... Beyerlein. 08 08 2011 26 03 2012 Friction stir processing (FSP) is a relatively new technology for microstructure refinement of metallic alloys. At high processing speeds, excessive heating due to severe plastic deformation and friction may result in local melting at the interface...

... of nanocomposite dispersion and morphology on the dynamic behavior, another nanocomposite was prepared by melt mixing of polypropylene and a modified montmorillonite (dellite) (PP dellite). The dynamic property results for PP-nanocor show an increase of both Young’s modulus and yield stress with the increasing...

... ) + exp ( E ⋅ ε ̇ / ε ̇ 0 ) ] [ 1 − ( T − T ref ) / ( T m − T ref ) ] m , where σ is the flow stress, ε is the strain, ε ̇ is the strain rate, ε ̇ 0 is the reference strain rate, T is the temperature, T ref is the reference temperature, T m is the melting temperature, and A , B , C , D , E , and m...

... spectroscopy, microindentation, and nanomechanical tester. The dendrite structure exists at the fusion zone. The partially melted zone is found near the fusion line. The tensile tests show that the welded alloy exhibits lower strength and ductility than the base alloy, and failure occurs at the partially...

...Stuart Barnes; Michael J. Nash; Y. K. Kwok A 1200 W diode laser was used to modify the surface properties of a fully-sintered ferrous PM material. Two modifications were investigated; transformation hardening of selected areas and sealing of surface porosity by re-melting. The diode laser was used...

... 21, 2000. Associate Technical Editor: S. Datta. 22 February 1999 21 January 2000 stress measurement internal stresses fatigue carbon steel melting heat treatment moire fringes light interferometry Spot welding, or resistance spot welding, involves the joining of two...