The frequent replacement of worn rails on tracks brings an immense economic burden the railroad industry, and also causes significant interruptions to operation. Restoration via laser powder deposition (LPD) can considerably reduce associated maintenance costs. This study was focused use LPD repair profile a standard U.S. rail. microstructure 304L stainless steel deposits with minimum hardness ...

Abstract The aim of this work is to generate an advantageous compressive residual stress distribution in the surface area hot-formed components by intelligent process control with tailored cooling. Adapted cooling achieved partial or temporal instationary exposure specimens a water–air spray. In way, macroscopic effects such as local plastification caused inhomogeneous strains due thermal and t...

The effect of cooling rate-induced microstructural changes on corrosion resistance in a CO2-saturated 3.5 wt% NaCl solution have been explored for the API L80–1Cr steel. corroded layer majorly contains siderite, akagenite, and undissolved cementite. amount FeCO3 this is larger water-cooled sample with martensitic structure, whereas furnace-cooled ferritic-pearlitic structure akagenite. retained...

bainitic transformation at low transformation temperatures leads to a microstructure involving fine plates of bainitic ferrite and thin films of retained austenite. this microstructure has shown ultimate tensile strength of about 2.2 gpa, noticeable uniform elongation in the range of 5 to 30%, hardness values of about 600 to 670 hv and impact toughness in the range of 30 to 40 mpa m1/2. with ca...