Journal
INTERNATIONAL JOURNAL OF FATIGUE
Volume 44, Issue -, Pages 273-278Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2012.04.010
Keywords
Steel; Rolling contact fatigue; Rail-wheel tribology; Optical microscopy
Funding
- National Science Foundation for Distinguished Young Scholars of China [50925522]
- National Natural Science Foundation of China [50671091, 50871094, 51121061]
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The formation of the fatigue cracks was due to massive vacancy clusters in the subsurface layer of Hadfield steel crossing, which are induced by the accumulated plastic deformation under the conditions of impact and contact stresses from train wheels. The high concentration layers of vacancy clusters were formed parallel to the working surface of the crossing, which caused the initial rolling contact fatigue cracks to be parallel to the working surface with a laminar distribution in the depth direction. It can be predicted that metals containing elements with larger atomic diameter should have better rolling contact fatigue and wear performances. (C) 2012 Elsevier Ltd. All rights reserved.
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