The structure and properties of splat-quenched aluminum alloy 2024 containing lithium additions

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.

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A study on pitting corrosion of aluminum alloy 2024-T3 by scanning microreference electrode technique

Materials Science and Engineering A ◽

10.1016/s0921-5093(02)00445-8 ◽

2003 ◽

Vol 344 (1-2) ◽

pp. 323-327 ◽

Cited By ~ 83

Author(s):

Minhua Shao ◽

Yan Fu ◽

Ronggang Hu ◽

Changjian Lin

Keyword(s):

Aluminum Alloy ◽

Pitting Corrosion ◽

Aluminum Alloy 2024 ◽

Electrode Technique

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Rapid determination of the Wöhler’s curve for aluminum alloy 2024-T3 by means of the thermographic method

10.1063/1.4965936 ◽

2016 ◽

Cited By ~ 2

Author(s):

Adam Lipski

Keyword(s):

Aluminum Alloy ◽

Rapid Determination ◽

Aluminum Alloy 2024

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Corrosion behavior of aluminum alloy 2024-T3 by 8-hydroxy-quinoline and its derivative in 3.5% chloride solution

Transactions of Nonferrous Metals Society of China ◽

10.1016/s1003-6326(07)60092-2 ◽

2007 ◽

Vol 17 (2) ◽

pp. 318-325 ◽

Cited By ~ 44

Author(s):

Song-mei LI ◽

Hong-rui ZHANG ◽

Jian-hua LIU

Keyword(s):

Aluminum Alloy ◽

Corrosion Behavior ◽

Chloride Solution ◽

Aluminum Alloy 2024 ◽

Hydroxy Quinoline

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

Materials ◽

10.3390/ma11112243 ◽

2018 ◽

Vol 11 (11) ◽

pp. 2243 ◽

Cited By ~ 1

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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