Mechanical Properties and Wear Behavior of the White Layer

The white layer (WL) generally refers to an untempered martensite layer generated by severe sliding conditions, such as cutting, drilling, grinding, milling, and electron-discharge machining. Numerous tribologists have investigated the effect of the WL on wear behavior, but this phenomenon is not ye...

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Bibliographic Details
Published in:Tribology letters 2012, Vol.45 (1), p.123-129
Main Authors: Cho, Dae-Hyun, Lee, Sung-Ae, Lee, Young-Ze
Format: Article
Language:English
Subjects:
Bearing steels
Chemistry and Materials Science
Chromium steels
Comminution
Corrosion and Coatings
Grinding mills
Martensite
Materials Science
Mechanical properties
Milling (machining)
Modulus of elasticity
Nanoindentation
Nanotechnology
Original Paper
Physical Chemistry
Plastic properties
Substrates
Surface hardness
Surfaces and Interfaces
Theoretical and Applied Mechanics
Thin Films
Tribology
Wear mechanisms
Wear resistance
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Summary:The white layer (WL) generally refers to an untempered martensite layer generated by severe sliding conditions, such as cutting, drilling, grinding, milling, and electron-discharge machining. Numerous tribologists have investigated the effect of the WL on wear behavior, but this phenomenon is not yet clearly understood because no attempt has been made to correlate the wear mechanism of the WL with its wear behavior. It is necessary to investigate the effects of the WL on wear comprehensively. Therefore, elasto-plastic properties, wear resistance, and wear mechanism of WL were studied with nanoindentation and wear tests. The results of this study show that the elastic moduli, yield strength, and hardness of the WL increased by approximately 170, 390, and 180%, respectively. Thus, it was found that the WL had distinct properties with respect to the substrate of AISI 52100 steel. It is possible that the increased surface hardness is an advantage in terms of wear resistance. However, the advantage diminishes, and the WL is subject to wear when delamination dominates the wear mechanism.
ISSN:1023-8883
1573-2711
DOI:10.1007/s11249-011-9869-4