A study on the initiation processes of white etching cracks (WECs) in AISI 52100 bearing steel

被引：23

作者：

Spille, J. ^{[1
]}

Wranik, J. ^{[2
,5
]}

Barteldes, S. ^{[1
,3
]}

Mayer, J. ^{[1
]}

Schwedt, A. ^{[1
]}

Zuercher, M. ^{[2
]}

Lutz, T. ^{[4
]}

Wang, L. ^{[5
]}

Holweger, W. ^{[5
,6
]}

机构：

[1] Rhein Westfal TH Aachen, Cent Facil Electron Microscopy GFE, Ahornstr 55, D-52074 Aachen, Germany

[2] Zeller Gmelin GmbH & Co KG, Schlossstr 20, D-73054 Eislingen Fils, Germany

[3] Qass GmbH, Schollinger Feld 28, D-58300 Wetter, Germany

[4] Univ Tubingen, NMI Nat & Med Sci Inst, Markwiesenstr 55, D-72770 Reutlingen, Germany

[5] Univ Southampton, Fac Engn & Phys Sci, Natl Ctr Adv Tribol Southampton nCATS, Mech Engn Dept,Sch Engn, Southampton SO17 1BJ, Hants, England

[6] Sailegarten 2, D-72351 Erlaheim, Germany

来源：

WEAR | 2021年 / 477卷

关键词：

White etching cracks (WECs); Electron microscopy; AISI; 52100; Subsurface failure; MICROSTRUCTURAL ALTERATIONS; THRUST BEARING; CONTACT; MECHANISM; EVOLUTION; HYDROGEN; MATTER; EBSD;

D O I：

10.1016/j.wear.2021.203864

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The life cycle of any drive train is given by the reliability of its individual components, e.g., bearings, gears, and their connections. Lubrication as a part prevents wear caused by uncontrolled mixed friction. However, lubricants may interfere in the load capacity of the steel due to chemical and physical processes. White etching crack (WEC) failures are one of the most prominent failure mechanisms supposed to be related to this topic. In order to understand its initiation and progression we carried out a series of tests in the FE8 test rig proven to reproduce WECs by lubrication chemistry. These tests were stopped at an early stage. All lubricant compositions leading to WECs showed pores in the subsurface starting in a depth of about 80 mu m as an early state phenomenon, while oils not leading to WECs did not show any changes in a comparable test time. Modifications of the microstructure like new grain boundaries were found next to the pore sites by the use of SEM SE/BSE imaging and EBSD mappings. The present investigations give valuable insight into the formation mechanisms of WECs and on the role of different lubricants in the failure process.

引用

页数：7

共 36 条

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