Accession Number : ADA017449

Title :   Effects of Planar Weld Defects on the Fatigue Properties of 5083/5183 Aluminum Alloy Welds.

Descriptive Note : Milestone cost and progress rept. Jun-Nov 75,

Corporate Author : ILLINOIS UNIV AT URBANA-CHAMPAIGN DEPT OF CIVIL ENGINEERING

Personal Author(s) : Lawrence,F. V.

Report Date : 31 OCT 1975

Pagination or Media Count : 9

Abstract : The lack of penetration defects (LOP) can substantially reduce the fatigue life of these welds. The largest defects reduce the fatigue life the most. At 19 ksi., the largest LOP (2a approximately equal to 0.15 in.) can reduce the fatigue life from 80,000 cycles to 2,000 cycles. At 12 ksi., the largest LOP can reduce fatigue life from 4,000,000 cycles to 8,000 cycles. In most cases, the LOP had porosity associated with them. The fatigue crack initiation site usually includes these pores; consequently, the above data reflects the fatigue resistance of LOP with associated porosity.

Descriptors :   *WELDS, ALUMINUM ALLOYS, FATIGUE(MECHANICS), DEFECTS(MATERIALS), FATIGUE LIFE, PENETRATION

Subject Categories : Couplers, Fasteners, and Joints

Distribution Statement : APPROVED FOR PUBLIC RELEASE