SPECIAL NOTICE
A -- TECHNOLOGY/BUSINESS OPPORTUNITY Use of Diode Arrays for High-Efficiency Light-AssistedFriction Stir Processing and Welding of Metals andMetallic Alloys
- Notice Date
- 8/6/2012
- Notice Type
- Special Notice
- NAICS
- 238990
— All Other Specialty Trade Contractors
- Contracting Office
- Department of Energy, Lawrence Livermore National Laboratory (DOE Contractor), Industrial Partnerships & Commercialization, 7000 East Avenue, L-795, Livermore, California, 94550
- ZIP Code
- 94550
- Solicitation Number
- FBO256-12
- Archive Date
- 9/10/2012
- Point of Contact
- Connie L Pitcock, Phone: 925-422-1072
- E-Mail Address
-
pitcock1@llnl.gov
(pitcock1@llnl.gov)
- Small Business Set-Aside
- N/A
- Description
- TECHNOLOGY/BUSINESS OPPORTUNITY Use of Diode Arrays for High-Efficiency Light-Assisted Friction Stir Processing and Welding of Metals and Metallic Alloys Opportunity : Lawrence Livermore National Laboratory (LLNL), operated by the Lawrence Livermore National Security (LLNS), LLC under contract with the U.S. Department of Energy (DOE), is offering the opportunity to license and commercialize its technology for High-Efficiency Light-Assisted Friction Stir Processing and Welding of Metals and Metallic Alloys. Background : LLNL has been involved in the investigation of friction stir welding as a means of joining high-temperature radiation-resistant oxide dispersion strengthened (ODS) steels and other alloys for fusion energy applications since 2008. LLNL pioneered the use of photonically enhanced welds, through the introduction of laser peening technology for the closure of welds on spent nuclear fuel containers for Yucca Mountain in the mid-to-late 1990s through the early 2000's, LLNL has continued to investigate the use of photonically assisted joining processes. In conventional friction stir welding (FSW) and friction stir processing (FSP), a rotating cylindrical tool is first plunged into the metal to be processed or welded, and then advanced horizontally along the surface of the metal. In the case of FSW, the rotating tool is advanced along a butt joint between two pieces of metal, the rotating motion of the work piece literally stirs metal from both sides of the joint together thereby producing a solid state joint between the two. In the case of FSP, the stirring causes the refinement of grains in the material, eliminates porosity and voids in castings thereby producing a material with superior material properties. In both processes, friction heat is generated between the tool and welded materials which softens the material enabling flow but without reaching the melting point. Description : LLNL's invention uses energy efficient diode arrays for softening metals and alloys to enable friction stir process and friction stir welding. The use of intense light from compact, light-weight, and energy-efficient diode arrays to preheat the material being processed to the softening point eliminates defects associated with insufficient weld temperature such as tunnel voids. The diode light heating enhancement (DLHE) of FSW also enables residual weld stress in the stir zone (SZ), the thermo-mechanically aaffected zone (TAZ) and the heat affected zone (HAZ) is controlled and minimized. The efficient and precisely controlled heating provided to FSW and FSP by DLHE can ultimately enable engineers to better control the microstructure that evolves in the weld. The use of DLHE softens the material that the FSP or FSW tool must traverse thereby reducing load and wear which will substantially extend tool life and lower processing cost. Softening also enables welds to be traversed more quickly by the tool thereby increasing the processing rate which will also lower processing costs. Advantages : The benefits of LLNL's invention which leverages diode technology developed at the Laboratory include: •· pre-heating and softening of the material being processed greatly reduces the load on the FSP and FSW tool as well as the wear rate and can therefore extend tool life and reduce processing costs; •· pre-heating and softening of the material also enables the tool to traverse the material more rapidly thereby increasing the rate of processing which also contributes to reduced processing costs; •· reducing the number of defects associated with non-uniform and insufficient heating by the stir tool such as the formation of tunnel-type voids by controlling the heating of the weld zone; •· the exit hole remaining after retraction of the stir tool and the defects related to this extraction are well known problems with FSP and FSW that can be mitigated with additional heating of exit point with diode arrays; •· diode heating will also enable the application of FSP and FSW to a broader range of materials including refractory metals and alloys, cermets, ceramics polymers and plastics through the application of controlled localized softening; •· the light source can be used for the thermal post processing to anneal the SZ, TMZ, and HAX thereby relating residual tensile stresses and reducing the changes of stress corrosion cracking and corrosion fatigue in these regions. Potential Applications : Aerospace, nuclear and ship building companies may find LLNL's technology useful for improving and increasing the processing rate for the conventional friction stir welding, welding of new materials, and thermal post processing of welds. Development Status: LLNL is filing for patent protection for this invention. LLNL is seeking industry partners with a demonstrated ability to bring such inventions to the market. Moving critical technology beyond the Laboratory to the commercial world helps our licensees gain a competitive edge in the marketplace. All licensing activities are conducted under policies relating to the strict nondisclosure of company proprietary information. Please visit the IPO website at http://ipo.llnl.gov/workwithus/partneringprocess.php for more information on working with LLNL and the industrial partnering and technology transfer process. Note: THIS IS NOT A PROCUREMENT. Companies interested in commercializing LLNL's Use of Diode Arrays for High-Efficiency Light-Assisted Friction Stir Processing and Welding of Metals and Metallic Alloys technology should provide a written statement of interest, which includes the following: 1. Company Name and address. 2. The name, address, and telephone number of a point of contact. •3. A description of corporate expertise and facilities relevant to commercializing this technology. Written responses should be directed to: Lawrence Livermore National Laboratory Industrial Partnerships Office P.O. Box 808, L-795 Livermore, CA 94551-0808 Attention: FBO 256-12 Please provide your written statement within thirty (30) days from the date this announcement is published to ensure consideration of your interest in LLNL's Use of Diode Arrays for High-Efficiency Light-Assisted Friction Stir Processing and Welding of Metal and Metallic Alloys technology.
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- Record
- SN02827796-W 20120808/120806234843-ed977d2810397d4f12c2935945d4a6bb (fbodaily.com)
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