Publications by authors named "Panahsadat Fasihi"
Tram or light rail systems are heavily relied upon for passenger transit; however, low-carbon steel grades commonly used in special trackwork, such as in switches, are prone to wear, rolling contact fatigue (RCF), and deformation under cyclic wheel-rail contact. To address this, laser cladding can be used to apply a metal coating to protect the underlying substrate and rebuild the worn rail profiles. Laser cladding may also be applied to remove cracking by rebuilding the rail head.
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- The development of a laser cladding repair strategy, utilizing the new 415SS martensitic stainless-steel alloy, is essential for enhancing heavy-haul railway networks due to its compatibility with premium hypereutectoid rails.
- Non-destructive neutron diffraction techniques were applied to assess the residual stress within various layers of the cladded material, revealing significant internal stress distributions across different heat treatments and grinding operations.
- The research indicates that the optimal combination of 540 °C tempering and minimal surface removal results in beneficial compressive stress in the cladding while minimizing tensile stresses in the heat-affected zone, highlighting the alloy's advantageous properties compared to existing standards.