Miren Sarasola, Bachelor of Physics Science and researcher of the Materials Department at CEIT, has developed dense high performance low alloy PM steels by liquid phase sintering. The Thesis title is : "Development of dense high performance low alloy PM steels by liquid phase sintering".
The master alloy concept as a mean for obtaining high density low alloyed PM steels was revisited. In a first instance, several master alloys previously reported in the literature, were reproduced in order to carry out experimental sintering trials with the aim of understanding the behaviour of these master alloys, mixed in predetermined proportions, with a selection of Fe-based powders. As a secondary objective the accuracy of theoretical predictions based on ThermoCalc calculations was compared against the reported experimental data. A conjunction of this information with additional experiments tending to determine the diffusion paths and rates of a diversity of elements in multicomponent Fe-based systems was used for identifying adequate alloy additions supported by a computer aided alloy design approach.
On these bases, several mater alloys have been specifically designed, under metallurgic and thermodinamic criterion, to provide the formation of wetting liquid phases at low temperature and also, attractive mechanical properties of the steels. The as-sintered density and properties of the alloys is determined by the amount and type of master alloy used, total carbon content, the sintering temperature and time. The performance of the master alloys during sintering is shown for several commercially available Fe-based powders. The microstructural development of the steels is determined, both, by the chemical composition of the Fe-based powder and the chemical reactions taking place between the Fe and the master alloy particles during high temperature sintering. The influence of alloying and the sintering conditions on the final microstructure, density and mechanical properties is also discussed.
Irati Kortabitarte | alfa
CCNY-Yale researchers make shape shifting cell breakthrough
12.12.2018 | City College of New York
Electronic evidence of non-Fermi liquid behaviors in an iron-based superconductor
11.12.2018 | Science China Press
A widely used diabetes medication combined with an antihypertensive drug specifically inhibits tumor growth – this was discovered by researchers from the University of Basel’s Biozentrum two years ago. In a follow-up study, recently published in “Cell Reports”, the scientists report that this drug cocktail induces cancer cell death by switching off their energy supply.
The widely used anti-diabetes drug metformin not only reduces blood sugar but also has an anti-cancer effect. However, the metformin dose commonly used in the...
A research team from the University of Zurich has developed a new drone that can retract its propeller arms in flight and make itself small to fit through narrow gaps and holes. This is particularly useful when searching for victims of natural disasters.
Inspecting a damaged building after an earthquake or during a fire is exactly the kind of job that human rescuers would like drones to do for them. A flying...
Over the last decade, there has been much excitement about the discovery, recognised by the Nobel Prize in Physics only two years ago, that there are two types...
What if a sensor sensing a thing could be part of the thing itself? Rice University engineers believe they have a two-dimensional solution to do just that.
Rice engineers led by materials scientists Pulickel Ajayan and Jun Lou have developed a method to make atom-flat sensors that seamlessly integrate with devices...
Scientists at the University of Stuttgart and the Karlsruhe Institute of Technology (KIT) succeed in important further development on the way to quantum Computers.
Quantum computers one day should be able to solve certain computing problems much faster than a classical computer. One of the most promising approaches is...
12.12.2018 | Event News
10.12.2018 | Event News
06.12.2018 | Event News
12.12.2018 | Health and Medicine
12.12.2018 | Physics and Astronomy
12.12.2018 | Health and Medicine