Impact Toughness of High-Strength Low-Alloy Steels Joined by Friction STIR Welding

被引：0

作者：

Dolzhenko, A. S. ^{[1
]}

Lugovskaya, A. S. ^{[1
]}

Malopheyev, S. S. ^{[1
]}

Belyakov, A. N. ^{[1
]}

机构：

[1] Belgorod Natl Res Univ, Belgorod, Russia

来源：

RUSSIAN PHYSICS JOURNAL | 2024年 / 67卷 / 09期

基金：

俄罗斯科学基金会;

关键词：

high-strength low-alloy steel; tempforming; friction stir welding; impact toughness; fractography; DUCTILE-BRITTLE TRANSITION; MECHANICAL-PROPERTIES; MICROSTRUCTURE; TEMPERATURE;

D O I：

10.1007/s11182-024-03254-6

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The microstructure and impact toughness of high-strength low-alloy steels joined by friction stir welding are studied. The hardened steel samples are tempered at a temperature of 600-650 degrees C for 1 hour, followed by warm rolling to a total strain of 1.5 at the same temperature. The resulting steels are characterized by an ultrafine-grained lamella-type microstructure. The as-processed steel plates are joined by friction stir welding. A martensitic microstructure is formed in the stir zone. The steel samples with a carbon content of 0.15% show high impact toughness of 68 J/cm2 at room temperature with a gradual decrease to 16 J/cm2 at a temperature of -196 degrees C, while the steel samples with a carbon content of 0.36% exhibit an impact toughness of 10 J/cm2 at room temperature. The 0.36% carbon steel joints are tempered at a temperature of 650 degrees C for 1 hour, which increases their room-temperature impact toughness to 67 J/cm2.

引用

页码：1356 / 1363

页数：8

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