Micromechanical simulations of additively manufactured aluminum alloys

Романова, В. А.; Балохонов, Р. Р.; Zinovieva, O.; Emelianova, Е.; Dymnich, E.; Pisarev, M.; Zinoviev, Aleksandr

doi:10.1016/j.compstruc.2020.106412

Cited by 26 publications

(14 citation statements)

References 36 publications

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“…The governing Equations ( 1)-( 3) and boundary conditions ( 5)-( 7) are formulated with respect to the sample frame, while the constitutive Equations ( 8)-( 12) are written relative to the crystal frame associated with [100], [010], and [001] crystal directions [26,49]. The advantage of numerical implementation in ABAQUS/Explicit is that the tensor and vector components are automatically rotated from the global to the local coordinate system before they are imported to VUMAT and vice versa after the constitutive behavior is calculated.…”

Section: Numerical Implementationmentioning

confidence: 99%

“…), interface asperities, microstructural inhomogeneity, nonuniform loading conditions, and so on. The instability of plastic flow in CPFEM simulations has been thoroughly discussed by many researchers [10,20,26,39,53,54]. Let us analyze plastic strain patterns in the crystals loaded along the [001] axis (Figure 4).…”

Section: Perfect Plasticitymentioning

confidence: 99%

“…To a large extent, the renewed interest in this kind of research is kindled by the development of advanced manufacturing techniques producing metallic and/or composite components characterized by a complex hierarchical microstructure. For instance, additively manufactured aluminum alloys are characterized by much more pronounced structural inhomogeneity and anisotropy of the physical and mechanical properties than the traditional cast alloys of the same composition [25,26]. Friction stir welding creates different microstructural zones in a processed material, including a quasi-uniform distribution of grains in the base metal and a complex texture in the weld nugget and in the adjacent regions with characteristic interfaces between intermixing zones [27,28].…”

Section: Introductionmentioning

confidence: 99%

“…ε eq is the local equivalent strain rate and k = 0.8 [26,49]. Keeping in mind that the strain rate in the strain localization regions can deviate from the average value by several orders of magnitude, the equation for .…”

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confidence: 99%

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Mechanical Aspects of Nonhomogeneous Deformation of Aluminum Single Crystals under Compression along [100] and [110] Directions

Романова

Балохонов

Zinovieva

et al. 2022

Metals

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The deformation behavior of aluminum single crystals subjected to compression along the [100] and [110] directions is numerically examined in terms of crystal plasticity. A constitutive model taking into account slip geometry in face-centered cubic crystals is developed using experimental data for the single-crystal samples with lateral sides coplanar to certain crystal planes. Two sets of calculations are performed using ABAQUS/Explicit to examine the features of plastic strain evolution in perfectly plastic and strain-hardened crystals. Special attention is given to the discussion of mechanical aspects of crystal fragmentation. Several distinct deformation stages are revealed in the calculations. In the first stage, narrow solitary fronts of plastic deformation are alternately formed near the top or bottom surfaces and then propagate towards opposite ends to save the symmetry of the crystal shape. The strain rate within the fronts is an order of magnitude higher than the average strain rate. The first stage lasts longer in the strain-hardened crystals, eventually giving way to an intermediate stage of multiple slips in different crystal parts. Finally, the crystal shape becomes asymmetrical, but no pronounced macroscopic strain localization has been revealed at any deformation stage. The second stage in perfectly plastic crystals relates to abrupt strain localization within a through-thickness band-shaped region, accompanied by macroscale crystal fragmentation. Stress analysis has shown that pure compression took place only in the first deformation stage. Once the crystal shape has lost its symmetry, the compressive stress in some regions progressively decreases to zero and eventually turns tensile.

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Section: Numerical Implementationmentioning

confidence: 99%

Section: Perfect Plasticitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Mechanical Aspects of Nonhomogeneous Deformation of Aluminum Single Crystals under Compression along [100] and [110] Directions

Романова

Балохонов

Zinovieva

et al. 2022

Metals

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“…It also can be heat treated to precondition for aging and increase phase structure quality without precipitation and have very good wettability with reinforcement 33) . Aluminium alloy had been used in the manufacturing of aircraft components and automobile industry [34][35][36] . Because of the hardness of the material, it makes it hard to machine 37) .…”

Section: Micromilling Of Hard To Machine Materialsmentioning

confidence: 99%

Recent Study on Hard to Machine Material – Micromilling process

Rosli¹,

Jamaludin²,

Razali³

2021

Evergreen

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This paper presents an overview of the modern advancement of micromilling as pertained to the machining process from recent research and advancement perspective. The review starts by displaying the characteristics and micromilling contributions background, and later sets up the reader to difficult-to-cut materials. However, the fabricating process usually becomes complicated owing to these material's unique metallurgical properties. This paper brings to focus the micromilling of difficult-to-cut materials, especially materials that are currently the highlights of various industries. The discussion of research and attributes of difficult-to-cut materials are covered in further detail, which serves with opportunities for future developments.

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