Microconstituent-Induced Pitting Corrosion in Aluminum Alloy 2024-T3

CORROSION ◽  
1996 ◽  
Vol 52 (1) ◽  
pp. 8-15 ◽  
Author(s):  
G. S. Chen ◽  
M. Gao ◽  
R. P. Wei
Keyword(s):  
Aluminum Alloy ◽  
Pitting Corrosion ◽  
Aluminum Alloy 2024

In-Situ Monitoring of Pitting Corrosion in Aluminum Alloy 2024

CORROSION ◽  
1998 ◽  
Vol 54 (6) ◽  
pp. 451-458 ◽  
Author(s):  
C.-M. Liao ◽  
J. M. Olive ◽  
M. Gao ◽  
R. P. Wei
Keyword(s):  
Aluminum Alloy ◽  
Pitting Corrosion ◽  
In Situ Monitoring ◽  
Aluminum Alloy 2024

An Experimental Investigation of the Yield Loci of 1100-0 Aluminum, 70:30 Brass, and an Overaged 2024 Aluminum Alloy After Various Prestrains

1986 ◽  
Vol 108 (4) ◽  
pp. 313-320 ◽  
Author(s):  
D. E. Helling ◽  
A. K. Miller ◽  
M. G. Stout
Keyword(s):  
Aluminum Alloy ◽  
Small Strain ◽  
Yield Locus ◽  
Material Behavior ◽  
Shear Stresses ◽  
2024 Aluminum Alloy ◽  
Yield Loci ◽  
Aluminum Alloy 2024 ◽  
Von Mises ◽  
Normal And Shear Stresses

The multiaxial yield behaviors of 1100-0 aluminum, 70:30 brass, and an overaged 2024 aluminum alloy (2024-T7) have been investigated for a variety of prestress histories involving combinations of normal and shear stresses. Von Mises effective prestrains were in the range of 1.2–32%. Prestress paths were chosen in order to investigate the roles of prestress and prestrain direction on the nature of small-strain offset (ε = 5 × 10−6) yield loci. Particular attention was paid to the directionality, i.e., translation and distortion, of the yield locus. A key result, which was observed in all three materials, was that the final direction of the prestrain path strongly influences the distortions of the yield loci. Differences in the yield locus behavior of the three materials were also observed: brass and the 2024-T7 alloy showed more severe distortions of the yield locus and a longer memory of their entire prestrain history than the 1100-0 aluminum. In addition, more “kinematic” translation of the subsequent yield loci was observed in brass and 2024-T7 than in 1100-0 aluminum. The 2024-T7 differed from the other materials, showing a yield locus which decreased in size subsequent to plastic straining. Finally, the implications of these observations for the constitutive modeling of multiaxial material behavior are discussed.

scholarly journals A DIC-Based Study on Fatigue Damage Evolution in Pre-Corroded Aluminum Alloy 2024-T4

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2243 ◽  
Author(s):  
Haipeng Song ◽  
Changchun Liu ◽  
Hao Zhang ◽  
Sean Leen
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Crack ◽  
Crack Initiation ◽  
Fatigue Damage ◽  
Damage Evolution ◽  
Image Correlation ◽  
Multiple Cracks ◽  
Mixed Mode Fracture ◽  
Corrosion Condition ◽  
Aluminum Alloy 2024

This paper investigates the fatigue damage and cracking behavior of aluminum alloy 2024-T4 with different levels of prior corrosion. Damage evolution, crack initiation and propagation were experimentally analyzed by digital image correlation, scanning electron microscopy and damage curves. Prior corrosion is shown to cause accelerated damage accumulation, inducing premature fatigue crack initiation, and affecting crack nucleation location, crack orientation and fracture path. For the pre-corrosion condition, although multiple cracks were observed, only one corrosion-initiated primary crack dominates the failure process, in contrast to the plain fatigue cases, where multiple cracks propagated simultaneously leading to final coalescence and fracture. Based on the experimental observations, a mixed-mode fracture model is proposed and shown to successfully predict fatigue crack growth and failure from the single dominant localized corrosion region.

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