GAS TUNGSTEN ARC WELDING (GTAW) is the quality weld process. It is preferred welding process for stainless steel, low alloy steel, nickel, cobalt, titanium, aluminum, copper, and magnesium. The present work aims to evaluate the effect of Gas Tungsten Arc Welding process parameters on the quality of the weld bead. The process parameters Welding Current, Wire Diameter, Wire Feed Speed, Ratio of w...

In order to study the effects of laser induced metal vapour on arc plasma during laser arc double sided welding (LADSW), emission spectroscopy techniques were utilised. The arc plasma in LADSW of 5A06 aluminium alloy was compared with conventional gas tungsten arc welding (GTAW) in this work. The electron temperature and density were estimated by the Saha– Boltzmann equation and the Stark broad...

This paperpresentsexperimental investigationsandfinite element simulationsonmicro-millingofTi–6Al– 4V alloy with fine grain uncoated and cBN coated micro-end mills. Micro-milling of Ti–6Al–4V using uncoated and cBN coated tungsten carbide micro-end mills are conducted; surface roughness, burr formation and tool wear are measured. Effects of machining parameters on surface roughness, burr format...

A magnesium liquid metal ion source was investigated for p-type doping of GaN. The metal is an alloy composed of 33.3% Mg and 66.7% Ga. The source type is a direct heating needle source with a spring-type reservoir, which is constructed using tungsten wire and a ceramic tube. The source has been tested and characterized in a NanoFab 150 focused ion beam ~FIB! system. A typical source lifetime w...

This review covers the present and future problems in the development and welding of niobium, tantalum, molybdenum and tungsten and their alloys. Their metallurgical characteristics are discussed together with the influence of impurities and alloying elements on mechanical properties, alloy development and weldability. Other factors briefly discussed are availability, high temperature strength,...

Microstructural development and mechanical properties of tungsten heavy alloy, WHA, with FeNiCoCrMn high entropy HEA, binder were investigated compared to conventional WHA using Fe–Ni binder. Both WHAs, HEA binders, fabricated by hot isostatic pressing at a temperature 1450 °C in an argon environment. Scanning electron microscopy revealed that binders possessed uniform well-refined microstructu...

The current work investigates the erosion-corrosion behaviour of thermally sprayed tungsten carbide-10% nickel (WC-10% Ni) coatings placed on AA6061 aluminum alloy. alloy was coated with carbide –10% utilising a high-velocityoxy-fuel (HVOF) spray method. microstructure and hardness were examined using scanning electron microscope (SEM) Vickers tester. slurry wear tests carried out by varying pa...

Abstract In response to the continuous demand for industry progress and need low-cost alternative materials that have superior properties than present ones, a new coupling agent was used treat composites, which were as backing in ultrasonic array transducers. transducers, back-echo reverberation piezoelectric elements occurs, so are critical reducing these echoes. The Cu–Al–Zn-alloy treated wit...