A team of researchers from the University of Rostock in Germany has developed a new way to rapidly produce high strength metallic alloys, at a lower cost using less energy than before. It's expected that this breakthrough will profoundly change how we produce components used in a diverse range of applications; including transport and medical devices.
The research, which appears in the latest issue of the open access journal Materials Today, reports on the first Spark Plasma Sintering (SPS) system with an integrated gas quenching mechanism, capable of alternating the phase compositions and retaining the smallest grain features inside a structured metallic alloy.
SPS is a technique used to fuse fine powders into a dense solid material, by placing powder into a mold (or die) and simultaneously applying pulses of electric current and mechanical pressure to it. By varying SPS cooling rates, it is possible to control the phase and grain sizes in a material, and so, to tune its mechanical properties. In their study, the team of researchers led by Dr. Eberhard Burkel, a Professor of Physics of New Materials, demonstrated that rapidly cooling a material directly after SPS fabrication can produce a material with enhanced hardness, strength and ductility.
The new rapid cooling SPS system is based on a commercially available design, modified to include a series of gas inlet nozzles. After sintering, most SPS systems are left to cool naturally, or are flooded with argon gas. The system blasts nitrogen gas into the chamber at high speeds, rapidly cooling the material.
To demonstrate the utility of the system, Grade 5 Titanium (Ti-6Al-4V) – known as the "workhorse" of the titanium industry – was produced at different cooling rates. The most-rapidly cooled alloy was found to be up to 12% harder than the naturally-cooled alloy, and with an improved ductility up to 34±3%. Ti-6Al-4V is the most common titanium alloy in use worldwide, with applications in the aerospace, biomedical and marine industries.
In their article the researchers explain, "This high-ductile alloy offers unprecedented opportunities for the easy manufacturing of complex shapes for biomedical and new engineering applications."
First author of the study, Dr. Faming Zhang, said "The system will play a major role in the production of novel materials, from metals, alloys, metal matrix composites to micro- and nanostructured semiconductors."
Notes for Editors
This article is "The potential of rapid cooling spark plasma sintering for metallic materials" by Faming Zhang, Michael Reich, Olaf Kessler and Eberhard Burkel. It appears in Materials Today, Volume 16, Issue 5, Page 192-197 (2013) published by Elsevier. Full text of the article is freely available from here. Journalists wishing to interview the authors may contact Dr. Stewart Bland at +44 1865 84 3124 or email@example.com
About Materials Today
Materials Today is the Gateway to Materials Science and home of the Open Access Journal of the same name. The journal publishes peer-refereed review and research articles that assess the latest findings and examine the future challenges, as well as comment and opinion pieces from leading scientists discussing issues at the forefront of materials science. Visit http://www.materialstoday.com for access. Materials Today also publishes news, interviews, educational webinars, jobs and events; and provides free access to a range of specially selected articles from Elsevier's materials science journals. For more information on all aspects of Materials Today, including the editorial calendar and advertising options, contact the editor, Dr. Stewart Bland at firstname.lastname@example.org. Follow @MaterialsToday on Twitter; and on Facebook: http://www.facebook.com/elsevier.materials.
About Open Access Publishing at Elsevier
Elsevier has been providing open access publishing options since 2005. Today, researchers can choose to publish in over 1,500 hybrid journals as well as 39 full open access journals and these numbers will continue to grow rapidly. All of Elsevier's open access publications have been peer reviewed, ensuring that the broader community not only reads the latest research but that it is factual, original and of the highest quality and ethical standards. For more information about Elsevier's open access program, visit http://www.elsevier.com/openaccess
Elsevier is a world-leading publisher of scientific, technical and medical information products and services. The company works in partnership with the global science and health communities to publish more than 2,000 journals, including The Lancet and Cell, and close to 20,000 book titles, including major reference works from Mosby and Saunders. Elsevier's online solutions include SciVerse ScienceDirect, SciVerse Scopus, Reaxys, MD Consult and Nursing Consult, which enhance the productivity of science and health professionals, and the SciVal suite and MEDai's Pinpoint Review, which help research and health care institutions deliver better outcomes more cost-effectively.
A global business headquartered in Amsterdam, Elsevier employs 7,000 people worldwide. The company is part of Reed Elsevier Group PLC, a world-leading publisher and information provider, which is jointly owned by Reed Elsevier PLC and Reed Elsevier NV. The ticker symbols are REN (Euronext Amsterdam), REL (London Stock Exchange), RUK and ENL (New York Stock Exchange).
Stewart Bland | EurekAlert!
One in 5 materials chemistry papers may be wrong, study suggests
15.12.2017 | Georgia Institute of Technology
Scientists channel graphene to understand filtration and ion transport into cells
11.12.2017 | National Institute of Standards and Technology (NIST)
DNA molecules that follow specific instructions could offer more precise molecular control of synthetic chemical systems, a discovery that opens the door for engineers to create molecular machines with new and complex behaviors.
Researchers have created chemical amplifiers and a chemical oscillator using a systematic method that has the potential to embed sophisticated circuit...
MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.
Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...
Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...
Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...
The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
11.12.2017 | Event News
08.12.2017 | Event News
07.12.2017 | Event News
15.12.2017 | Power and Electrical Engineering
15.12.2017 | Materials Sciences
15.12.2017 | Life Sciences