Ti/Al Multi-Layered Sheets: Accumulative Roll Bonding (Part A)

Romberg, Jan; Freudenberger, J.; Bauder, Hansjörg; Plattner, Georg; Krug, Hans; Holländer, Frank; Scharnweber, Juliane; Eschke, Andy; Kühn, U.; Klauß, H.; Oertel, C.‐G.; Skrotzki, Werner; Eckert, J.; Schultz, L.

doi:10.3390/met6020030

Cited by 19 publications

(18 citation statements)

References 44 publications

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“…Unfortunately, the homogeneity of rolling is also influenced by the deformation conditions, for example, rolling reduction, deformation rate and temperature. For example, necking in ARB Ti/Al is more pronounced when rolling is carried out at lower rolling speed …”

Section: Arb Lmcsmentioning

confidence: 99%

“…It has been found that in a stack of two sheets of high purity titanium between three sheets of the aluminum alloy AA5049, each having an initial thickness of 1 mm, necking during ARB can be significantly delayed by both an increased rolling speed and an IA between rolling passes . Therefore, after each rolling pass carried out without lubrication at ambient temperatures using 50% reduction, a rolling speed of 31.1 m min −1 and rolls with a diameter of 110 mm, an IA has been performed at 450 °C for 90 min.…”

Section: Selected Arb Systemsmentioning

confidence: 99%

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Microstructure, Texture, and Mechanical Properties of Laminar Metal Composites Produced by Accumulative Roll Bonding

et al. 2018

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The paper aims to summarize the research on Laminar Metal Composites produced by Accumulative Roll Bonding. After some notes on the general subject, frequent material combinations and the issue of bonding are addressed. Then, the evolution of microstructure, texture, and mechanical properties typically observed in such materials is briefly summarized. Furthermore, the crucial aspect of layer continuity is discussed. In the main part, detailed experimental insight is provided for three representatives of different structural developments, namely Al2N/Al5N, Cu/Nb, and Ti/Al. The chosen systems represent different levels of component dissimilarity, as Al2N/Al5N is a combination of the same face centered cubic metal with varying purity while Cu/Nb and Ti/Al are combinations of face centered cubic with both body centered cubic and hexagonal close packed metals, respectively. As the layer thicknesses span different ranges, the composites also illustrate both the opportunities and experimental challenges of ARB Laminar Metal Composites.bonding (in the following, those processes will be referred to "ARB"), often supplemented by annealing and rolling steps. Naturally, a high percentage of the scientific attention regarding LMCs is bestowed on Al alloys, for example, [7,25,[43][44][45][46][47][48][49][50] whose assets are excellent formability and corrosion resistance while being low in both weight and price.Al alloys are frequently combined in order to improve specific properties, for example, [51][52][53][54][55] A strong but corrosion susceptible Al alloy of series 2xxx, for example, benefits from the combination with a less strong but corrosion resistant alloy of series 6xxx. [50] Likewise, in LMCs of series 5xxx and 6xxx, both surface quality and weldability are improved due to the reduction of the PLC-effect [53] and hot cracking, [55] respectively.By combining Al with both Fe [56][57][58] or Cu, [45,59] the magnetic properties of the former and the electrical properties of the latter can be used to produce LMCs with potential in microelectronics and in electrical power industry, [60] respectively. Other components in LMCs with Cu are Ag, [61] Zn, [62] both Zn and Al, [63] and both Al and Ni. [64] Nb receives major scientific attention due to its superconducting properties, which work especially well in a finelayered structure with Cu or Al, [65] which are chosen for their low solubility in Nb and the absence of mutual intermetallics. In contrast, other LMCs are produced especially for intermetallic transition, for instance Al/Fe, [57,58,66] Al/Mg, [43,44] Al/Ti, [67][68][69][70][71] Al/Ni, [72,73] Ti/Nb, [74] or Ti/Al/Nb. [74] When high specific strength in combination with sufficient formability and ductility is the foremost requirement, Al is often combined with high-strength partners such as steel, for example, [66,75] Mg, for example, [46,76,49] Ti, for example, [67][68][69]74,[77][78][79][80][81][82][83][84][85][86] as well as both Mg and Ti. [87] Furthermore, Ti is paired with Fe, [88,89] Cu, for example, [90,...

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Section: Arb Lmcsmentioning

confidence: 99%

Section: Selected Arb Systemsmentioning

confidence: 99%

Microstructure, Texture, and Mechanical Properties of Laminar Metal Composites Produced by Accumulative Roll Bonding

et al. 2018

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“…This composite is composed of 160 continuous layers. For any details, please refer to part A of this study [1].…”

Section: Methodsmentioning

confidence: 99%

“…Multi-layered sheets have been obtained from a stack of three Al and two Ti sheets being alternatingly placed, i.e., Al-Ti-Al-Ti-Al, and accumulatively roll bonded as described in part A of this study [1]. This sheet could be further processed by ARB as the Al is always at the outer side of the composite which eases roll bonding.…”

Section: Differential Speed Rolling Of Ti/al-multi-layersmentioning

confidence: 99%

“…Hence, the stability of the layers is crucial when aiming at maximum phase boundary area. Part A of this study [1] revealed that the stability of the layers can be maintained by introducing an intermediate heat treatment (IHT) after each individual ARB cycle. However, IHT leads to recovery and, therefore, reduces the effect of strain hardening introduced by rolling.…”

Section: Introductionmentioning

confidence: 99%

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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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Accumulative Roll Bonding at Room Temperature of a Bi‐Metallic AA5754/AA6061 Composite: Impact of Strain Path on Microstructure, Texture, and Mechanical Properties

et al. 2017

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Accumulative roll bonding (ARB) is performed at room temperature on an aluminum composite up to five rolling cycles, using two different paths: the conventional one (ARB) and the cross ARB (CARB) one consisting of a 90 rotation of the rolling direction before each rolling pass. The microstructure is refined faster by CARB than by ARB occasioning higher yield strength of the elaborated samples. Besides, CARB has the ability to delay the loss of stratification of the composite. The resulting textures are different: while ARB promotes typical rolling components (Brass {011}<211>, Goss {110}<001>, Dillamore {4 4 11}<11 11 8>), S {123}<634>), CARB promotes the ND-rotated Brass {011}<755> instead of Brass together with the S and Dillamore components. A Visco-Plastic Self-Consistent (VPSC) simulation highlights that the ND-rotated Brass had Brass and S components for origin. The ND-rotated Brass presence in the texture promotes a better mechanical isotropy of the composite sheet.

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Ti/Al Multi-Layered Sheets: Accumulative Roll Bonding (Part A)

Cited by 19 publications

References 44 publications

Microstructure, Texture, and Mechanical Properties of Laminar Metal Composites Produced by Accumulative Roll Bonding

Microstructure, Texture, and Mechanical Properties of Laminar Metal Composites Produced by Accumulative Roll Bonding

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

Accumulative Roll Bonding at Room Temperature of a Bi‐Metallic AA5754/AA6061 Composite: Impact of Strain Path on Microstructure, Texture, and Mechanical Properties

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