Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > New spin on friction-stir: Friction-stir extrusion seen as key to new materials process at a fraction of the energy

ORNL researchers (from left) Zhili Feng, Stan David and Alan Frederic display a length of wire more than 15 feet long fabricated with the friction-stir extrusion method. They eventually ran out of the magnesium-aluminum alloy feed stock. Friction-stir extrusion is an energy-efficient method for making wire from high-temperature, recyclable materials.
ORNL researchers (from left) Zhili Feng, Stan David and Alan Frederic display a length of wire more than 15 feet long fabricated with the friction-stir extrusion method. They eventually ran out of the magnesium-aluminum alloy feed stock. Friction-stir extrusion is an energy-efficient method for making wire from high-temperature, recyclable materials.

Abstract:
Researchers Zhili Feng, Alan Frederic and Stan David in Oak Ridge National Laboratory's Materials S&T Division have made significant progress toward a new metal processing technique, called friction-stir extrusion, that could represent a major advance in converting recyclable materials -- such as alloys of aluminum, magnesium and titanium alloys, and even high-temperature superconductors -- to useful products.

New spin on friction-stir: Friction-stir extrusion seen as key to new materials process at a fraction of the energy

Oak Ridge, TN | Posted on July 26th, 2011

The process also represents a step forward in energy-efficient industrial processes in that it eliminates the melting step in conventional metal recycling and processing. The friction-stir method, as the name implies, derives its heat from spinning metal against metal, and direct conversion of mechanical energy to thermal energy as frictional heat generated between two surfaces.

The ORNL team produced a solid wire of a magnesium-aluminum alloy from machined chips, eliminating the energy and labor intensive processes of melting and casting.

"This process is very simple. You get the product form that you want by just using the frictional heat," said Stan David, an ORNL retiree and consultant who once led the division's Materials Joining group.

The new approach provides an opportunity to efficiently produce highly engineered structural and functional materials. Friction extrusion can be developed into metal recycling process of steels, Al alloys, and other recyclable metals. It is suitable to produce a variety of bulk nano materials such as nano engineered ODS alloys. It also has the potential to produce nano grain structure bulk materials. The impact of economically producing nano engineered creep resistance Al conductors in large quantity will be enormous for the power transmission industry.

Friction-stir extrusion could also represent a new route to the fabrication of extremely specialized materials, such as high-temperature superconducting wires and mechanical alloyed materials.

"The process of melting and casting can destroy the properties of a highly ordered, novel material such as an oxide dispersion strengthened materials or a high-temperature superconductors. Because friction-stir only takes the material up to 'plasticizing' temperatures, the properties of the material are not affected as much," said Zhili Feng, who now leads the ORNL group.

The extrusion process follows the same principle of the friction-stir welding, in which a rapidly spinning tool is applied to the metal, heating it until it becomes soft, but not melted. Because the material is still in its solid state when it is extruded, it suffers none of the degradation and transformation that would occur with actual melting.

"The process of melting is very detrimental to those properties," said Feng.

Wayne Thomas, who pioneered the friction stir technology at The Welding Institute in England, says ORNL has proved the basic principle of a new technique that could be key to working with advanced alloys, including high-temperature superconductors.

"It is very difficult to mix silicon, titanium, magnesium and other materials in to alloys and turn them into molten metals. If you can mix them in the solid phase, it is much better, and there are mixtures you can't even consider outside a solid phase," Thomas said.

One such application is the fabrication of mechanically alloyed magnesium alloys into components. Friction-stir extrusion has potential to be a low-cost way to produce product forms with this lightweight and high-performance metal. ORNL is extensively involved in the magnesium alloy R&D and technology transfer and commercialization.

The energy savings of this process are significant: The process requires only 10 to 20 percent of the energy required for conventional melting with potential saving of more than 80 percent.

The team credits DOE's Industrial Technologies Program for a capital equipment investment and programmatic funding that enabled them to establish the prototype friction-stir work station at ORNL. The ORNL team is already seeing industry interest in what they've accomplished so far with the technology. One of the companies is Southwire Company, a major international electric cable company, that is currently working with ORNL on the technology development.

