Defect substructure change in 100-m differentially hardened rails in long-term operation

被引：8
|
作者：
Gromov, V. E. [1 ]
Yuriev, A. A. [2 ]
Ivanov, Yu. F. [3 ,4 ]
Glezer, A. M. [5 ]
Konovalov, S. V. [6 ]
Semin, A. P. [1 ]
Sundeev, R. V. [5 ,7 ]
机构：
[1] Siberian State Ind Univ, Kirov Str 42, Novokuznetsk 654007, Russia
[2] LTD Co EVRAZ Integrated West Siberian Met Combine, Kosmicheskoe Av 16, Novokuznetsk 654043, Russia
[3] SD RAS, Inst High Current Elect, Akad Av 2/3, Tomsk 634055, Russia
[4] Natl Res Tomsk Polytech Univ, Lenin Av 30, Tomsk 634050, Russia
[5] Natl Univ Sci & Technol MISIS, Leninskii Av 4, Moscow 119049, Russia
[6] SP Korolev Samara Natl Res Univ, Moskovskoe Sh Str 34, Samara 443086, Russia
[7] Moscow Technol Univ MIREA, Vernadskogo Av 78, Moscow 119454, Russia
来源：
MATERIALS LETTERS | 2017年 / 209卷
基金：
俄罗斯科学基金会;
关键词：
Differentially hardened rails; Substructure; Dislocation density; Long-term operation; PEARLITIC STEEL; CEMENTITE; DECOMPOSITION; GRADIENTS;
D O I：
10.1016/j.matlet.2017.07.135
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
By methods of optical and transmission electron diffraction microscopy the evolution in structural phase states of surface layers head of differentially hardened rails of DT 350 category to the depth up to 10 mm along the central axis after the passed tonnage of 691.8 mln. t brutto was studied. The formation of gradient substructure being expressed in regular change in scalar and excess density of dislocations, curvature-torsion amplitude of steel crystal lattice, degree of deformation transformation of lamellar pearlite structure was defected. The failure mechanisms of cementite plates were considered. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：224 / 227
页数：4
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