Fatigue Crack Initiation and Growth Behavior of 7475 Aluminium Alloy in Air and Aggressive Environment

B.B. Verma; M. Mallik; J.D. Atkinson; P.K. Ray

doi:10.4028/www.scientific.net/AMR.428.133

Paper Titles

Determination of Reasonable Scope of Self-Stress for Concrete Filled Steel Tubular Arch Bridge
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Numerical Analysis of a Crack Emanating from Semicircular Notch with Connection to a Pre-Existing Crack
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FE Analysis of Sif of Interfacial Crack Emanating from a Circular Notch in Ceramic/Metal Bi-Materials
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The Effects of Milling Methods on Doped LaCrO₃ Nanopowder Prepared by Glycine Nitrate Process on Particle Size and Phase Transformation
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Fatigue Crack Initiation and Growth Behavior of 7475 Aluminium Alloy in Air and Aggressive Environment
p.133

Adaptive Slicing for Fused Deposition Modeling and Practical Implementation Schemes
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Estimation of Thickness Ratio of Bi-Layer TiNi to Enhance Shape Memory Behavior
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Study on the Influence of Process Parameters on the Distribution of Macro-Particles on the Surface of Films
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Characterization of Photoelectric Properties of ZnO by I-V Measurement
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Fatigue Crack Initiation and Growth Behavior of 7475 Aluminium Alloy in Air and Aggressive Environment

Abstract:

Present investigation is devoted to study the effects of aqueous solution of 3.5% NaCl on high-cycle stress life and fatigue crack growth behavior of 7475-T7351 alloy. At low alternating stress the environment test exhibited corrosion pit dominated crack initiation and at high stress level crack initiation occurred through anodic dissolution. Corrosive environment resulted reduction in fatigue life, crack growth rate enhancement and drop in stage-I to stage-II transition. The behavior is explained with the help of fractographic observations.