two stage s-n curve in corrosion fatigue of extruded magnesium alloy az31

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ID: 256502
2009
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Abstract
Tension-compression fatigue tests of extruded AZ31 magnesium alloys were carried out under corrosive environments:(a) high humidity environment (80 %RH) and (b) 5 wt. %NaCl environment. It was found that the reduction rate of fatiguestrength due to corrosive environment was 0.12 under a high humidity and 0.53 under a NaCl environment. It was alsoobserved that under corrosive environments, the S-N curve was not a single curve but a two-stage curve. Above the fatiguelimit under low humidity, the crack nucleation mechanism was due to a localized slip band formation mechanism. Below thefatigue limit under low humidity, the reduction in fatigue strength was attributed to the corrosion pit formation and growth to the critical size for fatigue crack nucleation under the combined effect of cyclic load and the corrosive environment. The critical size was attained when the stress intensity factor range reached the threshold value for crack growth.
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mutoh2009songklanakarintwo Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Yoshiharu Mutoh;M.S. Shahnewaz Bhuiyan
Journal ferroelectrics
Year 2009
DOI
DOI not found
URL
http://www.rdoapp.psu.ac.th/html/sjst/journal/31-5/0125-3395-31-5-463-470.pdf
Keywords
humidity fatigue magnesium alloy nacl corrosion fatigue technologytechnology (general)sciencescience (general)

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