Date post: | 06-Apr-2017 |
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Engineering |
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Effect of Residual Stresses on the Failure of Laser Cladded Rail
Dr Aditya Narayanan, Research Associate
21 September 2016
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Objectives• Measure residual stresses
after laser cladding• Determine the effect of
residual stresses on fracture of rail
• Develop FE model to simulate laser cladding process and predict how parameters influence stress state
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Rail joint
Cladded rail
Above: Section of cladded rail near an insulated rail joint; joint consists of electrical insulator and is used for signalling (ruler shown for scale)
Residual Stresses in Rail Samples
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Left: 0.5 m length of cladded rail (martensitic clad on rail steel) set up for neutron diffraction on translatable stage
Above: Schematic of strain directions obtained using this experimental arrangement
Rail
Stage
Neutron detectors
Incident beam (thick arrow)
εzzεyy
Diffracted beam (thin arrows)
Detector