Almost all heavy metals are serious toxicants as carcinogens. However, due to their chemical and physiological properties, heavy metals are useful in industrial areas including alloy, smelting and production of commercial products. Such applications increase the opportunity for heavy metal exposure. Waste from industrial processes is also a major source of environmental contamination and accumu...

A combined experimental numerical approach is applied to determine the transformation induced plasticity (TRIP)-parameter K for different strength low-alloy steels of grade S355J2+N and S960QL as well as the super martensitic filler CN13-4-IG containing 13 wt% chromium and 4 wt% nickel. The thermo-physical analyses were conducted using a Gleeble (®) 3500 facility. The thermal histories of the s...

Though the Carpentier Edwards PERIMOUNT Magna Ease valve is a bioprosthesis with documented excellent haemodynamics and easy implantability, this valve has a gap between the cobalt-chromium-nickel alloy stent and silicone sewing ring. This gap, which is widest just below each of the three commissural struts, lacks silicone and leaves the two-layer polytetrafluoroethylene fabric unsupported and ...

In this work, the structure and mechanical properties of innovative Al-Cu-Fe based alloys were studied. We focused on preparation and characterization of rapidly solidified and hot extruded Al-Cu-Fe, Al-Cu-Fe-Ni and Al-Cu-Fe-Cr alloys. The content of transition metals affects mechanical properties and structure. For this reason, microstructure, phase composition, hardness and thermal stability ...

J. Belan, Faculty of Mechanical Engineering, University of Žilina, Žilina, Slovak Republic INCONEL alloy 718 is a high-strength; corrosion-resistant nickel chromium material used at -253 °C to 705 °C for production of heat resistant parts of aero jet engine mostly. The fatigue test provided on this kind materials were done via low frequency loading up to this time. Nowadays, needs of results at...

Repetitive transcranial magnetic stimulation (rTMS) is a noninvasive neuromodulatory technique whose use in clinical practice has increased steadily since in 2008 the Food and Drug administration (FDA) approved the Neuronetics NeuroStar System for treatment of certain patients with medication-resistant major depression. Although generally well-tolerated, rTMS safety warrants special considerati...

The carcinogenicity of nickel, chromium, arsenic, cobalt, and cadmium compounds has long been recognized. Nevertheless, the mechanisms involved in tumor formation are not well understood. The carcinogenic potential depends on metal species; major determinants are oxidation state and solubility. Two modes of action seem to be predominant: the induction of oxidative DNA damage and the interaction...

This paper discusses the results of a study focused on nature interaction Me-MeN-(Me,Mo,Al)N coatings (where Me = zirconium (Zr), titanium (Ti), or chromium (Cr)) with contact medium based Ni-Cr system. The studies were carried out during turning nickel–chromium alloy at different cutting speeds. hardness was found, and their nanostructure phase composition studied. experiments conducted using ...

AIMS The aims of this study were to investigate the influence of commercially pure titanium (PTi) and titanium-aluminum-vanadium (Ti-6Al-4V) alloys (TiA) on the final shade of low-fusing porcelain bonded to them and to compare the shade changes with those of three conventional metal-ceramic systems. METHODS AND MATERIALS A titanium casting unit was used to cast PTi and Ti-6Al-4V alloy specime...

Nickel is often added to cobalt-based superalloys stabilize their austenitic structure. In this work the effects of Ni on several high temperature properties a chromium-rich alloy reinforced by fraction TaC carbides are investigated. Different thermal analysis techniques used: differential scanning calorimetry (DSC), thermo-mechanical (TMA) and thermogravimetry (TG). Results show that progressi...