The influence of the thermomechanical processing and forming parameters on superplastic behaviour of the 7475 aluminium alloy

Smolej, A.; Gnamuš, M.; Slaček, E.

doi:10.1016/s0924-0136(01)00906-2

Cited by 29 publications

(14 citation statements)

References 18 publications

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“…The need for high strength coupled with good fracture toughness and SCC resistance led to the development of the 7475 alloy [11]. This progress resulted from a considerable reduction in the levels of iron, silicon, and manganese, but also from improvements in thermo-mechanical and heat treatment practices [1,12].…”

Section: Introductionmentioning

confidence: 99%

Statistical modeling of fatigue crack growth rate in pre-strained 7475-T7351 aluminum alloy

Al-Rubaie

Barroso

Godefroid

2008

Materials Science and Engineering: A

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Section: Introductionmentioning

confidence: 99%

Statistical modeling of fatigue crack growth rate in pre-strained 7475-T7351 aluminum alloy

Al-Rubaie

Barroso

Godefroid

2008

Materials Science and Engineering: A

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“…erefore, thermal-mechanical processing (TMP) [41][42][43], which is mainly based on the principles of static recrystallisation [44][45][46][47] and dynamic recrystallisation [48,49], is also an important way to develop superplasticity of Al alloys.…”

Section: Superplastic Formability Of Almentioning

confidence: 99%

A Review on Superplastic Formation Behavior of Al Alloys

Wang

et al. 2018

Advances in Materials Science and Engineering

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Superplastic formation technology is considered to be an effective and promising method to conquer formation difficulties of Al alloys, especially thin-walled or complex structure. In this paper, fundamentals of superplastic deformation of Al alloys are summarized and the superplastic deformation behaviors of main kinds of Al alloys are summarized and compared, including Al-Mg alloys, Al-Li alloys, and Al-Zn-Mg alloys as well as aluminum matrix composites. Then, the superplastic deformation mechanism for different Al alloys is thoroughly discussed. Last but not the least, the factors affecting the superplastic deformation process are fully analyzed.

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“…Forming at elevated temperatures overcomes the above limitations and achieves the part consolidation [4]. A variety of processes under either warm or hot conditions have been proposed, such as warm forming [5], hot forming [6] and superplastic forming [7]. Unlike the elastic-plastic dominated cold stamping process, typical characteristics for elevated temperature forming are: (1) microstructure evolution is complex with the coupled effects of dislocation, recovery and dynamic recrystallization in some particular conditions on the hot flow and post proper-ties [8]; (2) strain rate sensitive viscoplastic deformation becomes dominant [9].…”

Section: Introductionmentioning

confidence: 99%

A Physical-Based Plane Stress Constitutive Model for High Strength AA7075 under Hot Forming Conditions

Chen

et al. 2021

Metals

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Physicallybased constitutive equations are increasingly used for finite element simulations of metal forming processes due to the robust capability of modelling of underlying microstructure evolutions. However, one of thelimitations of current models is the lack of practical validation using real microstructure data due to the difficulties in achieving statistically meaningful data at a sufficiently large microstructure scale. Particularly, dislocation density and grain size governing the hardening in sheet deformation are of vital importance and need to be precisely quantified. In this paper, a set of dislocation mechanics-based plane stress material model is constructed for hot forming aluminum alloy. This material model is applied to high strength 7075 aluminum alloy for the prediction of the flow behaviorsconditioned at 300–400°C with various strain rates. Additionally, an electron backscatter diffraction (EBSD) technique was applied to examine the average grain size and geometrical necessary dislocation (GND) density evolutions, enabling both macro- and micro- characteristics to be successfully predicted. In addition, to simulate the experienced plane stress states in sheet metal forming, the calibrated model is further extended to a plane stress stateto accuratelypredict the forming limits under hot conditions.The comprehensively calibrated material model could be used for guidinga better selection of industrial processing parameters and designing process windows, taking into account both the formed shape as well as post formed microstructure and, hence, properties.

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The influence of the thermomechanical processing and forming parameters on superplastic behaviour of the 7475 aluminium alloy

Cited by 29 publications

References 18 publications

Statistical modeling of fatigue crack growth rate in pre-strained 7475-T7351 aluminum alloy

Statistical modeling of fatigue crack growth rate in pre-strained 7475-T7351 aluminum alloy

A Review on Superplastic Formation Behavior of Al Alloys

A Physical-Based Plane Stress Constitutive Model for High Strength AA7075 under Hot Forming Conditions

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