Tribology in metal forming at elevated temperatures

Application of Finite Element Simulation in Metal Forming Tribology

The impact of numerical methods, particularly, the Finite Element Method (FEM), in providing tribological information relevant for lubricant formulations and general study of tribological variables is discussed. FEA was used to study surface evolution at the tool-workpiece interface for tube hydroforming and forging processes. The study has demonstrated that material properties, geometric compl...

THE DEFORMATION BEHAVIOR OF AZ31 MAGNESIUM ALLOY AT ELEVATED TEMPERATURES

AZ31 magnesium alloy is considered as a promising alloy in various applications and industries. Furthermore, to design a proper hot working process (rolling, forging and extrusion), the assessment of hot working behaviour of the alloy is necessary. Accordingly, the hot deformation behaviour of AZ31 alloy was studied through hot compression testing method This was carried out in a wide range of ...

Nonharmonic phonons in MgB2 at elevated temperatures

N. D. Markovskiy,1 J. A. Muñoz,1 M. S. Lucas,2 Chen W. Li,1 O. Delaire,2 M. B. Stone,2 D. L. Abernathy,2 and B. Fultz1 1California Institute of Technology, Department of Applied Physics and Materials Science, Pasadena, California 91125, USA 2Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, Tennessee 37831, USA (Received 21 November 2010; revised manuscript received 11 March 2011;...

Surface-enhanced Raman scattering at elevated temperatures.

The effect on surface-enhanced Raman scattering due to the increase in temperature of the metallic substrate is studied via a simple model for physisorbed molecules. Surface roughness is represented by a spherical or spheroidal island, and the temperature effects on the surface plasmon are accounted for via a slightly modified Ujihara model. It is found that the enhancement ratio in general dec...

Ultracentrifugation of Proteins at Elevated Temperatures.