Effect of surface nitridingtreatment in a steel plate on the interfacial bonding strength of the aluminum/steel clad sheets by the cold roll bonding process

Wu, Bo; Li, Long; Xia, Chengdong; Guo, Xiaofeng; Zhou, Dejing

doi:10.1016/j.msea.2016.11.051

Cited by 25 publications

(8 citation statements)

References 26 publications

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“…Thus, ductility at R at = 35% was around 7%. 6. The defined correction factor was dependent on the dimensions and ductility of the micro tensile samples and the diameter of CCA wire.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, for samples with cross-section similar to that in figure 5, the modified slimness ratio (K c ) was proposed according to equation (5). Here, the cross-sectional area was obtained through equation (6). Moreover, similar to the Bertella-Oliver equation, the constant of the material (a) was calculated from equation (7).…”

Section: ( )mentioning

confidence: 99%

“…Metallic multilayer materials, also called multilayer composites [1,2], cladding materials [3], clad composites [4,5], clad plates [6,7], bimetal composites [8,9] , composite rods [10,11] and clad wires [12], have been widely used in many industrial fields such as kitchen utensils [6,[13][14][15], automobile industry [9,14,16,17], aerospace [6,18], shipbuilding [6], biomedical devices [19] and heat exchangers [9,14,16,17]. Various combinations of materials like Al/St [6,9,20], Al/Ti [7,18,21,22], Al/Mg [11], Al/Ag [23], Al/Cu/Al [4,5], Cu/Zn/Al [1], STS/ Al/Cu [13], Cu/Ti [8], Ti/Cu/Ti [24], Ni/Cu [16] and Cu/St [12,25] have been employed to exploit excellent mechanical, physical, and chemical properties of each material in a new unit material. Copper cl...…”

Section: Introductionmentioning

confidence: 99%

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An investigation on micro-hardness, micro-structure and ductility of clad layer in copper clad aluminum wire under multi stage–NCWD

Sichani

Rahnama

Raghebi

et al. 2020

Mater. Res. Express

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The copper clad aluminum (CCA) wire was fabricated by roll forming of copper foil around the aluminum wire rode. Non-continuous wire drawing (NCWD) was employed to study the effect of wire drawing parameters on ductility, micro-hardness and microstructure of the copper clad layer. The NCWD process continued without intermediate annealing until cracks were observed on the copper clad layer. The cracks appeared after a 78% reduction in the cross-section. The micro-tensile test was performed on specimens with transverse curvature to determine elongation. A modified correction factor was introduced to correct the effect of curvature size on elongation. The introduced correction factor proportional to the sample characteristics was between 0.7 and 1.4. Moreover, variations in the hardness and microstructure of the copper clad layer were investigated in the base metal and at the welding zone. Before beginning the wire drawing process for the annealed CCA wire with a diameter of 10.1mm and a Cu clad thickness of 0.48mm , the hardness, ductility, UTS and grain size of the clad layer were 87HV, 43%, 103MPa and 80 μm, respectively. At the end of NCWD for 10°a nd the 20% reduction ratio of the die, the diameter of CCA wire reached 4.7mm with a 0.22mm thickness of Cu clad. The hardness, ductility, UTS and grain size of the clad layer were 157HV, 2.9%, 325MPa and 8 μm, respectively.

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“…Thus, ductility at R at = 35% was around 7%. 6. The defined correction factor was dependent on the dimensions and ductility of the micro tensile samples and the diameter of CCA wire.…”

Section: Discussionmentioning

confidence: 99%

Section: ( )mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An investigation on micro-hardness, micro-structure and ductility of clad layer in copper clad aluminum wire under multi stage–NCWD

Sichani

Rahnama

Raghebi

et al. 2020

Mater. Res. Express

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show abstract

“…The strength of the mechanical locking force is directly related to the number and shape of cracks of the primary diffusion layer. The increasing of the crack number can enhance the mechanical locking force [13]. As the rolling pass number increases, the crack width of the IMC layer increased and the number of IMC particles per unit length decreased (Table 3).…”

Section: The Bonding Mechanism Of the Cu/al Clad Sheetsmentioning

confidence: 99%

Interfacial Characterization and Bonding Properties of Copper/Aluminum Clad Sheets Processed by Horizontal Twin-Roll Casting, Multi-Pass Rolling, and Annealing

