Fracture Toughness of Aging Nonmagnetic Vanadium-Containing Steels

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发表日期：

2024年6月1日

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V. M. Blinov,
O. A. Bannykh,
I. O. Bannykh,
E. V. Blinov,
E. I. Lukin,
D. V. Chernenok,
I. N. Lukina,
M. A. Samoilova

摘要

Abstract—The influence of alloying elements and heat-treatment conditions on the fracture toughness of precipitation-hardening nonmagnetic vanadium-containing steels has been studied. The causes of formation of microductile intergranular fracture in steels, the structure of which contains precipitate-free zones, are revealed. Alloying of Mn-containing steels with nickel is found to increase K_1c; the introduction of chromium in Mn–Ni steels in an amount of more than 3% leads to a decrease in K_1c. The heat-treatment conditions forming a fine-grained structure with fine VC and VN particles in an amount of 0.5–1.0 wt % is shown to provide maximum K_1c.