Deformation strengthening mechanisms of rails in extremely long-term operation

被引：7

作者：

Ivanov, Yurii ^{[1
]}

Gromov, Victor ^{[2
]}

Yuriev, Anton ^{[3
]}

Kormyshev, Vasiliy ^{[2
]}

Rubannikova, Yulia ^{[2
]}

Semin, Alexander ^{[2
]}

机构：

[1] SB RAS, Inst High Current Elect, 2-3 Akad Skiy Ave, Tomsk 634055, Russia

[2] Siberian State Ind Univ, 42 Kirov Str, Novokuznetsk 654007, Russia

[3] JSC Euraz West Siberian Met Works, 19 Kosmicheskoe Shosse, Novokuznetsk 654043, Russia

来源：

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2021年 / 11卷

关键词：

Strengthening mechanisms; Surface layers; Rail head; Long-term operation; ROLLING-CONTACT FATIGUE; HARDENING MECHANISMS; PRECIPITATION; WEAR; PREDICTION; HARDNESS; TWIN;

D O I：

10.1016/j.jmrt.2020.12.107

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The quantitative estimation of strengthening mechanisms of rails? surface layer is carried out on the basis of regularities and formation mechanisms of structure-phase states revealed by the methods of modern physical materials science. It is performed at different depth of rail head along central axis and fillet of differentially quenched 100-m rails after extremely long-term operation (gross passed tonnage of 1411 mln. tons). The contributions caused by the matrix lattice friction, intraphase boundaries, dislocation substructure, presence of carbide particles, internal stress fields, solid-solution strengthening of pearlite component of steel structure were estimated. It is shown that in the surface layer the main mechanism of strengthening is due to the interaction of moving dislocations with lowangle boundaries of nanometer dimensional fragments and subgrains. In a near-surface layer at a depth of 2-10 mm the main dislocation strengthening mechanism is due to interaction of moving dislocations with immobile ones. (c) 2020 Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND

引用

页码：710 / 718

页数：9