Rods of Ni-43.5wt% Ti alloy were prepared under various casting conditions. Specimens which were melted in a cordierite crucible and cast in a phosphate-bonded investment mold had less strength and elongation than those melted in a copper crucible and cast in a phosphate-bonded investment mold. All castings exhibited superelasticity at room temperature. The upper limit of recoverable strain was...

The effect of anodic oxidation of a NiTi shape memory alloy in sulfuric acid electrolyte on its surface characteristics was studied. Surface roughness was measured by roughness tester. Surface morphology was studied using optical microscopy (OM) and scanning electron microscopy (SEM). Corrosion behavior was specified by recording Potentiodynamic polarization cur...

Increased risk of ill-health and diseases has been associated with employment in the ferro-alloy factory. Since measurement of transition metals in human blood and hair along with respective exposure rates, provides a means of assessing individual risk, it has been the most important part of the study. In the study majority of the elements in the transition series, such as, vanadium (V), chromi...

Ni-implantation has been conducted for sputter deposited Zr alloy films to investigate compositional dependent amorphization behavior in proportion to Ni in Zr alloys. As-deposited Zr and Zr–Cu with thickness of 200 nm shows columnar hcp-Zr and nano-crystalline hcp-Zr(Cu), respectively. Implantation of 150 keV Niþ with the amount of 1 10 ions/cm induces amorphization of Zr and Zr(Cu) with 100 n...

Introduction: The abundance of Cu in the Earth’s mantle normalized to C1 and Mg is similar to the abundances of Ni and Co [1, 2]. This is surprising as Cu is much less siderophile [2] than Ni and Co. Although a lower bulk Earth abundance of Cu is expected because of its lower condensation temperature, this is not sufficient to compensate for the much lower one bar siderophility of Cu when compa...

In contrast to pure metals and most non-glass forming alloys, metallic glass-formers are moderately strong liquids in terms of fragility. The notion of fragility of an undercooling liquid reflects the sensitivity of the viscosity of the liquid to temperature changes and describes the degree of departure of the liquid kinetics from the Arrhenius equation. In general, the fragility of metallic gl...

Oxygen and nitrogen introduced in three Ni-Cr alloy castings were significantly varied according to both different alloys and different melting methods. The arc melting in Ar blow caused significant increases in the amounts of oxygen and nitrogen uptake, which were influenced by alloy composition. The severe gas absorption by the arc melting in Ar blow resulted in the marked occurrence of poros...

Abstract: The primary aim of the project was to explore the possibility of synthesising high strength multiphase eutectic alloys based on aluminium which also exhibits reasonable ductility. The approach used was to develop a multiscale microstructure including nanometer length scale eutectic colony using ternary alloys and evaluate their deformation behaviour. We have carried out work on two al...

The influence of a c(2x2) ordered interface alloy of 3d transition metals at the ferromagnet/nonmagnet interface on interlayer exchange coupling (IXC), the formation of quantum well states (QWS) and the phenomenon of Giant MagnetoRe-sistance is investigated. We obtained a strong dependence of IXC on interface alloy formation. The GMR ratio is also strongly influenced. We found that Fe, Ni and C...

X-ray diffraction analysis of the alloy system Co-Ni-Cr-Ta showed that the ternary alloy base consisted of three phases (a, ,8, and v-). Addition of Ta caused a decrease in the intensity of the 3 lines. Further Ta additions caused diffraction lines characteristic of the intermetallic compound a-Co3Ta. At higher Ta concentrations, the intensity of the lines characteristic of the aphase increased...