Investigation of failures in a series of diesel locomotive axles. It was found that embrittlement of the axle material (made of unalloyed steel with 0,45-0,59 % C, 0,60-0,90 % Mn, min. 0,15 % Si, max. 0,045 % P, max. 0,050 S) occured by liquid babbitt metal (Pb-alloys with a) 3,5 % Sn, 8,1 % Sb, 0,06 % Zn, 0,17 % Cu and b) 3,1 % Sn, 8,6 % Sb, 0,04 % Zn, 0,29 % Cu) embrittlement following intermittent lubrication breakdown. The embrittlement led to the formation of surface cracks that eventually propagated by fatigue until final failure occurred. The microstructure and fractographic analysis are discussed in some detail, the failure mechanisms observed differing in some aspects from those quoted in the literature in other detailed studies.
Fracture mechanisms in a series of locomotive axle failures
Bruchmechanismen in einer Serie von Versagensfällen von Lokomotivachsen
Materials Characterization ; 26 , 4 ; 235-251
1991
17 Seiten, 23 Bilder, 3 Tabellen, 10 Quellen
Article (Journal)
English
LOKOMOTIVE , EISENBAHNACHSE , DIESELMOTOR , MATERIALBRUCH , VERSPROEDUNG , HYDRODYNAMISCHE SCHMIERUNG , VERSAGEN , LAGERMETALL , BLEILEGIERUNG , UNLEGIERTER STAHL , CHEMISCHE ZUSAMMENSETZUNG , BRUCHMECHANIK , OBERFLAECHENRISS , ERMUEDUNG , MIKROGEFUEGE , FRAKTOGRAPHIE , MAKROGEFUEGE , ACHSE (MASCHINENELEMENT) , DIESELLOKOMOTIVE , RISS , WERKSTOFFGEFUEGE
Locomotive axle failures and wheel-press fits
Engineering Index Backfile | 1935
|Locomotive axle failures and wheel-press fits
Engineering Index Backfile | 1935
|Engineering Index Backfile | 1938
|Engineering Index Backfile | 1938
|Engineering Index Backfile | 1938
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