Mao

Xie

Wang

et al. 2018

Metals

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Abstract:The copper/aluminum (Cu/Al) clad sheets were produced on a horizontal twin-roll caster and then were multi-pass rolled and annealed. The thickness of the as-cast clad sheet was 8 mm. Rolling was performed with total reductions of 12.5%, 25%, 37.5%, 50%, and 62.5%, separately. The effects of the rolling and annealing processes on the interface and peel strength of the Cu/Al clad sheets were investigated. The evolution of the interface and crack propagation were studied. The interface thickness of the as-cast clad sheet reached 9 µm to 10 µm. The average peel strength (APS) was only 9 N/mm. After multi-pass rolling, the peel strength first slightly increased and then gradually decreased with the increase of the rolling pass number. After annealing, the peel strength remarkably improved. The APS reached 25 N/mm when the rolled thickness was 7 mm. The improvement in the peel strength was due to the following three factors: (1) mechanical locking formed in the Cu/Al direct contact region after rolling, (2) the region of the Al matrix fracture, and (3) mechanical biting from the Cu/Al direct contact region.

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“…The results revealed that layers of intermetallics composed mainly of Fe 4 Al 13 , FeC, and Al 8 SiC 7 were formed and deteriorated the bond quality. Another study by Wu et al [23] used cold roll bonding to bond nitrided steel sheets with a 4A60 aluminum alloy. A brittle and hardened layer of Fe 3 N intermetallics with a thickness of 10 µm was formed at the interface.…”

Section: Introductionmentioning

confidence: 99%

Free Intermetallic Cladding Interface between Aluminum and Steel through Friction Stir Processing

et al. 2022

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In this paper, the cladding of pure aluminum and a low-carbon steel alloy was performed through friction stir processing with minimal intermetallic compound formation. A 3 mm thick aluminum plate was clamped on top of a steel plate. A thick, pure copper plate was used as a backing plate. The tool pin length was adjusted to be the same as the upper plate's thickness (3 mm) and longer than 3.2 mm. The effect of the tool pin length and the rotation speed (500–1500 rpm) on the cladding’s quality, microstructure, and the mechanical properties of the steel/aluminum interface were investigated using optical and scanning electron microscopy, a hardness test, and a peel test. The results showed that the bonding of pure aluminum and a low-carbon steel alloy can be successfully performed at a more than 500 rpm rotation speed. At a tool pin length of 3 mm and a rotation speed of 1000 rpm, sound and free-intermetallic compound–cladding interfaces were formed, while some Fel2Al5 intermetallics were formed when the rotation speed was increased to 1500 rpm. The pure copper backing plate has an essential role in eliminating or reducing the formation of intermetallic compounds in the cladding interface. When the tool pin length was increased to 3.2 mm, more steel fragments were found on the aluminum side. Moreover, with a higher rotation speed and longer tool pin length, more Fe2Al5 intermetallics were formed at the interface. Increasing the rotation speed and the pin tool length contributed to the enhancement of interface bonding. Meanwhile, the maximum tensile shear load was obtained at a rotation speed of 1500 rpm and a tool pin length of 3.2 mm. In addition, the hardness values of the interface were higher than the aluminum base metal for all the investigated samples. Decreasing the rotation speed and increasing the tool pin length can significantly increase hardness measurements. The average hardness increases from 42 HV of the pure aluminum to 143 HV at a rotation speed and a tool pin length of 1500 rpm and 3.2, respectively.

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Effect of surface nitridingtreatment in a steel plate on the interfacial bonding strength of the aluminum/steel clad sheets by the cold roll bonding process

Cited by 25 publications

References 26 publications

An investigation on micro-hardness, micro-structure and ductility of clad layer in copper clad aluminum wire under multi stage–NCWD

An investigation on micro-hardness, micro-structure and ductility of clad layer in copper clad aluminum wire under multi stage–NCWD

Interfacial Characterization and Bonding Properties of Copper/Aluminum Clad Sheets Processed by Horizontal Twin-Roll Casting, Multi-Pass Rolling, and Annealing

Free Intermetallic Cladding Interface between Aluminum and Steel through Friction Stir Processing

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