Effect of composition and inter-critical annealing parameters on microstructure and mechanical properties of DP steel
PRABHAT K RAI D SATISH KUMAR G BALACHANDRAN
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The present study aims at to study the effect of chemical composition, intercritical annealing parameters (temperature and holding time) on microstructure and mechanical properties of dual phase steels. Three normalized steels (A, B and C) with different compositions were subjected to inter-critical annealing at 760°C and 810°C for different holding times (3, 6 and 9 min). The microstructural characterization was carried out using a scanning electron microscope (SEM) and mechanical properties were evaluated using microhardness measurements and tensile tests. The strength has been found to increase from 500 MPa (steel A) to >1200 MPa (steel C) at the cost of a decrease in elongation from 25% (steel A) to 7.5% (steel C). Results havebeen analysed and discussed.
PRABHAT K RAI1 D SATISH KUMAR1 G BALACHANDRAN1
Volume 48, 2023
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