Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > New Technique Creates Stronger, Lightweight Magnesium Alloys

Nano-spaced stacking faults are parallel fault-lines in the structure of the alloy that increase the strength of the material.
Nano-spaced stacking faults are parallel fault-lines in the structure of the alloy that increase the strength of the material.

Abstract:
"Ultrastrong Mg-Alloy via Nano-Spaced Stacking Faults"

Authors: W. W. Jian, G. M. Cheng, W. Z. Xu, H. Yuan, M. H. Tsai, C. C. Koch, Y. T. Zhu and S. N. Mathaudhu, North Carolina State University; Q. D. Wang, Shangai Jiaotong University

Published: Online March 12, 2013 in Materials Research Letters

Abstract: Mg alloys are among the lightest alloys but they are usually weak. Here we report a new mechanism to make them ultrastrong while maintaining good ductility. Stacking faults with nanoscale spacing were introduced into a Mg-8.5Gd-2.3Y-1.8Ag-0.4Zr (wt.%) alloy by conventional hot rolling, which produced a yield strength of ~575 MPa, an ultimate strength of ~600 MPa, and a uniform elongation of ~5.2%. Low stacking fault energy enabled the introduction of a high density of stacking faults, which impeded dislocation slip and promoted dislocation accumulation. These findings provide guidance for developing Mg alloys with superior mechanical properties.

New Technique Creates Stronger, Lightweight Magnesium Alloys

Raleigh, NC | Posted on March 13th, 2013

Researchers from North Carolina State University have developed a new technique for creating stronger, lightweight magnesium alloys that have potential structural applications in the automobile and aerospace industries.

Engineers constantly seek strong, lightweight materials for use in cars and planes to improve fuel efficiency. Their goal is to develop structural materials with a high "specific strength," which is defined as a material's strength divided by its density. In other words, specific strength measures how much load it can carry per unit of weight.

Researchers at NC State focused on magnesium alloys because magnesium is very light; on its own, though, it isn't very strong. In the study, however, the researchers were able to strengthen the material by introducing "nano-spaced stacking faults." These are essentially a series of parallel fault-lines in the crystalline structure of the alloy that isolate any defects in that structure. This increases the overall strength of the material by approximately 200 percent.

"This material is not as strong as steel, but it is so much lighter that its specific strength is actually much higher," says Dr. Suveen Mathaudhu, a co-author of a paper on the research and an adjunct assistant professor of materials science and engineering at NC State under the U.S. Army Research Office's Staff Research Program. "In theory, you could use twice as much of the magnesium alloy and still be half the weight of steel. This has real potential for replacing steel or other materials in some applications, particularly in the transportation industry - such as the framework or panels of vehicles."

The researchers were able to introduce the nano-spaced stacking faults to the alloy using conventional "hot rolling" technology that is widely used by industry. "We selected an alloy of magnesium, gadolinium, yttrium, silver and zirconium because we thought we could introduce the faults to that specific alloy using hot rolling," says Dr. Yuntian Zhu, a professor of materials science and engineering at NC State and co-author of the paper. "And we were proven right."

"Because we used existing technology, industry could adopt this technique quickly and without investing in new infrastructure," Mathaudhu says.

The paper, "Ultrastrong Mg-Alloy via Nano-Spaced Stacking Faults," was published online March 12 in Materials Research Letters and was co-authored by NC State Ph.D. students W.W. Jian, W.Z. Xu and H. Yuan; postdoctoral researcher Dr. G.M. Cheng; Dr. Carl Koch, Kobe Steel Distinguished Professor of Materials Science and Engineering at NC State; Dr. M.H. Tsai, a former visiting scientist at NC State; and Dr. Q.D. Wang, of Shanghai Jiaotang University. The work was supported by the U.S. Army Research Office.

