October 2010

Hot deformation behavior of Nb-V microalloyed steel

      n this research, hot deformation behavior of Nb-V microalloyed steel has been investigated by conducting hot compression tests at temperatures of 900-1100°C and under constant strain rates, ranging from 0.01 to 1s-1. The stress-strain curves showed that dynamic recrystallization is responsible for flow softening at steady temperatures and strain rates. The relations between peak...

Author(s):   G. R. Ebrahimi, H. Arabshahi and M. Javdani      

October 2010

Investigation to improve hunting stability of railway carriage using semi-active longitudinal primary stiffness suspension

  Railway carriage model moving on tangent tracks is constructed by deriving the associated equations of motion where single-point and two-point wheel-rail contact is considered. The railway carriage is modeled by 31 degrees of freedom which govern vertical displacement, lateral displacement, roll angle and yaw angle of wheelset whereas vertical displacement, lateral displacement, roll angle, pitch angle and...

Author(s):   Karim H. Ali Abood and Rasheed Ahmad Khan