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首页> 外文会议>Internation Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures >The Effect of Severe Plastic Deformation by High-Pressure Torsion on Structure and Phase Composition of High-Nitrogen Austenitic Steel
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The Effect of Severe Plastic Deformation by High-Pressure Torsion on Structure and Phase Composition of High-Nitrogen Austenitic Steel

机译：高压扭转严重塑性变形对高氮奥氏体钢的结构和相位组成的影响

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摘要

We study the effect of high-pressure torsion (6 GPa) for 0 (upset), 1/4, 1/2, and 1 revolutions at room temperature on the microstructure and microhardness of high-nitrogen austenitic steel Fe-18Cr-23Mn-2.7V-0.2C-0.7N (wt %). Slip, twinning, formation of localized microbands, and precipitation hardening are the main deformation mechanisms of steel under HPT. The level of solid solution hardening of steel after deformation remains as high as after quenching. As the result of severe plastic deformation, steel microhardness increases by 1.5 times. Mechanical twinning facilitates strain hardening due to high density of high-angle twin boundaries, prevents the formation of misoriented grain/subgrain structure with common type boundaries and contributes to the homogeneity of the structure and microhardness across the specimens.
机译：在室温下，研究高压扭转（6GPA），0（镦染），1 / 4,1 / 2和1转的效果对高氮奥氏体钢Fe-18cr-23mn-的微观结构和显微硬度 - 2.7V-0.2C-0.7N（WT％）。滑动，孪生，局部微生物的形成，以及沉淀硬化是HPT下钢的主要变形机制。变形后钢的固体溶液硬化水平保持高于淬火后的高等。由于严重塑性变形的结果，钢微硬度增加了1.5倍。机械孪晶促进由于高密度高密度的高角度双界密度的应变硬化，防止了具有共同型界限的有吸白的晶粒/粒结构，并有助于在标本上的结构和微硬度的均匀性。

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