Plastic instability criterion based on new necking parameters for Cu–Al, Cu–A5052, and Cu–A5083 roll-bonded laminated metal composites fabricated without post-annealing

Miyajima, Yoji; Yamada, Takuya; Fujii, Toshiyuki

doi:10.1016/j.jmatprotec.2022.117634

Cited by 9 publications

(7 citation statements)

References 41 publications

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“…which can easily lead to plastic instability of the hard layer [28]. However, in this study, the AA6061 layer did not fracture under large deformation, and the overall lamellar structure was relatively stable.…”

Section: Microstructure Analysis Of Aa1050/aa6061 Laminated Compositesmentioning

confidence: 55%

“…However, as the rolling deformation continued, the local necking phenomenon occurred in the hard layer (AA6061 layer) of the laminated composites after RTR and CR, and some lamellar structures exhibited curved morphologies (as shown in Figure 6c,d). According to the literature research, due to the differences in mechanical properties of each component metal, it is difficult for LMCs to coordinate deformation during rolling, which can easily lead to plastic instability of the hard layer [28]. However, in this study, the AA6061 layer did not fracture under large deformation, and the overall lamellar structure was relatively stable.…”

Section: Microstructure Analysis Of Aa1050/aa6061 Laminated Compositesmentioning

confidence: 63%

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Microstructure and Mechanical Properties of AA1050/AA6061 Laminated Composites Fabricated through Three-Cycle Accumulative Roll Bonding and Subsequent Cryorolling

Song,

Gao,

Wang

et al. 2024

Materials

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In this study, AA1050/AA6061 laminated composites were prepared by three-cycle accumulative roll bonding (ARB) and subsequent rolling. The effects of the rolling process on the microstructure evolution and mechanical properties of AA1050/AA6061 laminated composites were systematically investigated. The results indicate that the mechanical properties of the laminated composites can be effectively improved by cryorolling compared with room-temperature rolling. The microstructure analysis reveals that cryorolling can suppress the necking of the hard layer to obtain a flat lamellar structure. Moreover, the microstructure characterized by transmission electron microscopy shows that cryorolling can inhibit the dynamic recovery and significantly refine the grain size of the constituent layers. Meanwhile, the tensile fracture surface illustrates that AA1050/AA6061 laminated composites have the optimal interfacial bonding quality after cryorolling. Therefore, the laminated composites obtain excellent mechanical properties with the contribution of these factors.

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Section: Microstructure Analysis Of Aa1050/aa6061 Laminated Compositesmentioning

confidence: 55%

Section: Microstructure Analysis Of Aa1050/aa6061 Laminated Compositesmentioning

confidence: 63%

Microstructure and Mechanical Properties of AA1050/AA6061 Laminated Composites Fabricated through Three-Cycle Accumulative Roll Bonding and Subsequent Cryorolling

Song,

Gao,

Wang

et al. 2024

Materials

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“…Moreover, the plastic instability criterion was validated in terms of critical force, section bending moment, normal stress and plastic instability dangerous ring section; this confirms the reliability of the criterion. Miyajima et al [ 175 ] studied the necking phenomenon of layered metal composites prepared by Accumulative Roll Bonding (ARB), and established a mathematical model for quantitative evaluation and the prediction of instability based on the necking of work-hardened layered metal composites. ( Table 5 , Equation (35)).…”

Section: Analytical Methods Of Deformation Instabilitymentioning

confidence: 99%

Theory, Method and Practice of Metal Deformation Instability: A Review

Wan

Yao

et al. 2023

Materials

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Deformation instability is a macroscopic and microscopic phenomenon of non-uniformity and unstable deformation of materials under stress loading conditions, and it is affected by the intrinsic characteristics of materials, the structural geometry of materials, stress state and environmental conditions. Whether deformation instability is positive and constructive or negative and destructive, it objectively affects daily life at all times and the deformation instability based on metal-bearing analysis in engineering design has always been the focus of attention. Currently, the literature on deformation instability in review papers mainly focuses on the theoretical analysis of deformation instability (instability criteria). However, there are a limited number of papers that comprehensively classify and review the subject from the perspectives of material characteristic response, geometric structure response, analysis method and engineering application. Therefore, this paper aims to provide a comprehensive review of the existing literature on metal deformation instability, covering its fundamental principles, analytical methods, and engineering practices. The phenomenon and definition of deformation instability, the principle and viewpoint of deformation instability, the theoretical analysis, experimental research and simulation calculation of deformation instability, and the engineering application and prospect of deformation instability are described. This will provide a reference for metal bearing analysis and deformation instability design according to material deformation instability, structural deformation instability and localization conditions of deformation instability, etc. From the perspective of practical engineering applications, regarding the key problems in researching deformation instability, using reverse thinking to deduce and analyze the characteristics of deformation instability is the main trend of future research.

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“…1(a). 23) The coordinate system of a sample is defined by the rolling direction (RD), transverse direction (TD), and normal direction (ND). Planes with normal direction parallel to the RD, TD, and ND are denoted as the RD, TD, and ND planes, respectively.…”

Section: Sample Preparationmentioning

confidence: 99%

“…DMLs are thought to be a model material for studying kink deformation. Recently, criteria for obtaining a satisfactory layered structure using the ARB process were proposed, 23) and they are applicable to fabricating Cu/A5052 DMLs with the MFS. In this study, therefore, Cu/A5052 DMLs were fabricated by the ARB process as the model material with the MFS, and then, the kink formation was investigated through compression tests at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Effects of a Preannealing Process on the Morphology of Developed Kinks in Mille-Feuille Structured Cu/A5052 Alloy Fabricated by Accumulative Roll Bonding: Criteria for Kink Formation

et al. 2023

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Cu/A5052 dissimilar metal laminates (DMLs) were fabricated by an accumulative roll bonding process. The Cu/A5052 DML consisted of hard and soft layers, in other words, high and low shear modulus layers, which is called a mille-feuille structure (MFS). The Cu/A5052 DML with the MFS showed kink deformation during monotonic compression. Kink formation was analyzed by in-situ optical microscopy and digital image correlation. The development behavior and morphology of the ortho-type kink depended on the annealing conditions prior to the compression tests. Based on the observations and measurements, criteria for kink formation in the DML with the MFS were proposed.

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Plastic instability criterion based on new necking parameters for Cu–Al, Cu–A5052, and Cu–A5083 roll-bonded laminated metal composites fabricated without post-annealing

Cited by 9 publications

References 41 publications

Microstructure and Mechanical Properties of AA1050/AA6061 Laminated Composites Fabricated through Three-Cycle Accumulative Roll Bonding and Subsequent Cryorolling

Microstructure and Mechanical Properties of AA1050/AA6061 Laminated Composites Fabricated through Three-Cycle Accumulative Roll Bonding and Subsequent Cryorolling

Theory, Method and Practice of Metal Deformation Instability: A Review

Effects of a Preannealing Process on the Morphology of Developed Kinks in Mille-Feuille Structured Cu/A5052 Alloy Fabricated by Accumulative Roll Bonding: Criteria for Kink Formation

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