A 3D multi-scratch test model for characterizing material removal regimes in 5083-Al alloy

A scratch intersection model of material removal during Chemical Mechanical Planarization (CMP)

Laser Welding of Aluminium Alloy 5083

There are two laser welding mechanisms, keyhole mode and conduction mode. Keyhole welding is widely used because it produces welds with high aspect ratios and narrow heat affected zones. However keyhole welding can be unstable, as the keyhole oscillates and closes intermittently. This intermittent closure causes porosity due to gas entrapment. Conduction welding, on the other hand, is more stab...

Investigation of the material removal characteristic for polishing CoCr alloy

To investigate the material removal characteristic of paste polishing, experimental investigations based on Taguchi method have been carried out. In the experiments, the dwell time was fixed 300 seconds and the bonnet position was 4. The four variable factors (precess angles, head speed, head pressure and tool offset) with 3 levels were chosen to design the orthogonal array. With the designed o...

A statistical model for material removal prediction in polishing

This paper develops analytically a statistical model for predicting the material removal in mechanical polishing of material surfaces (MS). The model was based on the statistical theory and the abrasive–MS contact mechanisms. The pad-MS and pad-abrasive-MS interactions in polishing were characterised by contact mechanics. Two types of active abrasive particles in the polishing system were consi...

A Genetic Algorithm for Scratch Removal in Static Images

This paper investigates the removal of line scratches from old niovies and gives a twofold contribution. First, it presents simple technique for detecting the scratches, based on an analysis of the statistics of the grey levels. Second, the scratches removal is approached as an optiniisation problem, which is solved by using a genetic algorithm. The method can be classified as a static approach...