The non-isothermal transformation rate curves of metallic glasses are analyzed with the Master Curve method grounded in the Kolmogorov-Johnson-Mehl-Avrami theory. The method is applied to the study of two different metallic glasses determining the activation energy of the transformation and the experimental kinetic function that is analyzed using Avrami kinetics. The analysis of the crystalliza...

PURPOSE The purpose of this study was to investigate the marginal precision of computer numeric control-milled frameworks fabricated of grade 4 commercially pure titanium or cobalt-chrome alloy through digital technology and to compare them with conventional cast frameworks. MATERIAL AND METHODS A titanium cast of a mandibular arch with six implant analogs was used as a master. The master cas...

Abstract Fe–26Si–9B alloy is a promising high temperature phase change material (HTPCM), due to its heat of fusion, small volumetric change, abundance, and low cost. Additionally, graphite has been identified as candidate for use container this alloy. In study, the feasibility using HTPCM investigated in pilot-scale. Specifically, 4–5 kg master alloys were melted crucibles an induction furnace,...

To improve the modelling performance, one should either propose new modelling methodologies or make the best of existing models. In this paper, the study is concentrated on the latter solution, where a structure-free modelling paradigm is proposed to combine various modelling techniques in ‘symbiosis’ using a ‘master fuzzy system’. This approach is shown to be able to include the advantages of ...

Fe-based metallic glasses such as FINEMET, NANOPERM and HITPERM usually produced from amorphous precursors in various forms have been intensively studied over the past thirty years, because these materials exhibit a unique combination of soft magnetic properties [1], which is very interesting from a scientifi c point of view. The application of these materials at elevated temperatures is determ...

Aluminum 2024 and 7075 alloys which are widely used in aerospace and marine applications were chosen to investigate their strengthening mechanisms. Using differential thermal analysis (DIA), metallography and tension tests, the best solutionizing conditions were determined to be 500±5°C and 2 hours for 2024 and 480?±5°C and 1 hour for 7075 alloy. Aging was performed in the range of 100 to 200°C...

The grain refinement behavior of Si-3P, Si-25Mn-10P, and Al-10Si-2Fe-3P master alloys on hypereutectic Al-24Si alloy was studied. Microstructure analysis indicates that the P-containing compounds in three are SiP, MnP, AlP, respectively. coarse flower-like primary silicon transforms into smaller, well-distributed blocks with addition various alloys. When pouring at 840 °C, average size refined ...

Zr is an important element to improve the heat resistance of aluminum alloys, which usually added alloys using Al-Zr master alloys. The microstructure has a significant impact on properties Zr-bearing In this paper, commercial Al-5Zr was examined, and effect remelting temperature cooling rate solidification structure remelted investigated, aiming develop feasible way for quality improvement res...