PSI - Issue 13

Valeriy Lepov et al. / Procedia Structural Integrity 13 (2018) 1201–1208 Valeriy Lepov et al/ Structural Integrity Procedia 00 (2018) 000 – 000

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G H Fig. 1. Images of locomotive tire surface near the crack tip (SEM, 15kV) at different magnification: (a) crack overview, ×40; (b) area near crack tip, ×500; (c) strain hardening side of crack, ×1800; (d-f) area near the crack tip, ×1800; (g) face of crack, ×1800; (h) peeling area,×5000.

a) b) Fig. 2. The results of energy dispersion analysis at crack face of locomotive tire probe: (a) chemical element area distribution, ×1500; (b) the diagram of quantitative allocation of chemical elements in the area. Metallographic analysis for welded probes includes optical microscopy after preparation that included polishing and etching St3sp. The microstructure of the following different zones of welded probe shown on Fig. 3: the base metal (left), the weld (center) and the heat affected zone (HAZ) on the right.