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 July 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Technology

Navy Autonomous Underwater Vehicle Delivery Milestone

Commander, Submarine Development Squadron 5 (CSDS 5), Detachment UUV, informs of the delivery of Large Training Vehicle 38 (LTV 38), an unmanned undersea vehicle (UUV),

Policy Uncertainty Threatens to Slow Renewable Energy Momentum

IEA forecast sees renewable power as a cost-competitive option in an increasing number of cases, but facing growing risks to deployment over the medium term. The

Ecospeed Fuel and Cost Saving Solutions at SMM

Ecospeed announced it will exhibit its line of fuel and cost saving solutions at SMM in Hamburg. Ecospeed and fuel savings Routine in-water cleaning results

Navy

Navy Autonomous Underwater Vehicle Delivery Milestone

Commander, Submarine Development Squadron 5 (CSDS 5), Detachment UUV, informs of the delivery of Large Training Vehicle 38 (LTV 38), an unmanned undersea vehicle (UUV),

HMS Illustrious Decommissioned

HMS Illustrious – the last of the Royal Navy’s Invincible-class aircraft carriers – was decommissioned at Portsmouth Naval Base today, marking the end of her 32-year career.

Today in U.S. Naval History: August 28

Today in U.S. Naval History - August 28 1867 - Capt. William Reynolds of Lackawanna raises U.S. flag over Midway Island and took formal possession of these islands for the U.

Marine Equipment

Daihatsu Joins ClassNK Research Project

Classification society ClassNK announced that it will embark on a joint research project together with Daihatsu Diesel Mfg. Co., Ltd. Through the partnership, ClassNK

GPS Discharge Control System for Food Waste

Through a cooperation with Marine Position AB, Uson Marine AB can now offer functionality from the Seatrade award winning system Environmental Navigator for its

Kongsberg to Supply FPSO Safety System

Kongsberg Maritime Engineering (KME), the wholly owned Engineering, Procurement and Construction (EPC) subsidiary of global maritime technology developer Kongsberg Maritime,

 
 
Maritime Careers / Shipboard Positions Maritime Standards Navigation Offshore Oil Salvage Ship Electronics Ship Repair Ship Simulators Shipbuilding / Vessel Construction 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: 0.1176 sec (9 req/sec)