Le groupe PSA (Peugeot, Citroën et Opel dernièrement), Renault et Fiat. Voilà les tout premiers clients de la ligne JVD (Jet vapor deposition) d’ArcelorMittal, située à Kessales (Jemeppe). Les premières bobines de cet acier du futur viennent d’être commandées. Cette technologie, unique au monde, a été développée ici à Liège, au Centre de recherche métallurgique. Les premiers clients du secteur automobile viennent de passer leurs premières commandesContinue reading
Les actionnaires majoritaires de ce spécialiste français de l’usinage ont déjà reçu huit offres spontanées.
Mecachrome, l’un des plus anciens équipementiers de l’aéronautique française, est à vendre. Dix ans après avoir repris l’entreprise en redressement judiciaire, les trois actionnaires majoritaires – le fonds d’investissement ACE (35 %), bpifrance (30 %) et le fonds de solidarité des travailleurs du Québec (35 %) – ont décidé de se désengager de concert, indique un proche du dossier, confirmant des informations du Figaro. « Un mandat de vente a été confié à Rothschild […] L’objectif est de conclure la transaction au cours du premier semestre 2018 », écrit le quotidien, qui avance le chiffre de 500 millions d’euros, « soit dix fois son résultat opérationnel ».Continue reading
In October 27th, Nanshan aluminum forging company with the British Rolls Royce company (Rolls-Royce) engine rotating parts supply contract signing ceremony was held in the Nanshan aviation technology center park. Rolls Royce Asia Pacific Supplier Management Executive James Lloyd, Rolls Royce Chinese supplier management executive official Hong Xiang, Lolo Chinese District rotary parts supplier management business manager Wu Tan, Cheng Rence, chairman of Nanshan, Nanshan aluminum board, deputy general manager and general manager LuContinue reading
Elsa Olivetti, the Atlantic Richfield Assistant Professor of Energy Studies in MIT’s Department of Materials Science and Engineering (DMSE).
System could pore through millions of research papers to extract “recipes” for producing materials.
In recent years, research efforts such as the Materials Genome Initiative and the Materials Project have produced a wealth of computational tools for designing new materials useful for a range of applications, from energy and electronics to aeronautics and civil engineering. But developing processes for producing those materials has continued to depend on a combination of experience, intuition, and manual literature reviews. A team of researchers Continue reading
Austrian specialty steel firm Boehler wants to buy cobalt in a year-long contract rather than buying monthly, two industry sources said on Friday, as rising demand from electric car makers has complicated its normal purchase patterns. Demand for cobalt, a key component of rechargeable batteries, is expected to soar in coming years as governments battle pollution and more electric cars are built. German carmaker Volkswagen asked producers last month to submit proposals for supplies for up to 10 years from 2019. Boehler, aunit of Vienna-listed Continue reading
LLNL materials scientist Joe McKeown looks on as postdoc researcher Thomas Voisin examines a sample of 3D printed stainless steel.; Researchers say the ability to 3D print marine grade, low-carbon stainless steel (316L) could have widespread implications for industries such as aerospace, automotive, and oil and gas.
“Marine grade” stainless steel is valued for its performance under corrosive environments and for its high ductility—the ability to bend without breaking under stress—making it a preferred choice for oil pipelines, welding, kitchen utensils, chemical equipment, medical implants, engine parts and nuclear waste storage. However, conventional techniques for strengthening this class of stainless steels typically comes at the expense of ductility. Lawrence Livermore National Laboratory (LLNL) researchers, along with collaborators at Ames National Laboratory, Georgia Tech University and Oregon State University, have achieved a breakthrough in 3-D printing one of the most common forms of marine grade stainless steel—a low-carbon type called 316L—that promises an unparalleled combination of high-strength and high-ductility properties for the ubiquitous alloy. The research appears online Oct. 30 in the journal Nature Materials .
“In order to make all the components you’re trying to print useful, you need to have this material property at least the same as those made by traditional metallurgy,” said LLNL materials scientist and lead author Morris Wang. “We were able to 3-D print real components in the lab with 316L stainless steel, and the material’s performance was actually better than those made with the traditional approach. That’s really a big jump. It makes additive manufacturing very attractive and fills a major gap.”
