Research Article

A Kinetic Model for Tribological Surface Transformations Occuring on the Railroads: Irreversible Near-Surface Metallurgical Transformations

Figure 1

(a) Macroscopic view on the tread of a rail (S54/900A steel) showing TSTs or “White Etching Layer”. (b) Transverse cross-section of the upper part of a rail (a). The parent phase (grey part) is ferrite pearlite, which still remains in the rail when TSTs have developped and the daughter phase (white part), occurring at the surface, is “quasi-martensite” (extract from [8]).
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(a)
590792.fig.001b
(b)