J. Burja, F. Tehovnik, F. Vode, B. Arh, Institute of Metals and Technology, Ljubljana, Slovenia In this chromium slags that form during melting of chromium alloyed steels are examined. During melting and oxidation of these steel grades a considerable amount of chromium is lost, and gained back with slag reduction. Laboratory experiments were performed to study the mechanism of chromium oxide re...

The deformation response and texture evolution of aluminum alloyed Hadfield steel polycrystals is explored in the presence of high-density islocation walls. A recently developed visco-plastic self-consistent model accounting for the contribution of the dense dislocation walls to strain ardening was utilized in predicting the room temperature deformation response under tension and the accompanyi...

This paper describes an improved microwave digestion procedure for steel samples of various kinds intended inductively coupled plasma atomic emission spectrometry, including low alloy steel, stainless alloyed tool and high-speed steel. Their resulting solutions were used the simultaneous quantification elements together with several light boron, aluminum, silicon, phosphorous. Conventional meth...

PURPOSE In this study, we aimed to evaluate the amount of marginal gap with two different substructure materials using identical margin preparations. MATERIALS AND METHODS Twenty stainless steel models with a chamfer were prepared with a CNC device. Marginal gap measurements of the galvano copings on these stainless steel models and Co-Cr copings obtained by a laser-sintering method were made...

Although powder metallurgy is an economical method for production of near net shape components, machining operations are often required to deliver desired geometrical features, dimensional tolerances, and surface finish of PM parts. Machining enhancers are used to improve the machinability of PM components and to increase tool life. MnS is the most common machinability enhancer used for PM stee...

Spark plasma sintering (SPS) is a sintering process that is capable of sintering hard worked powders in short times. This technique was used to fabricate bulk Cu and Cu-SiC nanocomposites. Pure Cu and mixed powders of Cu including 4 vol% of SiC nanoparticles were mechanically alloyed for 25 h and sintered at 750˚C under vacuum condition by SPS method. Microstructures of the materials were chara...