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http://dx.doi.org/10.3795/KSME-A.2013.37.9.1109

Spatial Randomness of Fatigue Crack Growth Rate in Friction Stir Welded 7075-T651 Aluminum Alloy Welded Joints (Case of LT Orientation Specimen)  

Jeong, Yeui Han (Dept. of Mechanical Design Engineering, Graduate School, Pukyong Nat'l Univ.)
Kim, Seon Jin (Dept. of Mechanical & Automotive Engineering, Pukyong Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.37, no.9, 2013 , pp. 1109-1116 More about this Journal
Abstract
This study aims to investigate the spatial randomness of fatigue crack growth rate for the friction stir welded (FSWed) 7075-T651 aluminum alloy joints. Our previous fatigue crack growth test data are adopted in this investigation. To clearly understand the spatial randomness of fatigue crack growth rate, fatigue crack growth tests were conducted under constant stress intensity factor range (SIFR) control testing. The experimental data were analyzed for two different materials-base metal (BM) and weld metal (WM)-to investigate the effects of spatial randomness of fatigue crack growth rate and material properties, the friction stir welded (FSWed) 7075-T651 aluminum alloy joints, namely weld metal (WM) and base metal (BM). The results showed that the variability, as evaluated by Weibull statistical analysis, of the WM is higher than that of the BM.
Keywords
Fatigue Crack Growth; Friction Stir Welding; Spatial Randomness; Weibull Distribution;
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Times Cited By KSCI : 4  (Citation Analysis)
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