Manufacturing Al/steel multilayered composite by accumulative roll bonding and the effects of subsequent annealing on the microstructural and mechanical characteristics

2014 ◽  
Vol 590 ◽  
pp. 186-193 ◽  
Author(s):  
Milad Talebian ◽  
Mostafa Alizadeh
Keyword(s):  
Accumulative Roll Bonding ◽  
Mechanical Characteristics ◽  
Subsequent Annealing ◽  
Roll Bonding ◽  
Multilayered Composite

scholarly journals An Experimental Study of Fracture Toughness for Nano/Ultrafine Grained Al5052/Cu Multilayered Composite Processed by Accumulative Roll Bonding

2018 ◽  
Vol 140 (10) ◽  
Author(s):  
D. Rahmatabadi ◽  
B. Mohammadi ◽  
R. Hashemi ◽  
T. Shojaee
Keyword(s):  
Fracture Toughness ◽  
Stress Fracture ◽  
Plane Stress ◽  
Accumulative Roll Bonding ◽  
Uniaxial Tensile ◽  
Roll Bonding ◽  
Multilayered Composite ◽  
Maximum Value ◽  
Ultrafine Grained ◽  
Pure Cu

In this study, ultrafine grained Al5052/Cu multilayered composite has been produced by accumulative roll bonding (ARB) and fracture properties have been studied using plane stress fracture toughness. The fracture toughness has been investigated for the unprocessed specimens, primary sandwich and first, second, and third cycles of ARB process by ASTM E561 and compact tension (CT) specimens. Also, the microstructure and mechanical properties have been investigated using optical microscopy, scanning electron microscopy, uniaxial tensile tests, and microhardness measurements. The value of plane stress fracture toughness for the ultrafine grained Al5052/Cu composite increased by increasing the number of ARB cycles, continuously from the primary sandwich to end of the third cycle. The maximum value of 59.1 MPa m1/2 has been obtained that it is about 2.77 and 4.05 more than Al5052 and pure Cu (unprocessed specimens). This phenomenon indicated that ARB process and the addition of copper to aluminum alloy could increase the value of fracture toughness to more than three times. The results showed that by increasing the ARB cycles, the thickness of copper layers reduced and after the fifth cycle, the excellent uniformity of Cu layers achieved. By increasing the number of ARB cycles, the microhardness of both aluminum and copper layers have been significantly increased. The tensile strength of the sandwich has been enhanced continually, and the maximum value of 566.5 MPa has been achieved.

scholarly journals Microstructure and Mechanical Properties of Ultrafine-Grained Copper by Accumulative Roll Bonding and Subsequent Annealing

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5171
Author(s):  
Xueran Liu ◽  
Limin Zhuang ◽  
Yonghao Zhao
Keyword(s):  
Tensile Strength ◽  
Strain Hardening ◽  
Accumulative Roll Bonding ◽  
Shear Zones ◽  
Subsequent Annealing ◽  
Scale Production ◽  
Copper Sheet ◽  
Roll Bonding ◽  
Ultrafine Grained ◽  
Cumulative Strain

Recently, the accumulative roll bonding (ARB) technique has made significant progress in the production of various ultrafine-grained (UFG) metals and alloys. In this work, a UFG copper sheet was produced by ARB and subsequent annealing at 300 °C for 60 min to optimize strength and ductility. It was found that homogeneous lamellar UFG materials with a thickness of 200–300 nm were formed after six ARB passes. The microhardness and tensile strength of as-ARBed Cu increased, while the ductility and strain hardening decreased with the cumulative deformation strain. The as-ARBed specimens fractured in a macroscopically brittle and microscopically ductile way. After annealing, discontinuous recrystallization occurred in the neighboring interface with high strain energy, which was prior to that in the matrix. The recrystallization rate was enhanced by increasing the cumulative strain. UFG Cu ARBed for six passes after annealing manifested a completely recrystallized microstructure with grain sizes approximately ranging from 5 to 10 μm. Annealing treatment reduced the microhardness and tensile strength but improved the ductility and strain hardening of UFG Cu. As-annealed UFG-Cu fractured in a ductile mode with dominant dimples and shear zones. Our work advances the industrial-scale production of UFG Cu by exploring a simple and low-cost fabrication technique.

