Designing laminated metal composites for tensile ductility

Cohades, Amaël; Çetin, Arda; Mortensen, Alicja

doi:10.1016/j.matdes.2014.08.061

Cited by 14 publications

(8 citation statements)

References 55 publications

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“…As seen from Fig.5, when the true strain is 0. similar with the strain hardening exponent n of aluminum alloy during the deformation process [20]. (The strain hardening exponent n of copper alloy during the deformation is sensitive to strain rate [21]. )Therefore, the calculated results agree essentially with the fact that deformation mainly focus on the softer aluminum layer during the isothermal compression of Cu/Al laminated composites.…”

Section: Strain Hardening Exponentsupporting

confidence: 73%

Effect of Deformation Temperature, Strain Rate and Strain on the Strain Hardening Exponent of Copper/Aluminum Laminated Composites

Liu

Wang

Xie

2018

Advanced Composites Letters

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In order to investigate the strain hardening behaviour of Cu/Al laminated composites, isothermal compression tests were conducted in the temperature range of 300-450 o C and stain rate range of 0.01-1 s-1. Based on the experimental data, stain hardening exponent n was calculated to evaluate the strain hardening ability of Cu/Al laminated composites during the deformation process. The results show that deformation temperature, strain rate, strain and laminated structure are all responsible for the evolution of flow stress during the isothermal compression. The highly non-linear character of Ln σ-Ln ε curves shows the dynamic competition between work hardening and dynamic softening, and dynamic softening gradually plays a dominant role with the increase of strain. Furthermore, strain hardening exponent n is more sensitive to deformation temperature than strain rate. Lower deformation temperature and higher strain rate contribute to the enhancement of strain hardening exponent n.

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Section: Strain Hardening Exponentsupporting

confidence: 73%

Effect of Deformation Temperature, Strain Rate and Strain on the Strain Hardening Exponent of Copper/Aluminum Laminated Composites

Liu

Wang

Xie

2018

Advanced Composites Letters

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“…The strain-rate hardening increases the elongation, which not only delays the onset of instability, but also by retarding the consequences of necking. The laminated composites with superior tensile ductility can be obtained by adjusting the values of n and m of constitute layer [80]. Figure 18 shows the fracture elongation map of many power-law hardening monolithic materials [80,81].…”

Section: Strain Hardening Exponent (N) and Strain Rate Parameter (M)mentioning

confidence: 99%

“…The laminated composites with superior tensile ductility can be obtained by adjusting the values of n and m of constitute layer [80]. Figure 18 shows the fracture elongation map of many power-law hardening monolithic materials [80,81]. It is interesting to note that a low ductility material laminated with another material that can coax the laminated composites toward higher elongation.…”

Section: Strain Hardening Exponent (N) and Strain Rate Parameter (M)mentioning

confidence: 99%

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Multiscale Hierarchical Structure and Laminated Strengthening and Toughening Mechanisms

Liu¹,

Huang²,

Li³

et al. 2018

Lamination - Theory and Application

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Metal matrix composites with multiscale hierarchical structure and laminated structure have been developed to provide a novel route to achieve high strength, toughness and ductility. In this chapter, a lot of scientific research has been carried out in the preparation, processing, properties and application of metal matrix composite. Many toughening mechanisms and fracture behavior of composites with multiscale hierarchical structure and laminated structure are overviewed. It is revealed that elastic property and yield strength of laminated composites follow the "rule of average." However, the estimation of fracture elongation and fracture toughness is complex, which is inconsistent with the "rule of average." The fracture elongation of laminated composites is related to the layer thickness size, interface, gradient structure, strain hardening exponent, strain rate parameter and tunnel crack, which are accompanied with crack deflection, crack blunting, crack bridging, stress redistribution, local stress deformation, interfacial delamination crack and so on. The concept of laminated composites can be extended by applying different combination of individual layer, and provides theoretical as well as experimental fundamentals on strengthening and toughening of metal matrix composites.

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“…These included, for instance, titanium alloy/steel, 2-3 aluminum alloy/aluminum alloy, 4 aluminum alloy/steel, 5 brass/steel, 6 steel/steel [7][8][9] and other possible combinations. 10 Laminated metallic composites offer an abundance of topics for study, ranging from fabrication, where the flow of layers during deformation can be explored, [11][12][13] through their overall mechanical properties 14 measured, for instance, by conventional tension testing 10,15 or by three-point bend test; 16,17 used for mapping delamination during failure. 18 One can also investigate internal stresses on the interlayer interface, for instance, in a composite fabricated of martensitic and austenitic steels.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of laminated steel-based composite materials fabricated by hot rolling

Kubina¹,

Nacházel²

2017

Mater. Tehnol.

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The fabrication of laminated steel composites by hot rolling is described. Composite sandwiches were made from martensitic stainless tool steel with an increased nitrogen content and from standard AISI 304 steel using 3 to 7 layers. The maximum strength of the martensitic steel was 1370 MPa. The composite sheets had strengths in the range 950-1200 MPa, depending on the number of layers and the proportion of the steels. A metallographic observation of the fractures revealed that the first occurrence was fracture in the martensitic steel layers, followed by deformation of the layers of tough austenitic AISI 304 steel. The notch toughness values were the highest when the notch was oriented from the sheet surface to the sheet interior. Keywords: laminated composite, steel sandwich, tension test, hot rolling, notch toughness V delu je opisana izdelava laminiranih jeklenih kompozitov z vro~im valjanjem. Kompozitni sestavi so bili narejeni iz martenzitnega nerjave~ega orodnega jekla s pove~ano vsebnostjo du{ika, in v skladu s standardom AISI 304 je bilo uporabljeno jeklo s 3 do 7 sloji. Maksimalna mo~martenzitnega jekla je bila 1370 MPa. Mo~kompozitnih slojev je bila med 950-1200 MPa, odvisno od {tevila slojev in proporcev jekla. Metalografska analiza zlomov je pokazala, da je najprej pri{lo do zloma pri slojih martenzitnega jekla, sledila je deformacija slojev te`kega avstenitnega jekla AISI 304. Vrednosti`ilavosti v zarezah so bile najvi{je, kjer je bila zareza usmerjena iz povr{ine sloja v njegovo notranjost. Klju~ne besede: laminirani kompozit, sestav jekla, napetostni preizkus, vro~e valjanje,`ilavost zareze

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Designing laminated metal composites for tensile ductility

Cited by 14 publications

References 55 publications

Effect of Deformation Temperature, Strain Rate and Strain on the Strain Hardening Exponent of Copper/Aluminum Laminated Composites

Effect of Deformation Temperature, Strain Rate and Strain on the Strain Hardening Exponent of Copper/Aluminum Laminated Composites

Multiscale Hierarchical Structure and Laminated Strengthening and Toughening Mechanisms

Mechanical properties of laminated steel-based composite materials fabricated by hot rolling

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