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

Technology

Kongsberg Expands Louisiana Office, Training Facility

Kongsberg Maritime has purchased approximately 5.2 acres for new construction on an 82,980 sq ft office and training facility. Construction on the James Business

Navigational Charts App Debuts at Ocean Business

An independent consultancy and software development company will launch a new web and PC based navigational charting app at Ocean Business 2015.   Norcom Technology

Reftrade Upgrades Fleet Refrigeration Systems

Reftrade UK  has made an investment  to upgrade its fleet with environmentally friendly technology. The world’s first refrigeration system to use CO2 as a natural refrigerant,

Navy

Australia Gives Landing Craft to the Philippines

The Australian Government will gift two recently-decommissioned Landing Craft Heavy vessels, including a package of spare parts, to the Philippines Government,

Cutlass Express 2015 Commences

Maritime forces from East Africa, South Africa, Europe, Indian Ocean nations, the United States and several international organizations began the fourth iteration

India Seeks Submarine Cooperation with Japan

The government of India has put forward a proposal of over Rs 50,000 crore ($6 billion) project to construct six stealth submarines in India. India is especially

Marine Equipment

Kongsberg Expands Louisiana Office, Training Facility

Kongsberg Maritime has purchased approximately 5.2 acres for new construction on an 82,980 sq ft office and training facility. Construction on the James Business

First Container for LNG Hybrid Barge

The HUMMEL (bumblebee) LNG Hybrid Barge will enable Becker Marine Systems to supply low-emission power to cruise ships lying at port in Hamburg. The first container

IntelliJet: Cleantech Propulsion for High Speed Applicatios

IntelliJet Marine, Inc. will present a paper on propulsion and computer simulation for sustainable high speed boats and ships at ASNE Day 2015.   Jeff Jordan

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Security Offshore Oil Pipelines Ship Electronics Ship Repair Ship Simulators Sonar Winch
rss | archive | history | articles | privacy | terms and conditions | 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: 0.3207 sec (3 req/sec)