A multiscale description of bond formation in cold roll bonding considering periodic cracking of thin surface films

2019 ◽  
Vol 137 ◽  
pp. 103142 ◽  
Author(s):  
Kavan Khaledi ◽  
Tim Brepols ◽  
Stefanie Reese
Keyword(s):  
Bond Formation ◽  
Surface Films ◽  
Roll Bonding ◽  
Cold Roll ◽  
Cold Roll Bonding

Finite Element Modeling of Bond Formation in Cold Roll Bonding Processes

2018 ◽  
Vol 767 ◽  
pp. 323-330 ◽  
Author(s):  
Kavan Khaledi ◽  
Stephan Wulfinghoff ◽  
Stefanie Reese
Keyword(s):  
Plastic Deformation ◽  
Finite Element ◽  
Bond Strength ◽  
Bond Formation ◽  
Element Model ◽  
Roll Bonding ◽  
Peeling Test ◽  
Cold Roll ◽  
Cold Roll Bonding ◽  
Welding Processes

The paper aims to present a finite element model for the bond strength evolution in cold roll bonding processes. To accomplish this, first, the micro-mechanisms taking place along the cold welded joint interfaces are explained. Then, based on the microscopic description of cold welding processes, a bonding interface model is employed to describe the bond formation between the rolled metallic layers. The obtained bond strength is calculated based on the governing parameters of the bonding such as the degree of plastic deformation and the surface cleanness. The numerical simulation given in this paper includes the modelling of joining during cold roll bonding followed by the debonding process in Double Cantilever Beam (DCB) peeling test. Finally, the effects of two important factors on the bond formation, i.e. (1) the degree of plastic deformation and (2) the surface cleanness, are numerically investigated.

Effect of Pre-Rolling Heat Treatments on the Bond Strength of Cladded Galvanized Steels in a Cold Roll Bonding Process

2016 ◽  
Vol 87 (12) ◽  
pp. 1619-1626 ◽  
Author(s):  
Illia Hordych ◽  
Dmytro Rodman ◽  
Florian Nürnberger ◽  
Christian Hoppe ◽  
Hans Christian Schmidt ◽  
...  
Keyword(s):  
Bond Strength ◽  
Heat Treatments ◽  
Bonding Process ◽  
Roll Bonding ◽  
Galvanized Steels ◽  
Cold Roll ◽  
Cold Roll Bonding ◽  
Rolling Heat

scholarly journals Effect of wire brushing on cold roll bonding of Al 1050 sheets

2015 ◽  
Vol 18 (2) ◽  
pp. 3-4
Author(s):  
W abdelaziem ◽  
N Elmahalawy ◽  
M Hassan ◽  
A Fathy
Keyword(s):  
Roll Bonding ◽  
Cold Roll ◽  
Cold Roll Bonding ◽  
Wire Brushing

The Research Status of Titanium Clad Steel

2014 ◽  
Vol 941-944 ◽  
pp. 187-192
Author(s):  
Jia Geng Liu ◽  
Jing Tao Han ◽  
Jing Liu ◽  
Shuai Ji
Keyword(s):  
Base Metal ◽  
Explosive Welding ◽  
Surface Layers ◽  
Roll Bonding ◽  
Research Status ◽  
Cold Roll ◽  
Cold Roll Bonding ◽  
New Ideas ◽  
Clad Steel ◽  
Atom Bond

The main methods for manufacturing titanium clad steel are described, also the mechanisms of cold roll bonding and explosive welding are specifically analyzed. It is showed that two opposing brittle surface layers produced by scratch brushing break up and underlying base metal is extruded through cracks of the broken layers and creates an atom-to-atom bond for cold roll bonding, however, a lot of parameters affect the bonding for explosive welding. Some new ideas for manufacturing titanium clad steel is discussed herein.

Enhanced Plasticity of Cu-Based Laminated Composites Produced by Cold Roll-Bonding

2010 ◽  
Vol 667-669 ◽  
pp. 1015-1020
Author(s):  
H.S. Liu ◽  
Bin Zhang ◽  
G.P. Zhang
Keyword(s):  
Laminated Composites ◽  
Uniform Elongation ◽  
Laminated Composite ◽  
Plastic Instability ◽  
Interface Bonding ◽  
Roll Bonding ◽  
Cold Roll ◽  
Submicron Scale ◽  
Cold Roll Bonding ◽  
Cold Rolled

Two different laminated composites with submicron-scale grain size and strong interface bonding toughness, Cu/Al and Cu/Cu, were fabricated by cold-roll bonding at ambient temperature, and then annealing of the laminated composites was conducted to get different interface bonding toughness. It was found that a better strength-plasticity combination for the laminated composites could be obtained through stronger interface bonding toughness, which effectively delayed the onset of plastic instability and premature local necking of the material. Uniform elongation of both Cu/Al and Cu/Cu laminated composites was enhanced compared with that of the cold-rolled Cu. At the same strength level, plasticity of the Cu/Cu laminated composite is better than that of the Cu/Al one and that of the cold-rolled Cu. Mechanisms of plasticity instability and fracture of the laminated composites were evaluated.

scholarly journals Effect of Annealing on the Interface and Mechanical Properties of Cu-Al-Cu Laminated Composite Prepared with Cold Rolling

Materials ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 369
Author(s):  
Xing Fu ◽  
Rui Wang ◽  
Qingfeng Zhu ◽  
Ping Wang ◽  
Yubo Zuo
Keyword(s):  
Mechanical Properties ◽  
Annealing Temperature ◽  
Laminated Composite ◽  
Phase Evolution ◽  
Annealing Process ◽  
High Annealing Temperature ◽  
Roll Bonding ◽  
Cold Roll ◽  
High Annealing ◽  
Cold Roll Bonding

Cu-Al-Cu laminated composite was prepared with cold roll bonding process and annealing was carried out to study the phase evolution during the annealing process and its effect on the mechanical properties of the composite. The experimental results showed that after annealing the brittle intermetallics in the interface mainly includes Al4Cu9, AlCu and Al2Cu. With the increase of annealing temperature, the tensile strength of the composite decreases and the elongation shows a different variation which increases at the beginning and then decreases after a critical point. This phenomenon is related to the evolution of intermetallic compounds in the interface of the composite. It was also found that the crack source of the tensile sample is in the interface and delamination appeared at high annealing temperature (450 °C).

Cold roll bonding of 5754-aluminum strips

2002 ◽  
Vol 335 (1-2) ◽  
pp. 186-190 ◽  
Author(s):  
H.R Madaah-Hosseini ◽  
A.H Kokabi
Keyword(s):  
Roll Bonding ◽  
Cold Roll ◽  
Cold Roll Bonding
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