Fatigue performance of 2017-T4 AL. alloy under sub-zero temperature by using electromechanical freezing system

The effects of sub-zero(-22Co) cyclic rotating bending on the S-N behavior and cumulative damage are reported for 207-T4 aluminum alloy .Experimental characterization of fatigue behavior showed that the S-N curves behavior may described by the following Basquin's formulas: σ_f=1230〖(N_f)〗^(-0.1...

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Bibliographic Details
Published in:	Engineering and Technology Journal Vol. 34; no. 14A; pp. 2631 - 2641
Main Authors:	al-Alkawi, Husayn Jasim Muhammad, Fattah, Fikrat Abd al-Karim, Kazim, Dua Amir
Format:	Journal Article
Language:	English
Published:	Baghdad, Iraq University of Technology 01-12-2016 Unviversity of Technology- Iraq
Subjects:	al alloy cumulative fatigue damage fatigue behavior at sub zero temperature
Online Access:	Get full text
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Summary:	The effects of sub-zero(-22Co) cyclic rotating bending on the S-N behavior and cumulative damage are reported for 207-T4 aluminum alloy .Experimental characterization of fatigue behavior showed that the S-N curves behavior may described by the following Basquin's formulas: σ_f=1230〖(N_f)〗^(-0.15) At room temperature (RT) And σ_f=1563〖(N_f)〗^(-0.17) At sub-zero temperature (-22Co) From the above equation, the fatigue behavior can be change at σ_f=204 MPa and N_f=159475 cycles . Slightly increase in fatigue life results above 204 MPa and slightly decrease in fatigue below the 204 MPa stress level. A non-linear experimental law is introduced for the accumulation of damage at sub-zero temperature variable fatigue. This law gave conservative and safe fatigue life time prediction when applying to the data of variable fatigue at low temperature (-22 Co).
ISSN:	1681-6900 2412-0758
DOI:	10.30684/etj.34.14A.8