Microstructure and Impact Toughness of High-Strength Low-Alloy Steel after Tempforming

被引：9
作者：
Dolzhenko, A. S. [1 ]
Dolzhenko, P. D. [1 ]
Belyakov, A. N. [1 ]
Kaibyshev, R. O. [1 ]
机构：
[1] Belgorod State Univ, Belgorod 308015, Russia
来源：
PHYSICS OF METALS AND METALLOGRAPHY | 2021年 / 122卷 / 10期
基金：
俄罗斯科学基金会;
关键词：
tempforming; lamellar structure; impact toughness; fractography; GRAIN-STRUCTURE;
D O I：
10.1134/S0031918X21100021
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The effects of temperature and degree of tempforming deformation on the microstructure and impact toughness of high-strength low-alloy 25KhGMT steel have been considered. Tempforming forms a lamellar microstructure composed of grains and subgrains that are strongly elongated along the rolling direction. The average size of the grain section is 570-790 nm. Deformation texture includes < 001 > || ND and < 111 > || ND fibers. Tempforming increases the fracture work of this steel at lower test temperatures (KV-40 degrees C >= 360 J) due to the delamination of the specimen perpendicular to the impact direction, which prevents crack propagation towards the direction of the impact.
引用
收藏
页码：1014 / 1022
页数：9
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