Effect of Strain Rate on Discontinuous Flow and Mechanical Characteristics of High-Nitrogenous Steel |
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Authors: | Narkevich N. A. Gal'chenko N. K. Andreeva E. I. |
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Affiliation: | (1) Institute of Physics of Strength and Materials Science, Siberian Division of Russian Academy of Sciences, Tomsk, Russia |
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Abstract: | Experimental study on the effect of strain rate on discontinuous flow and mechanical characteristics of the high-nitrogenous steel Kh23AG19F has been performed. Within the range of strain rates from 4.62 · 10-5 to 1.85 · 10 -4 s-1, discontinuous flow, reflected by serration on the tensile diagram, is chiefly determined by intergranular deformation mechanisms. Under strain rates over 1.85 · 10-2 s-1, combined deformation modes prevail, which cause a change in the character of discontinuous flow and transform a serrated tensile diagram into a wavy graph, with the yield stress of steel increased significantly. |
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Keywords: | discontinuous flow strain rate high-nitrogenous steel mechanical characteristics surface relief |
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