Efosa Osamudiamen, Obidimma D. Ikeh, Monye I. Stella & Okafor A. Chibuzor


The effect of various prestrain levels on the microstructure of heat treated 0.14%C steel was analyzed. Low carbon steel was heat treated by first austenitising at 910°C and then quenched in water. The heat treatment process was completed by reheating in the furnace and holding at 700°C. The specimens were then subjected to prestrain levels of 7%, 9%, 13%, and 20% in tension. Microstructural analysis was carried out on specimens for the various prestrain values including the unstrained. The results displayed that the microstructures of the different specimens showed consistent changes with the increasing prestrain values. Thus, the higher the prestrain value the finer the precipitate particles. Read full PDF

Keywords: Prestrain, Microstructure, Heat treatment, Precipitate particles, Ferrite matrix


[1] Onyekpe B., (2002). The Essentials of Metallurgy and Materials in Engineering. Ambik Press, Benin City.

[2] Kei S, Saiji M and Kazuhiro S. (2003). “Highly Formable Sheet Steels for Automobile through Advanced Microstructure Control Technology”, Kawasaki Steel Technical Report No. 48 Pp. 3-8

[3] Smallman R. E., Bishop R. J (1999). Modern Physical Metallurgy and Materials Engineering (Science, process, applications). Reed Educational and Professional Publishing Ltd.

[4] Zhang L C, Timokhina I B, La Fontaine A, Ringer S P, Hodgson P D and Pereloma E V, (2009). “Effect of Pre-Straining and Bake Hardening on the Microstructure and Mechanical Properties of Cmnsi Trip Steels”, La metallurgiaitaliana Pp.50-55.

[5] Bahadir K. (2003). Product Properties Prediction after Forming Process Sequence. The Middle East Technical University.

[6] Hyland C W K, Ferguson W G, Butterworth J W, “The Effect of Pre-Strain and Aging on the Fracture Toughness of Australasian Constructional Mild Steel” (2004). SIF2004 Structural Integrity and Fracture. University of Auckland, New Zealand.

[7] Maj M and Oliferuk W (2015). “Pre-strain direction effect on microstructure evolution and energy storage process during uniaxial tension of austenitic steel”, Journal of Physics: Conference Series 240.

[8] Susilo L.P, Refai M. and Nurul M. (2014). “Effect of Pre-Strain on the Longitudinal Residual Strain of Dissimilar Metal Welded Between Stainless Steel and Carbon Steel”, 7th International Conference on Physics and Its Applications.

[9] Kakani S L and Kakani A, (2004). Material Science. New Age International. New Delhi