Kiran Manchiraju, director at Southwire Company, said, "The collaborative research between Southwire and ORNL using friction extrusion to synthesize new alloys has yielded promising results. We are excited, that the continued success of this project may result in large scale production of innovative wire and cable products."— Bill Cabage, July 25, 2011

####

For more information, please click here

Contacts:
Bill Cabage

Copyright © Oak Ridge National Laboratory

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

'Exotic' material is like a switch when super thin April 18th, 2014

Innovative strategy to facilitate organ repair April 18th, 2014

Oxford Instruments Asylum Research Introduces the MFP-3D InfinityTM AFM Featuring Powerful New Capabilities and Stunning High Performance April 18th, 2014

Conductive Inks: booming to $2.8 billion by 2024 April 17th, 2014

Superconductivity

Scientists Capture Ultrafast Snapshots of Light-Driven Superconductivity: X-rays reveal how rapidly vanishing 'charge stripes' may be behind laser-induced high-temperature superconductivity April 16th, 2014

Scientists observe quantum superconductor-metal transition and superconducting glass: A team including MIPT physicist observed quantum superconductor-metal transition and superconducting glass April 16th, 2014

Laboratories

Scientists Capture Ultrafast Snapshots of Light-Driven Superconductivity: X-rays reveal how rapidly vanishing 'charge stripes' may be behind laser-induced high-temperature superconductivity April 16th, 2014

'Life Redesigned: The Emergence of Synthetic Biology' Lecture at Brookhaven Lab on Wednesday, April 30: Biomedical Engineer James Collins to Speak for BSA Distinguished Lecture Series April 16th, 2014

Relieving electric vehicle range anxiety with improved batteries: Lithium-sulfur batteries last longer with nanomaterial-packed cathode April 16th, 2014

Govt.-Legislation/Regulation/Funding/Policy

'Exotic' material is like a switch when super thin April 18th, 2014

Innovative strategy to facilitate organ repair April 18th, 2014

Novel stapled peptide nanoparticle combination prevents RSV infection, study finds April 17th, 2014

INSCX™ exchange to present Exchange trade reporting mechanism for engineered nanomaterials (NMs) to UK regulation agencies, insurers and upstream/downstream users April 17th, 2014

Discoveries

'Exotic' material is like a switch when super thin April 18th, 2014

Innovative strategy to facilitate organ repair April 18th, 2014

Thinnest feasible membrane produced April 17th, 2014

More effective kidney stone treatment, from the macroscopic to the nanoscale April 17th, 2014

Announcements

'Exotic' material is like a switch when super thin April 18th, 2014

Innovative strategy to facilitate organ repair April 18th, 2014

Oxford Instruments Asylum Research Introduces the MFP-3D InfinityTM AFM Featuring Powerful New Capabilities and Stunning High Performance April 18th, 2014

Transparent Conductive Films and Sensors Are Hot Segments in Printed Electronics: Start-ups in these fields show above-average momentum, while companies working on emissive displays such as OLED are fading, Lux Research says April 17th, 2014

Patents/IP/Tech Transfer/Licensing

Harris & Harris Group Notes Mersana's Collaboration Agreement With Subsidiary of Takeda Pharmaceutical Co. April 8th, 2014

Nanoparticles cause cancer cells to self-destruct April 3rd, 2014

A*STAR's Simtech collaboration agreements to accelerate the growth and development of the microfluidics industry April 1st, 2014

Dolomite releases novel droplet-on-demand sequencing and droplet generation microfluidic system April 1st, 2014

Research partnerships

Novel stapled peptide nanoparticle combination prevents RSV infection, study finds April 17th, 2014

Scientists Capture Ultrafast Snapshots of Light-Driven Superconductivity: X-rays reveal how rapidly vanishing 'charge stripes' may be behind laser-induced high-temperature superconductivity April 16th, 2014

Scalable CVD process for making 2-D molybdenum diselenide: Rice, NTU scientists unveil CVD production for coveted 2-D semiconductor April 8th, 2014

Carbon nanotubes grow in combustion flames April 1st, 2014

NanoNews-Digest
The latest news from around the world, FREE







  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More














ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE