INFLUENCE OF MARTENSITE CONTENT ON TENSILE PROPERTIES OF DUAL-PHASE STEEL

Ayad A. Abdulwahed; Krzysztof Rozniatowski; Krzysztof J. Kurzydlowski

doi:10.66411/jer.v11i.185

Authors

Ayad A. Abdulwahed Department of Materials and Metallurgical Engineering, Al-Fateh University, P. O. Box 13430, Tripoli, Libya Author
Krzysztof Rozniatowski Department of Materials Science, Warsaw University of Technology, ul. Woloska141, 02-507 Warsaw, Poland Author
Krzysztof J. Kurzydlowski Department of Materials Science, Warsaw University of Technology, ul. Woloska141, 02-507 Warsaw, Poland Author

DOI:

https://doi.org/10.66411/jer.v11i.185

Keywords:

Tensile fracture, Mechanical properties, Dual phase microstructure, Martensite, Ferrite, Heat treatment

Abstract

A series of samples of a dual-phase steel containing finely dispersed martensite with different volume fractions (V_m), varying from 22 to 47%, were produced by intercritical annealing of 0.11C-0.12Si-1.2Mn steel. the mean intercept length for ferrite increases, whereas the mean intercept length for martensite decreases, with increasing volume fraction of martensite. The deformation characteristics of the samples have been obtained at a constant strain rate 8x10^-4 s^-1 at room temperature. Both the yield and tensile strengths were observed to increase with the volume fraction of the martensite. Jaoul-Crussard analysis of the work-hardening behavior of the samples showed two distinct stages of plastic deformation

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