The in ̄uence of chloride ion concentration and pH on the corrosion and electrochemical behaviour of die-cast and ingot-cast AZ91D alloy have been studied with a focus on the stability of microconstituents in these environments. The experimental techniques used include immersion studies, potentiodynamic polarization, X-ray di€raction and optical and scanning electron microscopy. The corrosion ra...

We present high-resolution images of the lateral distribution of interstitial iron across wafers from various positions along the length of a directionally solidifiedmulticrystalline silicon ingot. Iron images were taken on wafers in the as-cut state and also after two different phosphorus gettering steps performed at 8458C for 30min, one with an additional anneal at 6008C for 5 h (referred to ...

An induction cold crucible melting is one of the most promising technologies for the reuse and decontamination of the radioactively contaminated metallic materials generated during the dismantling of nuclear facilities, because the crucible ensures a long life operation without generating secondary wastes. Fundamental equipment of the Melting and Recycling of Metals by Cold Crucible (MERC) proc...

This paper considers the identical parallel machine scheduling problem to minimize the makespan with controllable processing times, in which the processing times are linear decreasing functions of the consumed resource. The total resource consumption is limited. This problem is NP-hard even if the total resource consumption equals to zero. Two kinds of machines, critical machine and non-critica...

Phosphoric iron of two different phosphorus content, namely P1 (Fe-0.30P-0.226C), P2 (Fe0.11P-.028C) were first prepared by ingot casting route. The ingot were soaked and forged at 1150C. The microstructures of the phosphoric iron and its relevant mechanical properties such as hardness and tensile properties have been characterized. J-R curves of the material have been determined at room temper...

A multi-year effort has been focused on optimizing the long-term oxidation performance of ingot-processed (IP) and oxide-dispersion strengthened (ODS) Fe3Al and iron aluminidebased coatings. Based on results from several composition iterations, a Hf-doped alloy (Fe28Al-2Cr-0.05at.%Hf) has been developed with significantly better high temperature oxidation resistance than other iron aluminides. ...

Abstract A comprehensive numerical model is proposed to study the influence of an axial magnetic field (AMF) on solidification behavior a Titanium-based (Ti–6Al–4V) vacuum arc remelting (VAR) ingot. Both static and time-varying AMF are examined. The 2D axisymmetric swirl includes calculating electromagnetic thermal fields in entire system composed electrode, plasma, ingot, mold. combination vec...