Effect of tempering temperature on microstructure and mechanical properties of low alloy steel in quenched tempered conditions
Keywords:Austenization, Impact testing, Quenching, Tempering
AbstractThe 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 -20Â°C, -40Â°C and -60Â°C. At first, the laboratory based study revealed that tempering the specimens at 650Â°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 -40Â°C. Fractography after impact testing showed predominately ductile dimple rupture in the sample tempered at 650Â°C. The presence of decomposed martesitic laths in prior austenite was noticed in the specimens tempered at 650Â°C and 680Â°C.
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.
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