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Materials Science Weekly Newsletter
Recently Published Articles
- The Influence of Gangue and Additives on the Divalent Iron Content of Magnetite Pellets
Serafín Ferreira, Alejandro Cores, Luis Felipe Verdeja, Iñigo Ruiz-Bustinza, Fernando García-Carcedo and Javier Mochon
Article first published online: 18 DEC 2013 | DOI: 10.1002/srin.201300370
During the pyroconsolidation of magnetite pellets in an aerobic atmosphere, the mineral practically oxidizes in the beginning stages of the process. However, as the temperature increases, the hematite dissociates into magnetite. The temperature at which this phenomenon occurs depends on the additives present and is significantly lower than that corresponding to pure magnetite. In this paper a series of magnetite pellets were formed, varying the alkalinity, and pyroconsolidated at temperatures ranging from 1050 to 1350°C.
- Experimental and Numerical Investigations of the TRIP Effect in 1.4301 Austenitic Stainless Steel Under Static Loading
Satyapriya Gupta, Raphael Twardowski, Pawel Kucharczyk and Sebastian Münstermann
Article first published online: 17 DEC 2013 | DOI: 10.1002/srin.201300223
In the numerical design of TRIP assisted steel components the transformation of austenite to martensite and the accompanying change of plasticity must be considered to ensure a reliable stress analysis. The influence of the TRIP effect on the properties of the 1.4301 austenitic stainless steel is studied experimentally and numerically. The ability of the phase transformation model to quantitatively describe this effect for various loading conditions is evaluated.
- Mathematical and Physical Simulation of a Top Blown Converter
Xiaobin Zhou, Mikael Ersson, Liangcai Zhong, Jingkun Yu and Pär Jönsson
Article first published online: 13 DEC 2013 | DOI: 10.1002/srin.201300310
A simplified model consisting of the converter was used in the mathematical simulation. The comparison between the physical model and the mathematical model shows that the simplified top blown model can successfully be used to calculate long-time simulations, and the mixing time calculations in frozen field can save a large amount of time compared to the simulation time using a transient flow field.
- Comparison of a Fluid and a Solid Approach for the Numerical Simulation of Friction Stir Welding with a Non-Cylindrical Pin
Philippe Bussetta, Narges Dialami, Romain Boman, Michele Chiumenti, Carlos Agelet de Saracibar, Miguel Cervera and Jean-Philippe Ponthot
Article first published online: 13 DEC 2013 | DOI: 10.1002/srin.201300182
The aim of the paper is to present and compare a fluid and a solid approach applied to the numerical simulation of the friction stir welding process with non-cylindrical pins. Both approaches use the Arbitrary Lagrangian–Eulerian formalism in order to avoid mesh distorsions that would inevitably appear while using a more classical approach such as the updated Lagrangian formalism.
- Investigation of Skull Formation in a Blast Furnace Hearth
Yongfu Zhao, Dong Fu, Louis W. Lherbier, Yan Chen, Chenn Q. Zhou and John G. Grindey
Article first published online: 11 DEC 2013 | DOI: 10.1002/srin.201300305
This is the first comprehensive work of using integrated heat transfer, fluid flow dynamics and solidification numerical simulation to investigate skull formation phenomena in a blast furnace hearth. The impact of hearth design and furnace operation parameters on skull formation is examined and compared with operating experience of United States Steel blast furnaces.