Effect of epitaxial ferrite on yielding and plastic flow in dual phase steel in tension and compression

摘要: AbstractA low carbon, microalloyed steel was heat treated to obtain dual phase microstructures containing constant levels of 18 and 25 vol.-% martensite at two microstructural refinement with varying epitaxial ferrite content. Tensile compression tests were conducted a strain sensitivity 2 × 10-5. Elastic limits in tension indistinguishable very low, suggesting that mobile dislocations present the as consequence stress relaxation processes. These accommodated volume increase accompanying austenite transformation during treatment. Epitaxial had little effect on 0·2% proof stress, but average stresses generally higher than owing residual following The calculated from this asymmetry small because tempe...