Patrick Ryan Rogers
Engineering at Springfield Ln, Madison, AL
License number
Louisiana EI.0013418
Issued Date
Jan 1, 1900
Expiration Date
Mar 31, 2002
Category
Civil Engineer
Address
Address
100 Springfield Ln, Madison, AL 35758
Professional information
Method For Repair Welding Aluminum-Lithium Alloys
US Patent:
6003755, Dec 21, 1999
Filed:
Feb 20, 1997
Appl. No.:
8/803481
Inventors:
Sandeep Rajnikant Shah - Madison AL
Lynda Louise Johnston - Madison AL
Julian Ervin Bynum - Harvest AL
Samuel Dwight Clark - Woodville AL
Benny Floyd Graham - Guntersville AL
Ronald Brian Renfroe - Huntsville AL
Patrick Ryan Rogers - Madison AL
Lynda Louise Johnston - Madison AL
Julian Ervin Bynum - Harvest AL
Samuel Dwight Clark - Woodville AL
Benny Floyd Graham - Guntersville AL
Ronald Brian Renfroe - Huntsville AL
Patrick Ryan Rogers - Madison AL
Assignee:
Lockheed Martin Corp. - New Orleans LA
International Classification:
B21D 3102
US Classification:
228119
Abstract:
Aluminum-lithium alloy sheets which are welded together are examined to identify regions requiring repair. A grid is applied to the sheet about the region requiring repair, and the region to be repaired is ground out and rewelded. Residual stresses are relieved by planishing yes to cause localized plastic deformation in the repaired region. The grid is used as a guide to restoring the original dimensions of the sheet in a manner which tends to reduce in-plane shrinkage. The reduced in-plane shrinkage in turn tends to reduce undesired tensile residual stresses. The planishing also tends to work-harden the weld filler.