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

Technology

Marad Visits TX Maritime Technology & Training Center

United States Maritime Administration tours Maritime Technology and Training Center site.   Administrators from the United States Maritime Administration (MARAD),

Bergeron to be Keynote Speaker at SHIPPINGInsight

Scott Bergeron, CEO of the Liberian International Ship & Corporate Registry (LISCR), has agreed to serve as a keynote speaker at the SHIPPINGInsight 2015 Fleet Optimization Conference & Exhibition,

Tanker Retrofitted with Dual Fuel Engine

Caterpillar Marine informs it has begin a dual fuel engine retrofit conversion onboard the 472-foot Fure West tanker, owned by Furetank Rederi A/B. The MaK M 43

Navy

Pressure for Australia Sub Deal Grows

Australia to spend A$65 bln on ships and subs over 20 years; PM pledges A$40 bln for domestic shipbuilders. Australia will spend A$89 billion ($65 billion) on

Asian Nations Call for Stop to South China Sea Land Work

Calls grow for China to halt land reclamation. Southeast Asian countries on Tuesday backed a U.S. call to halt land reclamation in the South China Sea, underlining

Australian PM Promises 2500 Shipbuilding Jobs

Up to 2,500 shipbuilding jobs in Adelaide will be safe for "all time", the Prime Minister says, ahead of the expected announcement to build a new fleet of Navy ships worth $39 billion, reports ABC.

Marine Materials

Coast Guard Monitors Oil Recovery Ops near Bayonne, NJ

Coast Guard crews are continuing to monitor oil recovery operations (ORO) in the water near the International-Matex Tank Terminal (IMTT) Bayonne, New Jersey, Monday.

Harper Government Invests in Naufrage Harbor

The Honorable Gail Shea, Minister of Fisheries and Oceans, announced today an investment to improve safety and working conditions for fishermen at Naufrage Harbor, Prince Edward Island.

Self-lubricating Bearing Polymer: Safe, Easy to Machine

Many plastics and metallic alloys present machining challenges as some deform and are difficult to maintain exacting tolerances, while others require strict and

Marine Equipment

Latest USCG Cutter At Boston Harbor

The Coast Guard’s latest 418-foot National Security Cutter James (WSML 754) entered Boston Harbor August 3, 2015. The James is the fifth of eight planned National

LNG Ferry Construction for Tallink Begins

The start of production of Tallink's new generation LNG powered fast ferry for the Tallinn-Helsinki route was celebrated on the 4th of August 2015 at Meyer Turku shipyard.

NYK Hosts Safety Conference

Over three dates in July, NYK hosted a safety promotion conference for shipowners and ship-management companies at the NYK head office in Tokyo and at Imabari city in Ehime prefecture.

 
 
Maritime Contracts Maritime Security Maritime Standards Navigation Offshore Oil Pipelines Salvage Ship Electronics Shipbuilding / Vessel Construction Winch
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: 0.1475 sec (7 req/sec)