...Farhang Farrokhi; Benny Endelt; Rasmus S. Andersen; Morten Kristiansen Grain refinement and the avoidance of columnar solidification is a great challenge in the deep penetration laser welds of thick-section steels. Further knowledge about the heat distribution and the temperature gradients in laser...

... precipitation (physical chemistry) punching shrinkage solidification Aluminum, being a light weight material, has wide applications in automobile and aerospace industries. The formability of aluminum alloys can be significantly increased using high-energy rate forming methods [( 1...

... accuracy. 28 10 2009 17 09 2011 11 01 2012 11 01 2012 bubbles computational fluid dynamics electrical discharge machining enthalpy Gaussian distribution heat transfer plasma heating solidification In electrical discharge machining (EDM), the material removal...

... under the optical microscope. 27 05 2010 07 10 2011 11 01 2012 11 01 2012 adhesion austenitic stainless steel cooling diffusion bonding hardness heating indentation scanning electron microscopy solidification tensile strength titanium alloys zirconium alloys...

.... However, some craters would still exist on the machined surface, which limits the further improvement of the surface quality of the machined workpieces. One possible solution is to apply external forces to workpieces by using high-frequency vibrations to smooth craters during melting and solidification...

... utilizes effectively coupled thermal-dynamic effects of HIPIB irradiation onto materials, characterized by ultrafast surface remelting and solidification, and controlled ablation. As a result, using the IBSP treatment with HIPIB parameters with an ion energy of 200–400 keV and an ion current density of 50...

... , 283 , pp. 271 – 285 . Wood , R. F. , and Geist , G. A. , 1986 , “ Modeling of Nonequilibrium Melting and Solidification in Laser-Irradiated Materials ,” Phys. Rev. B 0163-1829 10.1103/PhysRevB.34.2606 , 34 , pp. 2606 – 2620 . Xu , X. , Grigoropoulos , C. P...

... , A. A. , 1994 , “ Precise Deposition of Molten Microdrops: The Physics of Digital Microfabrication ,” Proc. R. Soc. London, Ser. A 1364-5021 10.1098/rspa.1994.0037 , 444 , pp. 533 – 554 . Fang , M. , Chandra , S. , and Park , C. B. , 2007 , “ Experiments on Remelting and Solidification...

... underneath, laser scanning velocity, and initial porosity on the sintering process are investigated. 05 06 2006 28 04 2008 08 07 2008 finite volume methods laser sintering natural convection porosity powders solidification Selective laser sintering (SLS) is a rapid...

... the solidification time of a newly deposited water layer and to develop a better understanding of heat transfer during the RFP process. ANSYS Parametric Development Language (APDL) is utilized to develop software for the prediction of solidification time. The result is used to investigate the effect of various...

... coefficient, ( W ∕ m 2 K ) h s ℓ latent heat of melting or solidification, J/kg i unit vector in the x direction I 0 laser intensity at the center of the laser beam ( W ∕ m 2 ) j unit vector in the y direction...

.... The results indicated complex interaction among the process parameters and the material flow, which affected the final pin formation. The punch temperature and velocity had a significant effect on the overall die filling. The initial workpiece shape and solidification of the semi-solid material during forming...

... bonding between droplets and uniform diameter. 01 01 2006 20 09 2006 liquid metals drops solidification heat transfer rapid prototyping (industrial) liquid phase deposition production engineering computing droplet-based manufacturing droplet deposition remelting...

... components of aluminum-based MMNCs through solidification processing. However, it is extremely difficult to disperse nanosized ceramic particles uniformly in molten aluminum. In this paper, a high power ultrasonic probe is used to disperse nanosized SiC particles into molten aluminum alloy A356. Experimental...

... components of aluminum based MMNCs through solidification processing. However, it is extremely difficult to disperse nanosized ceramic particles uniformly in molten aluminum. In this paper, a high power ultrasonic probe is used to disperse nanosized SiC particles into molten aluminum alloy A356. Experimental...

... h convective heat transfer coefficient, W ∕ m 2 K h m latent heat of melting or solidification, J ∕ kg i unit vector in x direction I 0 laser intensity at the center of the laser beam, W ∕ m 2 j unit...

... conditions. These measurements are complemented by qualitative data of casting defects caused by incomplete solidification and thermal imaging temperature measurements. An experimental technique for obtaining average heat transfer coefficients for the casting–die interface is presented. Although...