scholarly journals Manufacturing of high-strength multilayered composite by accumulative roll bonding

2020 ◽  
Vol 6 (12) ◽  
pp. 1265e6 ◽  
Author(s):  
M Tayyebi ◽  
D Rahmatabadi ◽  
M Adhami ◽  
R Hashemi
Keyword(s):  
Accumulative Roll Bonding ◽  
High Strength ◽  
Roll Bonding ◽  
Multilayered Composite

Interface and Damping Capacity of Mg/Al Multilayered Composite Produced by Accumulative Roll Bonding

2016 ◽  
Vol 849 ◽  
pp. 838-843 ◽  
Author(s):  
Zhong Ming Liu ◽  
Hong Mei Chen ◽  
Wei Peng Guo ◽  
Jing Zhang ◽  
Yun Xue Jin
Keyword(s):  
Accumulative Roll Bonding ◽  
Room Temperature ◽  
Peak Height ◽  
Mg Alloy ◽  
Damping Capacity ◽  
Al Alloy ◽  
Roll Bonding ◽  
Multilayered Composite ◽  
Diffusion Layers ◽  
Multilayered Composites

Mg/Al alloy multilayered composites were produced by accumulative roll bonding (ARB) technique. The microstructures of Al and Mg alloy layers were characterized by scanning electron microscopy, and damping capacity of the composite was tested by dynamic mechanical analyzer.It can be found that the diffusion layers were produced in Al and Mg alloy layers, and the diffusion layers increased with increasing of the ARB pass. With the increasing of ARB pass, the room temperature damping value of Mg/A1 multilayered composite presented a downward trend. The temperature damping spectrum of the composite had two internal friction peaks, with the increasing of the ARB pass, the peak height of P1 peak increased gradually and P2 peak moved to low temperature gradually.

scholarly journals Effect of Asymmetric Accumulative Roll-Bonding process on the Microstructure and Strength Evolution of the AA1050/AZ31/AA1050 Multilayered Composite Materials

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5401
Author(s):  
Sebastian Mroz ◽  
Arkadiusz Wierzba ◽  
Andrzej Stefanik ◽  
Piotr Szota
Keyword(s):  
Composite Materials ◽  
Rotational Speed ◽  
Accumulative Roll Bonding ◽  
Shear Bands ◽  
Layered Composite ◽  
Initial Thickness ◽  
Roll Bonding ◽  
Multilayered Composite ◽  
Al Composite ◽  
Strength Evolution

This paper aimed to propose the fabrication of light, Al/Mg/Al multilayered composite. Initially prepared three-layered feedstock was subjected to deformation during four rolling cycles (passes) using the conventional and modified accumulative roll bonding (ARB) processes at 400 °C, thanks to which 24-layered composite materials were produced. The modification of the ARB process was based on the application of the rotational speed asymmetry (asymmetric accumulative roll bonding, AARB). It was adopted that the initial thickness of the composite stack amounted to 3 mm (1 mm for each composite). The rolling was done in the laboratory duo D150 rolling mill with the application of the roll rotational speed asymmetry and symmetry av = 1.0 (ARB) and av = 1.25 and 1.5 (AARB). In this manuscript, it was proved that introducing the asymmetry into the ARB process for the tested Al/Mg/Al composite has an impact on the activation of additional shear bands, which results in higher fragmentation of the structure in comparison to the symmetrical process. Due to the application of the AARB, the reduction of the grain size by 17% was obtained, in comparison to the conventional ARB. Not to mention that at the same time there was an increase in strength of the fabricated multilayered composite.

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