####

For more information, please click here

Contacts:
Matt Shipman

919-515-6386

Dr. Yuntian Zhu

919.513.0559

Dr. Suveen Mathaudhu

Copyright © North Carolina State University

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 Links

Download paper:

Related News Press

News and information

Haydale Secures Exclusive Development and Supply Agreement with Tantec A/S: New reactors to be built and commissioned by Tantec A/S represent another step forward towards the commercialisation of graphene October 24th, 2014

QuantumWise guides the semiconductor industry towards the atomic scale October 24th, 2014

MEMS & Sensors Technology Showcase: Finalists Announced for MEMS Executive Congress US 2014 October 23rd, 2014

Nanoparticle technology triples the production of biogas October 23rd, 2014

Govt.-Legislation/Regulation/Funding/Policy

Novel Rocket Design Flight Tested: New Rocket Propellant and Motor Design Offers High Performance and Safety October 23rd, 2014

Strengthening thin-film bonds with ultrafast data collection October 23rd, 2014

Brookhaven Lab Launches Computational Science Initiative:Leveraging computational science expertise and investments across the Laboratory to tackle "big data" challenges October 22nd, 2014

Bipolar Disorder Discovery at the Nano Level: Tiny structures found in brain synapses help scientists better understand disorder October 22nd, 2014

Discoveries

QuantumWise guides the semiconductor industry towards the atomic scale October 24th, 2014

Iranian, Malaysian Scientists Study Nanophotocatalysts for Water Purification October 23rd, 2014

Nanoparticle technology triples the production of biogas October 23rd, 2014

Strengthening thin-film bonds with ultrafast data collection October 23rd, 2014

Materials/Metamaterials

Researchers patent a nanofluid that improves heat conductivity October 22nd, 2014

Materials for the next generation of electronics and photovoltaics: MacArthur Fellow develops new uses for carbon nanotubes October 21st, 2014

Super stable garnet ceramics may be ideal for high-energy lithium batteries October 21st, 2014

Could I squeeze by you? Ames Laboratory scientists model molecular movement within narrow channels of mesoporous nanoparticles October 21st, 2014

Announcements

Haydale Secures Exclusive Development and Supply Agreement with Tantec A/S: New reactors to be built and commissioned by Tantec A/S represent another step forward towards the commercialisation of graphene October 24th, 2014

QuantumWise guides the semiconductor industry towards the atomic scale October 24th, 2014

Advancing thin film research with nanostructured AZO: Innovnano’s unique and cost-effective AZO sputtering targets for the production of transparent conducting oxides October 23rd, 2014

Strengthening thin-film bonds with ultrafast data collection October 23rd, 2014

Military

NanoTechnology for Defense (NT4D) October 22nd, 2014

Crystallizing the DNA nanotechnology dream: Scientists have designed the first large DNA crystals with precisely prescribed depths and complex 3D features, which could create revolutionary nanodevices October 20th, 2014

Imaging electric charge propagating along microbial nanowires October 20th, 2014

1980s aircraft helps quantum technology take flight October 20th, 2014

Automotive/Transportation

Production of Anticorrosive Chromate Nanocoatings in Iran September 27th, 2014

Teijin Aramid’s carbon nanotube fibers awarded with Paul Schlack prize: New generation super fibers bring wave of innovations to fiber market September 25th, 2014

Next-Gen Luxury RV From Global Caravan Technologies Will Offer MagicView Roof and Windshield Using SPD-SmartGlass Technology From Research Frontiers: Recreational Vehicle Manufacturer Global Caravan Technologies (GCT) Features 28 Square Feet of MagicView™ SPD-SmartGlass September 17th, 2014

Toward making lithium-sulfur batteries a commercial reality for a bigger energy punch September 17th, 2014

Aerospace/Space

Novel Rocket Design Flight Tested: New Rocket Propellant and Motor Design Offers High Performance and Safety October 23rd, 2014

Removal of Limitations of Composites at Superheat Temperatures October 20th, 2014

1980s aircraft helps quantum technology take flight October 20th, 2014

Electrically conductive plastics promising for batteries, solar cells October 10th, 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