Asymmetric accumulative roll bonding of aluminium–titanium composite sheets

Ng, Hoi Pang; Przybilla, Thomas; Schmidt, Christian W.; Lapovok, Rimma; Orlov, Dmitry; Höppel, H. W.; Göken, Mathias

doi:10.1016/j.msea.2013.04.027

Cited by 51 publications

(27 citation statements)

References 31 publications

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“…The edge regions where sheets tend to tear from each other were cut away and the central part with good initial bonding strength was used for following processing. Details of ARB processing can be found in early works [26,37]. The as-ARB processed samples were annealed together at 250 C for 2 h in a vacuum tube furnace under argon atmosphere and thereafter labeled as N2, N3 and N5, respectively.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…However, this theory was based on simple assumptions, which does not represent real complex materials very well. In fact, laminate components are mostly engineered from polycrystalline matrix and none of them are absolutely rigid [26,27]. Additionally, the details of GND density configuration and their dependence on interface spacing are not well described in the conventional theory and have been rarely investigated experimentally.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical properties of copper/bronze laminates: Role of interfaces

et al. 2016

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a b s t r a c tInterfaces play a crucial role in mechanical behaviors of both laminated and gradient structured materials. In this work, copper/bronze laminates with varying interface spacing were fabricated by accumulative roll bonding and subsequent annealing to systematically study the interface effect on mechanical properties. Heterogeneities exist in chemical composition, grain size, hardness and texture across the interfaces. Simultaneous improvement of strength and ductility with decreasing interface spacing is found in tensile tests. Extra geometrically necessary dislocations (GNDs) are found to accumulate in the vicinity of interfaces, which is due to mechanical incompatibility across the interfaces. Importantly, an interface-affected zone spanning a few micrometers was found, which is not affected by interface spacing. These observations suggest the existence of an optimum spacing, which may produce the highest hardening capacity and ductility without sacrificing strength.

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Section: Experimental Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mechanical properties of copper/bronze laminates: Role of interfaces

et al. 2016

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“…In addition, the Ti/Al system is economically more attractive than monolithic titanium by the joining of relatively inexpensive aluminum. Recently, there are a lot of researches on the fabrication of Ti/Al laminated composite by roll bonding [12,13,[22][23][24][25]. Ng et al [22] investigated the asymmetric accumulative roll bonding (AARB) of aluminum-titanium composite sheets.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of Al/Ti/Al laminated composites prepared by roll bonding

Huo

Liu

et al. 2015

Materials Science and Engineering: A

123

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“…Special attention is paid to the investigation of DSR of hexagonal metals such as magnesium [4,[16][17][18] and titanium [6,[19][20][21]. Hoi Pang Ng et al combined roll bonding and asymmetric rolling on Ti/Al composite sheets with up to four rolling passes and observed a remarkable higher grain refinement and increasing inter diffusion compared to symmetric ARB [22]. However, the thin Ti layers show considerable necking.…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, the layered structure is destroyed and the matrix is capable of deformation. Thus, strengthening of the composite is mainly accomplished by strengthening the Al matrix [22]. In summary, the use of shear deformation in Ti/Al multi-layered sheets is still unrevealed, when (i) the multi-layered architecture has to be preserved during processing and (ii) a high deformation strain has to be achieved.…”

Section: Introductionmentioning

confidence: 99%

Ti/Al Multi-Layered Sheets: Differential Speed Rolling (Part B)

Romberg

Freudenberger

Watanabe

et al. 2016

Metals

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Differential speed rolling has been applied to multi-layered Ti/Al composite sheets, obtained from accumulative roll bonding with intermediate heat treatments being applied. In comparison to conventional rolling, differential speed rolling is more efficient in strengthening the composite due to the more pronounced grain refinement. Severe plastic deformation by means of rolling becomes feasible if the evolution of common rolling textures in the Ti layers is retarded. In this condition, a maximum strength level of the composites is achieved, i.e., an ultimate tensile strength of 464 MPa, while the strain to failure amounts to 6.8%. The deformation has been observed for multi-layered composites. In combination with the analysis of the microstructure, this has been correlated to the mechanical properties.

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Asymmetric accumulative roll bonding of aluminium–titanium composite sheets

Cited by 51 publications

References 31 publications

Mechanical properties of copper/bronze laminates: Role of interfaces

Mechanical properties of copper/bronze laminates: Role of interfaces

Microstructure and mechanical properties of Al/Ti/Al laminated composites prepared by roll bonding

Ti/Al Multi-Layered Sheets: Differential Speed Rolling (Part B)

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