View
30
Download
3
Category
Preview:
Citation preview
Effect of Residual Stresses on the Failure of Laser Cladded Rail
Dr Aditya Narayanan, Research Associate
21 September 2016
1
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
2
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
3
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
Recommended