NSWC Carderock Receives Patent for Galfenol Discovery, Development

By Brian Hibben, Naval Surface Warfare Center Carderock Public Affairs
Sunday, November 18, 2012
Image courtesy of NSWC Carderock

Naval Surface Warfare Center (NSWC) Carderock received a patent Nov. 13 for their discovery and development of a new smart material called Galfenol.


Galfenol is a magnetostrictive smart material that can be used in sensors, actuators and structural supports. The material was co-discovered in 1999 by NSWC Carderock and the Department of Energy's Ames Laboratory and has been in development for the past 13 years in partnership with Etrema Products Inc.
"By itself, iron has the characteristics to be considered a magnetostrictive material, which is material that changes shape when a magnetic field or pressure is applied to it," explained NSWC Carderock senior research scientist, Marilyn Wun-Fogle. "In 1999, we discovered that combining iron with gallium amplifies iron's magnetostrictive capability tenfold. Iron-gallium, or Galfenol, is ductile [capable of being drawn out into wire or thread], stable over a wide temperature range and has energy-harvesting capabilities."
 

Magnetostrictive materials, such as Galfenol, are of interest to the Navy because they can be used to make actuators and sonar transducers that are used in ships and submarines. Currently, actuators and sonar transducers are made of a material that is more brittle than Galfenol. Galfenol can be used in structural supports for vibrating pieces of machinery such as a generator. As the piece of machinery is running, Galfenol can capture the vibrational energy which can be re-harvested. As a result, less energy is transmitted to the hull of the ship or submarine, which could reduce its acoustic footprint.
 

"Galfenol can be machined and welded with common metalworking tools which makes it very versatile," continued Wun-Fogle. "Plus, it is magnetostrictively active under tensile stress conditions up to approximately 150 degrees Celsius and to much higher temperatures under compressive stress conditions."
Initially funded by the Office of Naval Research (ONR), the Department of Energy and NSWC Carderock's In-House Laboratory Independent Research Program, continued development of Galfenol is being funded by ONR and the Small Business Innovation Research Program.
 

"For more than a decade, we have teamed with our partners to design Galfenol as well as develop processes to produce the material in large solid form, rolled sheets, and more recently, wires," said NSWC Carderock's senior research scientist James Restorff. "The wide variety of forms allows Galfenol-based parts to be used in a variety of new applications, both commercial and military."
 

Maritime Reporter April 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Technology

Intelligent Fender System Completes Offshore Trial

Strainstall, part of James Fisher and Sons plc, announced the completion of the world’s first Intelligent Fender System (IFS) trial with energy companies SSE and RWE at Suffolk-based wind farm,

DMA Announce New Requirements for Refresher Courses

On 1 January 2017, new regulations enter into force on refresher courses in the areas of maritime safety and fire-fighting. Therefore, the Danish Maritime Authority has issued a new order.

Royal IHC Congratulates the King in a Special Way

Royal IHC is very honored to be part of the program on the King’s Birthday. Among other activities, the King and his family will be viewing a ‘Grande Maritime Parade’ in Dordrecht.

Navy

Northrop Grumman Navigation Systems for Canadian Navy

Northrop Grumman Corporation's Sperry Marine business unit has been selected to design and supply gyrocompass navigation systems for 12  Kingston Class coastal

Maritime Tension Dominates Southeast Asia Summit

Southeast Asian leaders edged closer to open criticism of China's land reclamation in the disputed South China Sea at a regional summit on Monday, as the Philippines

BIMCO Welcomes EU Decision on Migrants

BIMCO has stated today that it appreciates the new efforts by EU leaders to reduce increasing reliance on merchant shipping to rescue the growing numbers of

Marine Materials

HMS Prince of Wales Bridge Sets Sail

The bridge section of the second Queen Elizabeth Class aircraft carrier set sail today from Glasgow on its first sea voyage to Rosyth.   Upper Block 07 is where

Rotork Acquires Masso

Rotork announced it has acquired Masso Ind s.p.a., a manufacturer of shipboard valve remote control systems (VRCS), to enhance its range of flow control products

Naust Marine Wins Huge Winch Order

58 electric winches for two new fishing trawlers   Hradfrystihusid Gunnvor (HG) and Vinnslustodin (VSV) recently awarded Naust Marine contracts to provide a complete

Marine Equipment

Cashman Continues to Expand US Northeast Barge Fleet

Cashman Equipment Corp. announced the continuing expansion of its U.S. Northeast barge and crane fleet for the marine construction market.   Over the past year,

Online BWM Tools Launched

Spreading the word on ballast water management – new free online tools launched   A new online learning portal including a free e-learning course on the Operational

Northrop Grumman Navigation Systems for Canadian Navy

Northrop Grumman Corporation's Sperry Marine business unit has been selected to design and supply gyrocompass navigation systems for 12  Kingston Class coastal

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Security Naval Architecture Navigation Pod Propulsion Ship Electronics Ship Repair Shipbuilding / Vessel Construction Sonar
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.2269 sec (4 req/sec)