Deformation textures of aluminum in a multilayered Ti/Al/Nb composite severely deformed by accumulative roll bonding

Qu, Peng; Zhou, Liming; Acoff, Viola L.

doi:10.1016/j.matchar.2015.07.011

Cited by 27 publications

(13 citation statements)

References 35 publications

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“…Moreover, Alizadeh [21] indicated that the formation of the shear bonds was due to in-plane shear stress at the interface on the adjacent layers. Similar results were found in other studies on metal composites [17][18][19][24][25][26][27][28]. These studies indicated that relatively hard metals were prone to local necking and fracturing during the ARB process.…”

Section: Nbsupporting

confidence: 90%

“…Multiple factors led to the formation of the shear bands. Motevalli et al [24] reported that shear bands were formed as a result of the slip system that was activated in the softer matrix, and Qu et al [25] found that such phenomenon was the result of the difference in the flow properties. Moreover, Alizadeh [21] indicated that the formation of the shear bonds was due to in-plane shear stress at the Scanning electron microscopy (FEI Quanta 450 FEG, FEI, Hillsboro, OR, USA) and transmission electron microscopy (TEM, Tecnai G2 F20, FEI, Hillsboro, OR, USA) were used to observe the microstructure of the composite.…”

Section: Nbmentioning

confidence: 99%

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Microstructure and Mechanical Properties of the Ni/Ti/Nb Multilayer Composite Manufactured by Accumulative Pack-Roll Bonding

Xue-ping

Liang

2020

Metals

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In this work, accumulative pack-roll bonding successfully manufactured the Ni/Ti/Nb multilayer composite. The microstructure evolution and mechanical properties of the composite during the accumulative roll bonding (ARB) process were investigated by scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), transmission electron microscopy (TEM), micro-hardness test, and tensile tests. The results showed that the deformation of each layer was relatively uniform in the initial stage of the ARB process. After the fourth pass, the Ni/Ti interface was still relatively straight, while the Ti/Nb interface was unevenly deformed. After the fourth pass, the microstructure of the Ni layer was equiaxed grains with a decreased grain size of 200 nm, and finer equiaxed grains were observed at the interface. No dynamic recrystallization occurred in the Ti and Nb layers. The laminar structure of the Nb layer was observed, and the grains were oriented parallel to the rolling direction. Moreover, the tensile strength and micro-hardness significantly increased as the number of ARB increased. After five passes of the ARB process, the tensile strength of the composite reached 792.3 MPa, and the micro-hardness of Ni, Ti, and Nb were increased to 270.2, 307.4, and 243.4 HV, respectively.

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Section: Nbsupporting

confidence: 90%

Section: Nbmentioning

confidence: 99%

Microstructure and Mechanical Properties of the Ni/Ti/Nb Multilayer Composite Manufactured by Accumulative Pack-Roll Bonding

Xue-ping

Liang

2020

Metals

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“…Moreover, some lenticular nodules as a result of fragmentation and necking of Ti are produced in the microstructure, which is the most prominent feature in the ARB process. The occurrence of necking and discontinuity of the hard metal with relatively large strength and work hardening ability has also been reported for many other material systems [28][29][30][31][32] , due to the formation of shear bands (shown by dashed lines) across the different metal layers during deformation. The thickness distribution of Ti layers along RD is inhomogeneous, whereas the thickness reduction of Cu layers is more homogeneous.…”

Section: Assessment Of Lamellar Structuressupporting

confidence: 53%

Microstructure and Mechanical Properties of Multilayered Cu/Ti Composites Fabricated by Accumulative Roll Bonding

et al. 2017

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Multilayered composites composed of pure copper and titanium (Cu/Ti) have been fabricated by accumulative roll bonding (ARB). The macroscopic lamellar structures, mechanical properties and microstructures of the composites are investigated. The results show that the Cu and Ti layers are bonded well during the ARB processing. With the increasing number of ARB cycles, Ti layers start to neck, fracture and even segregate within the Cu matrix, which is attributed to the activation of shear bands that cut through the multiple metal layers. At larger ARB cycles, the distribution of small fragmentations of Ti inside the Cu matrix is more homogeneous, which is attributed to the fact that the outer surfaces of the previously processed composite are placed in the interior of the subsequent ARB stack. Tensile testing at room temperature shows that the yield strength and the ultimate strength of the composites increased mildly with the increasing ARB cycles, while the uniform elongation of the composites is retained. Microhardness tests reveal that the increase of strength in the composites during ARB mainly results from the reinforcement of the Ti layers. The mechanical behaviors of the composites can be attributed to the effect of the mixed microstructures in the both constituent metals.

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“…To obtain materials of this type, various methods, including methods of deposition, cladding, casting, accumulation roll bonding have been used to produce multilayer compositions such as Ti-Al-Nb, Ni-Al, Nb-Fe and others [1][2][3][4][5]. Such materials have enhanced mechanical properties, including strength, toughness, fatigue characteristics, etc., which makes them interesting objects for research.…”

Section: Introductionmentioning

confidence: 99%

“…For example, intermetallic compounds of niobium and aluminum have higher melting point (1680-2060 °C depending on the composition), and their density is less or comparable to the density of the studied intermetallic compounds (4.54-7.28 g/cm 3 depending on the composition) [12]. Therefore, composites containing intermetallic compounds based on niobium and aluminum are of great scientific and practical interest.…”

Section: Introductionmentioning

confidence: 99%

Multilayered Nb-Al composite manufactured by explosive welding

2017

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Abstract. In this study, the multilayered composite materials consisting of niobium and aluminum foils were produced by explosive welding. The conducted microstructural studies with the use of scanning electron microscopy (SEM) have shown that the boundaries of welded seams have predominantly a wave structure with a partial local melting of interacting materials. At the niobium/aluminum boundary, in the mixing zones, micro volumes with a non-uniform chemical composition were presented. Mechanical tests have shown that the strength properties, as well as the toughness of composite materials, are at an intermediate level relative to the initial materials.

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Deformation textures of aluminum in a multilayered Ti/Al/Nb composite severely deformed by accumulative roll bonding

Cited by 27 publications

References 35 publications

Microstructure and Mechanical Properties of the Ni/Ti/Nb Multilayer Composite Manufactured by Accumulative Pack-Roll Bonding

Microstructure and Mechanical Properties of the Ni/Ti/Nb Multilayer Composite Manufactured by Accumulative Pack-Roll Bonding

Microstructure and Mechanical Properties of Multilayered Cu/Ti Composites Fabricated by Accumulative Roll Bonding

Multilayered Nb-Al composite manufactured by explosive welding

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