Correlation between Scatter in Fatigue Life and Fatigue Crack Initiation Sites in Cast Aluminum Alloys

Paper #:
  • 2012-01-0920

Published:
  • 2012-04-16
Citation:
Zheng, X., Engler-Pinto, C., Su, X., Cui, H. et al., "Correlation between Scatter in Fatigue Life and Fatigue Crack Initiation Sites in Cast Aluminum Alloys," SAE Int. J. Mater. Manf. 5(1):270-276, 2012, https://doi.org/10.4271/2012-01-0920.
Pages:
7
Abstract:
High cycle fatigue tests at a constant positive mean stress have been performed on a Al-Si-Cu cast aluminum alloy. The Random Fatigue Limit (RFL) model was employed to fit the probabilistic S-N curves based on Maximum Likelihood Estimate (MLE). Fractographic studies indicated that fatigue cracks in most specimens initiate from oxide films located at or very close to specimen surface. The RFL model was proved to be able to accurately capture the scatter in fatigue life. The cumulative density function (CDF) of fatigue life determined by RFL fit is found to be approximately equal to the complementary value of the CDF of the near-surface fatigue initiator size.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$28.00
Mail
$28.00
Members save up to 42% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Article
2017-07-26
Event
2018-04-10
Technical Paper / Journal Article
2011-04-12
Training / Education
2017-10-19
Technical Paper / Journal Article
2013-01-09