Fatigue life behaviour of the dual-phase low carbon steel sheets
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Date
2009-04-01
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Elsevier Science
Abstract
This paper presents the effect of heat treatment on the fatigue life of low carbon steel sheet with dual-phase microstructure. The steel sheets were heat treated with two different procedures; intermediate quenching, intermediate quenching and tempering. The properties of tensile strength, fatigue life, hardness, micro hardness and microstructure were evaluated by the mechanical tests and metallographic analysis, respectively. The results showed that dual-phase steel (DPS) microstructures, composed by ferrite and martensite had higher fully reversed plane bending fatigue strength when compared with as-received steel and tempered martensite (TM) steel. The experimental results showed that fatigue life of the heat-treated steel sheets enhanced with increasing amount of martensite in the microstructure. The highest fatigue strength was observed on the intermediately annealed steel sheets at 870 degrees C. Internal microstructures, fatigue crack initiation and propagation of the heat-treated steel were analyzed by scanning electron microscopy (SEM).
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Keywords
Dual phase steel, Fatigue life, Intermediate heat treatment, Microstructure, Mechanical-properties, Heat-treatment, Martensite, Tensile, Microstructure, Morphology, Engineering, Materials science, Bending strength, Carbon steel, Cracks, Fatigue of materials, Hardness, Heat treating furnaces, Martensite, Metallography, Microstructure, Paper sheeting, Quenching, Scanning electron microscopy, Superconducting wire, Zinc plating, Bending fatigues, Dual phase steel, Dual-phase microstructures, Fatigue crack initiations, Fatigue life, Fatigue strengths, Fully reversed, Intermediate heat treatment, Internal microstructures, Low carbon steel sheets, Mechanical tests, Metallographic analysis, Micro hardness, Quenching and tempering, Sem, Tempered martensites, Steel sheet
Citation
Akay, S. K. vd. (2009). "Fatigue life behaviour of the dual-phase low carbon steel sheets". Journal of Materials Processing Technology, 209(7), 3358-3365.