Strain-induced transformation of retained austenite in low-carbon low-silicon TRIP steel containing aluminum and vanadium
Effects of intercritical annealing temperature on the microstructure and mechanical properties in low-carbon low-silicon TRIP (transformation-induced plasticity) steel containing aluminum and vanadium were investigated. The highest volume fraction of retained austenite of samples annealed at 1053 K was approximately 18%, while the product of strength and elongation of samples annealed at 1033 K was up to 22,000 MPa%. In addition, the retained austenite transformation kinetics were measured by tensile test and fitted by the function y = 1 − e−Ax. The correlation between the experimental and fitting results was good. A in the function might be a more effective factor to measure the mechanical properties of TRIP steel than the volume fraction of retained austenite.
vanadium TRIP steel; Retained austenite; Transformation kinetics; Intercritical annealing temperature; Mechanical properties.
W. Shi (1), L. Li (1), C. Yang (1), R. Fu (1), L. Wang (2) and P. Wollants (3)
(1) Department of Material Science and Engineering, Shanghai University, Shanghai 200072, China
(2) Technology Center, Baoshan Iron & Steel Co. Ltd., Shanghai 201900, China
(3) Department MTM, KU Leuven, Heverlee B-3001, Belgium
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Materials Science and Engineering: A Vol. 429, No. 1-2, 2006, pp.247-251 (Vanitec Publication - V0707)