Effect of Stress Ratio on the Fatigue Behavior of a Friction Stir Processed Cast Al-Si-Mg Alloy
Journal Article
·
· Scripta Materialia, 61(10):992-995
The effect of friction stir processing (FSP) on the fatigue life of a cast Al-7Si-0.6Mg alloy at a stress ratio of R=0 was evaluated. Two types of specimen geometry were used for the FSPed condition, through-thickness processed and partial thickness processed. FSP enhanced the fatigue life by a factor of 15 for the through thickness processed samples at lower stress amplitudes. This is different from the FSP specimens tested at R=-1 and similar stress amplitudes where a 5 times improvement in fatigue life was observed. In light of these observations, various closure mechanisms were examined.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 969607
- Report Number(s):
- PNNL-SA-68049; SCMAF7; VT0504000; TRN: US201001%%722
- Journal Information:
- Scripta Materialia, 61(10):992-995, Vol. 61, Issue 10; ISSN 1359-6462
- Country of Publication:
- United States
- Language:
- English
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