Wang said the methodology could open the floodgates to widespread 3-D printing of such stainless steel components, particularly in the aerospace, automotive and oil and gas industries, where strong and tough materials are needed to tolerate extreme force in harsh environments.
To successfully meet, and exceed, the necessary performance requirements for 316L stainless steel, researchers first had to overcome a major bottleneck limiting the potential for 3-D printing high-quality metals, the porosity caused during the laser melting (or fusion) of metal powders that can cause parts to degrade and fracture easily. Researchers addressed this through a density optimization process involving experiments and computer modeling, and by manipulating the materials’ underlying microstructure.
“This microstructure we developed breaks the traditional strength-ductility tradeoff barrier,” Wang said. “For steel, you want to make it stronger, but you lose ductility essentially; you can’t have both. But with 3-D printing, we’re able to move this boundary beyond the current tradeoff.”
Using two different laser powder bed fusion machines, researchers printed thin plates of stainless steel 316L for mechanical testing. The laser melting technique inherently resulted in hierarchical cell-like structures that could be tuned to alter the mechanical properties, researchers said.
“The key was doing all the characterization and looking at the properties we were getting,” said LLNL scientist Alex Hamza, who oversaw production of some additively manufactured components. “When you additively manufacture 316L it creates an interesting grain structure, sort of like a stained-glass window. The grains are not very small, but the cellular structures and other defects
LLNL postdoc researcher Thomas Voisin, a key contributor to the paper, has performed extensive characterizations of 3-D printed metals since joining the Lab in 2016. He believes the research could provide new insights on the structure-property relationship of additively manufactured materials.
“Deformation of metals is mainly controlled by how nanoscale defects move and interact in the microstructure,” Voisin said. “Interestingly, we found that this cellular structure acts such as a filter, allowing some defects to move freely and thus provide the necessary ductility while blocking some others to provide the strength. Observing these mechanisms and understanding their complexity now allows us to think of new ways to control the mechanical properties of these 3-D printed materials.”
Wang said the project benefitted from years of simulation, modeling and experimentation performed at the Lab in 3-D printing of metals to understand the link between microstructure and mechanical properties. He called stainless steel a “surrogate material” system that could be used for other types of metals.
The eventual goal, he said, is to use high-performance computing to validate and predict future performance of stainless steel, using models to control the underlying microstructure and discover how to make high-performance steels, including the corrosion-resistance. Researchers will then look at employing a similar strategy with other lighter weight alloys that are more brittle and prone to cracking.
The work took several years and required the contributions of the Ames Lab, which did X-ray diffraction to understand material performance; Georgia Tech, which performed modeling to understand how the material could have high strength and high ductility, and Oregon State, which performed characterization and composition analysis.
Innovations such as 3D printing, robotics, extreme customisation and high-performance computing are just some of the elements that will shape the future of manufacturing. But nothing will impact how things are made, and what they are capable of, more than the materials manufacturers use.
Advancements in material science are at a turning point. From programmable matter to smart polymers Continue reading
Cherepovets Steel Mill, one of the world’s largest integrated steel plants (part of Severstal’s Russian Steel division), has launched the commercial operation of a digital predictive model to prevent failures at the hot rolling mill 2000 and thereby reduce its downtime. This model calculates the probability and risk of the pinion stand bearings overheating, which is one of the most frequent and costly causes of unit shutdown. This is the first predictive Continue reading
CHICAGO, Nov. 1, 2017 /PRNewswire/ — Boeing [NYSE: BA] announced its investment in Valencia, Calif.-based Gamma Alloys, a leader in aluminum alloys focused on developing advanced metal-matrix composites for use in aerospace, automotive and other industries. This investment by Boeing HorizonX Ventures, which was established earlier this year, is its first in advanced materials and machining development and applications. “The wear, strength, durability and machining characteristics of Gamma’s materials have the opportunity to further reduce the weight ofContinue reading
Greg Mulholland is the Chief Executive Officer and Co-Founder of Citrine Informatics, the data analytics platform for materials and chemicals. He works with partners along the materials value chain to use state of the art data science techniques to identify areas of improvement and optimization in advanced materials discovery, product design, and manufacturing. He has co-authored 20 peer-reviewed publications in materials science andContinue reading