Gradient alternating deformation mechanism of two metals and interface bonding mechanism of cu/Al cold rolling composite process

Zou, Jinchao; Gao, Xiangyu; Wang, Dong; Jiang, Lianyun; Huang, Zhiquan; Wang, Tao

doi:10.1016/j.matchar.2023.112989

Cited by 9 publications

(5 citation statements)

References 39 publications

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“…In the case of E-H emulsion-lubricated rolled parts (Figure h and Figure h), a highly stressed deformation structure is formed by the interfacial structure, and therefore interfacial normal stresses and frictional shear are present at the interface, leading to an increase in residual stresses. The synergistic effect of rolling loads and interfacial shear promotes grain rotation and refinement near the interface . In addition, highly deformed E-H emulsion-lubricated rolled parts have high levels of stacked faults and the dislocations are prone to misalignment.…”

Section: Discussionmentioning

confidence: 99%

“…Dislocation interfaces are continuously formed. In turn, the continuous division of the grains gradually refines the grains …”

Section: Discussionmentioning

confidence: 99%

“…The synergistic effect of rolling loads and interfacial shear promotes grain rotation and refinement near the interface. 66 In addition, highly deformed E-H emulsionlubricated rolled parts have high levels of stacked faults and the dislocations are prone to misalignment. Dislocation interfaces are continuously formed.…”

Section: Microstructural Evolutionmentioning

confidence: 99%

“…In turn, the continuous division of the grains gradually refines the grains. 66 Furthermore, dynamic recrystallization corresponds to a critical dislocation density. 21,49 Once the critical density is reached (depending on the strain rate and the chemical composition of the steel), dynamic recrystallization is initiated by the bulging of pre-existing grain boundaries at low strain rates.…”

Section: Microstructural Evolutionmentioning

confidence: 99%

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Microstructural Evolution of Emulsion-Lubricated Cold-Rolled Steel Interface

Wang,

Wan,

et al. 2024

ACS Appl. Eng. Mater.

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The complex interaction between emulsion lubrication, heavy-load rolling, interfacial friction, and interfacial microstructural evolution is an urgent scientific problem that needs to be explored for emulsion-lubricated rolling. In this study, the evolution of the surface and interface microstructures of AISI-1045 steel subjected to two types of emulsion lubrication rolling is investigated. The influence of the differences between the properties of the emulsions (wettability, homogeneity, and tribological properties) on the surface and interface of the rolled material is analyzed. The results show that the differences between the emulsion properties produce different rolling forces and surface qualities. The rolling force and surface roughness of E-H (Emulsion H) having poor emulsion properties increase by 9.3% and 83.3%, respectively, compared with those of E-L (Emulsion L) having superior properties. The excessive rolling force exerted when applying E-H-emulsion-lubricated rolling results in a gradient distribution structure of the material surface: a layer of fine grains, layer of finely deformed grains, and layer of large grains with a small amount of deformation. Many defects (stacking dislocations, dislocation unit structures, and twinning boundaries) are distributed in the fine-grained and finely deformed-grain layers. The dense distribution of dislocations in the crystals leads to further rotation of the texture toward the Brass{011}⟨211⟩ and S3{123}⟨634⟩ texture components. Consequently, the variability in the emulsion properties significantly affects the surface and interfacial structural composition of the rolled material. Thus, material properties are affected. This study provides methods for optimizing the cold-rolling lubrication process.

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Section: Discussionmentioning

confidence: 99%

“…Dislocation interfaces are continuously formed. In turn, the continuous division of the grains gradually refines the grains …”

Section: Discussionmentioning

confidence: 99%

Section: Microstructural Evolutionmentioning

confidence: 99%

Section: Microstructural Evolutionmentioning

confidence: 99%

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Microstructural Evolution of Emulsion-Lubricated Cold-Rolled Steel Interface

Wang,

Wan,

et al. 2024

ACS Appl. Eng. Mater.

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“…Finite element (FE) simulation was carried out to calculate the deformation behaviors of SS and Cu in the second-pass rolling. In order to prevent excessive complications and to reduce the calculation time, the roll process was conducted in 2D Dynamic/Explicit due to its considered to be a plane strain problem [23] and the sheet length was reduced to 6 mm (the complete rolling process was guaranteed without affecting the calculation results). The meshing diagram of the nite element model is shown in Fig.…”

Section: Numerical Simulation Methodsmentioning

confidence: 99%

Research on fabricating Cu/stainless steel composite thin strips by two-pass cold roll-bonding with intermediate annealing

Niu,

Ding,

Zhang

et al. 2023

Int J Adv Manuf Technol

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Roll-bonding is feasible to fabricate T2 copper (Cu)/ Stainless steel (SS) composite thin trips, which have great potential in micromanufacturing, robotics, aerospace, and other applications. However, the effective bonding of Cu and SS could be hindered by limited diffusion of the elements and uncoordinated deformation of the metal matrices. In this study, Cu/SS composite strips with 0.24mm thickness were prepared by the twopass cold rolling process with intermediate annealing at 400 ~ 1000℃. The in uences of the intermediate annealing process on the tensile and peeling strength were investigated. Finite element simulation and microstructure evaluation were carried out to analyze the deformation behaviors and bonding mechanisms of the strips. The results indicate that the deformation coordination in the second-pass rolling and the bonding strength were improved by appropriate intermediate annealing processes. The difference in the deformation resistance between Cu and SS became the lowest by intermediate annealing at 1000℃, while the deformation of Cu and SS was severely uncoordinated by annealing at 600℃. The peel strength and elongation of the strips annealed at 1000℃ were 11.65 ± 0.7N/mm and 34.8 ± 1.3% after the second-pass rolling, which were 79.23% and 6.64 times higher than the strips manufactured without intermediate annealing, respectively. In this work, Cu/SS thin strips with high bond strength and ductility were successfully manufactured by appropriate intermediate annealing process, and the bonding mechanisms were systematically discussed.Highlights les.docx

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