Study of fatigue crack growth rate for austenitic Fe-Al-Mn alloys
- Tatung Inst. of Tech., Taipei (Taiwan, Province of China)
- Industrial Technology Research Inst., Hsinchu (Taiwan, Province of China). Center for Aviation and Space Technology
A study was made of the crack growth rate (da/dN) versus stress-intensity variation ({Delta}K) behavior of Fe-Al-Mn alloys with different percentages of carbon, aluminum, and manganese at ambient temperature. The experimental results are described with respect to a Paris equation, da/dN = C({Delta}K){sup n}, where the exponent n, index for crack growth resistance of materials, was strongly influenced by alloy composition. It was found that higher manganese content provided better crack growth resistance, and that carbon and aluminum had an opposite effect. Scanning electron microscopy, x-ray diffraction, and mechanical properties evaluation were performed and correlated to the change of n values.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 136972
- Journal Information:
- Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 5 Vol. 4; ISSN 1059-9495; ISSN JMEPEG
- Country of Publication:
- United States
- Language:
- English
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