Influence of pre-deformation and subsequent ageing on the hardening behavior and microstructure of 2219 aluminum alloy forgings

Wang, Huimin; Yi, Youping; Huang, Shiquan

doi:10.1016/j.jallcom.2016.06.111

Cited by 72 publications

(10 citation statements)

References 24 publications

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“…The effect was reversed for elongation: pre-deformation at 200 • C increased elongation, and at lower temperatures -reduced elongation. Wang et al (2016) described results of investigations on the effect of preliminary compressive strains (3% and 5%) during aging of alloy 2219 at a temperature of 175 • C on its mechanical properties. A significant increase of both the yield point and tensile strength was obtained relative to the material subjected only to thermal aging.…”

Section: Introductionmentioning

confidence: 99%

Monotonic behaviour of typical Al-Cu-Mg alloy pre-strained at elevated temperature

Tomczyk

Seweryn

Doroszko

2018

jtam

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This paper presents results of monotonic tensile and creep tests conducted on typical Al-Cu-Mg alloy (commercial 2024) specimens. Tensile tests carried out at room (20 • C) and elevated (100 • C, 200 • C, 300 • C) temperatures made it possible to determine strength properties of the material (Young's modulus, yield stress, ultimate tensile strength). Creep tests were performed at elevated temperature (100 • C, 200 • C and 300 • C) with a constant force. In order to obtain material creep characteristics, creep-rupture tests were carried out. Then creep tests were conducted with two different strain values: one corresponding to the beginning of the secondary creep and the other corresponding to a certain value of the tertiary creep. After preliminary creep deformation at two various strain levels, specimens were cooled at ambient temperature and then subjected to monotonic tensile tests. The characteristics of the material were obtained for pre-strained specimens at different temperatures. Specimens fracture surfaces obtained as a result of tensile (at elevated and room temperature), creep and combined tests were analyzed.

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Section: Introductionmentioning

confidence: 99%

Monotonic behaviour of typical Al-Cu-Mg alloy pre-strained at elevated temperature

Tomczyk

Seweryn

Doroszko

2018

jtam

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“…Aging treatments is one of the most important methods to improve plasticity and toughness of Al-Li alloys [14], which include single and multi-stage artificial aging and pre-deformation+artificial aging. Comparing with single or multi-stage aging, the combination of pre-deformation plus artificial aging increases the dislocation density and promotes nonuniform nucleation of the strengthening phase, which significantly improves the mechanical properties of the alloys [15][16][17]. However, investigations on the relationships among the pre-deformation, precipitation, and mechanical properties are limited.…”

Section: Introductionmentioning

confidence: 99%

Effect of pre-deformation and artificial aging on fatigue life of 2198 Al-Li alloy

Zhang

Liang

et al. 2020

Mater. Res. Express

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The effects of pre-deformation and artificial aging on fatigue life of 2198 Al-Li alloy were explored to further reveal its fatigue behavior and improve the damage tolerance. Fatigue life was investigated on 2198-T3 alloy after pre-deformation and aging treatments. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to study the fracture morphology, precipitation behavior, fatigue crack initiation and propagation. Results indicated that T 1 (Al 2 CuLi) phase dominated the strengthening of 2198-T3 alloy after the further aging. Pre-deformation increased the number of dislocations in the matrix, which provided favorable position for nucleation of T 1 . The precipitation of θ′ (Al 2 Cu) and δ′ (Al 3 Li) were inhibited. Also, the formation and coarsening of precipitate-free zone (PFZ) were effectively avoided in this condition. Dislocation density in the 2198 Al-Li alloy matrix increased with the amount of pre-deformation, leading to an increase in microcrack defects on the surface and inside alloy. As a result, decreased fatigue life and an increased crack growth rate of the alloy were observed. Overall, 2198 Al-Li alloy had the best fatigue life and damage tolerance enhancement after it underwent 3% pre-deformation and was aged at 155°C for 15 h.

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“…The aluminum alloy (AA2219) has good high/lowtemperature mechanical properties, good fracture toughness, good stress corrosion resistance and weldability. It is the main structural material of propellant tank for space launch vehicles [1][2][3][4]. With a complicated structure, the rocket propellant tank is difficult to be formed at one time and its various sections are connected with tungsten inert gas (TIG) welding technology.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on the stress evolution of welding process in aluminium alloy 2219

Nie¹,

Wu²,

Gong³

2019

mech

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Influence of pre-deformation and subsequent ageing on the hardening behavior and microstructure of 2219 aluminum alloy forgings

Cited by 72 publications

References 24 publications

Monotonic behaviour of typical Al-Cu-Mg alloy pre-strained at elevated temperature

Monotonic behaviour of typical Al-Cu-Mg alloy pre-strained at elevated temperature

Effect of pre-deformation and artificial aging on fatigue life of 2198 Al-Li alloy

Numerical investigation on the stress evolution of welding process in aluminium alloy 2219

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