1979.

A. V. Nikolaeva, Y. A. Nikolaev, and Y. R. Kevorkyan, “Grain-boundary segregation of phosphorus in low-alloy steel,” Atomic Energy, vol. 91, pp. 534-542, 2001.

J. R. Davis, Properties and Selection: Iron, Steel, and High-Performances Alloys. Ohio: ASM International, 1990.

H. P. Hougardy, Werkstoffkunde Stahl Band 1: Grundlagen. Düsseldorf: Verlag Stahleisen GmbH, 1984.

D. C. Saha, E. Biro, A. P. Gerlich, and Y. Zhou, “Effects of tempering mode on the structural changes of martensite,” Materials Science & Engineering A, vol. 673, pp. 467– 475, 2016.

T Hanamura, S Torizuka, S Tamura, S Enokida and H Takechi "Effect of Austenite Grain Size on Transformation Behavior, Microstructure and Mechanical Properties of 0.1C–5Mn Martensitic Steel," ISIJ International, vol. 53, pp. 2218–2225, 2013.

Downloads

Published

2018-06-27

How to Cite

[1]
V. . Yadav, A. K. Singh, and G. Sahoo, “Effect of tempering temperature on microstructure and mechanical properties of low alloy steel in quenched tempered conditions”, J Met Mater Miner, vol. 28, no. 1, Jun. 2018.

Issue

Vol. 28 No. 1 (2018)

Section

Original Research Articles

License

Copyright (c) 2018 Journal of Metals, Materials and Minerals

Creative Commons License

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

Authors who publish in this journal agree to the following terms:

    1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.

 

    1. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.