Sandwich Rolling of Twin-roll Cast Aluminium-steel Clad Strips

Stolbchenko, Mykhailo; Grydin, Olexandr; Nürnberger, Florian; Samsonenko, Andrii; Schaper, Mirko

doi:10.1016/j.proeng.2014.10.187

Cited by 16 publications

(9 citation statements)

References 6 publications

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“…Moreover, a good cold formability of the twin-roll cast and consequently hot rolled clad strip of pure aluminium and austenitic steel is shown in 8 . The results of the research on the roll bonding of two-layer (Al -Al) and a three-layer (Al -steel -Al) compositions are described in 9 .…”

Section: Introductionmentioning

confidence: 97%

Roll Bonding of Steel Net-Reinforced Aluminium Strips

et al. 2018

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The present study is dedicated to the experimental determination of strain parameters at rolling of aluminium matrix with inserted wire netting. Two types of stainless steel fabric netting with different orientation to the rolling axis were placed between two aluminium strips and hot rolled. The rolling temperature and reduction were varied to achieve the sound bonding between the matrix layers and steel net. During the study, the following main investigations were made: strain on areas of longitudinal and transverse cross sections of the composite was measured; stretching and ovalization of net wiring and changes in the net cell angles were determined; mechanical properties of composites along the rolling direction were tested. The experiments were summarized by following contradiction: the contact pressure, required for the bonding of aluminium layers, produces extreme tensile strain on the inserted wires, reducing the mechanical properties of the reinforcing net and, consequently, reducing the properties of the entire composite. Strips with diagonally oriented reinforcing net showed the best results in the longitudinal tension tests.

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Section: Introductionmentioning

confidence: 97%

Roll Bonding of Steel Net-Reinforced Aluminium Strips

et al. 2018

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“…In CRB, the solid state weld is achieved by a substantial and simultaneous plastic deformation of the metals at room temperature [1]. The disadvantage is a large number of secondary operations and high requirements for bonding surface preparation [2], which are critical to bond quality. Current industry practice for inspection is destructive testing using a chisel test, peel test, shear test, Erichsen cup test or hot hammer test [1].…”

Section: Introductionmentioning

confidence: 99%

Implementing an online bond quality inspection system for cold roll bonded Al/Al-Sn/Al/steel strips using guided wave EMATs

Tallafuss¹,

Rosochowski²,

Campbell

et al. 2018

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A prototype on-line bond inspection system for Al/Al-Sn/Al/steel strips is introduced to detect bond defects that occur in the cold roll bonding (CRB) process of strips. The transmitting and receiving ElectroMagnetic Acoustic Transducer (EMAT) probes inspect 100% material volume whilst the strip is processed continuously. The inspection signals are processed in real-time and are stored for post-processing. Serial production strips with good bond as well as with defects along the bond line were inspected for rigorous testing of the prototype machine. The inspection results were statistically analysed to determine an alarm threshold for serial inspection. The most important results are that the guided waves are sensitive enough for practical non-destructive testing (NDT) to detect all bond defects with only 0.5% false alarm rate, which nowadays can only be detected with a destructive peel-off test. The detection of all kinds of bond defects would lead to unreasonable levels of scrap due to false alarms. The application of this prototype EMAT inspection system to an industrial strip processing line shows that on-line detection of significant defects in CRBed Al/Al-Sn/Al/steel strips in a harsh serial production environment is possible. Design improvements are proposed to address the issues that occurred during inspection trials to design a more robust mechanical machine for the industrialisation of an EMAT inspection system.

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“…However, the process window in TRC is relatively narrow because proper heat balance should be built (Zhang et al, 2015). As a result, clad sheet produced by TRC technique has not been put into use due to lack of process stability and low sheet quality (Stolbchenko et al, 2014).…”

Section: Introductionmentioning

confidence: 99%