NDLI: Reliability evaluation of 7A60 aluminum alloy with defects

Content Provider	IEEE Xplore Digital Library
Author	Kai Zhao Yiqiang Kou
Copyright Year	2009
Description	Author affiliation: School of Material Science and Engineering Tianjin University Tianjin, China (Kai Zhao) \|\| Research Institute of Physical and Chemical Engineering of Nuclear Industry Tianjin, China (Yiqiang Kou)
Abstract	Reliability of 7A60 Aluminum Alloy with defects is evaluated. Creep fracture time of the alloy with artificial scrape under constant load is measured at a dedicated temperature. In addition, size allowance of outer surface defects of the alloy is calculated and reliability of the alloy is evaluated according to the stress strength factor threshold Kth of creep fracture obtained by the creep testing of the alloy cylinders. The stress strength factor threshold Kth of creep rupture of Al alloy is $16MPam^{1/2}$ and the depth allowance $a^{∗}$ of outer surface scrape is 0.18 millimeter when the maximal service stress of Al alloy is half of the yield strength of the alloy and allowable stress strength factor KI(allowance) is $8MPam^{1/2}.$ These results are consistent with that from the accelerated life testing of Al alloy cylinders with defects. These results indicate that Al alloy with cracks less than 0.18 millimeter in depth rarely creep or rupture and could be used safely in a high-speed rotary device for a long term.
Starting Page	1208
Ending Page	1211
File Size	1275741
Page Count	4
File Format	PDF
ISBN	9781424449033
DOI	10.1109/ICRMS.2009.5270037
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-07-20
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Temperature Creep depth allowance of crack 7A60 Aluminum Alloy Life testing reliability Aluminum alloys Time measurement creep fracture Stress Surface treatment Life estimation Surface cracks Engine cylinders
Content Type	Text
Resource Type	Article

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