Using cold roll bonding and annealing to process Ti/Al multi-layered composites from elemental foils

Luo, Jian-Guo; Acoff, Viola L.

doi:10.1016/j.msea.2004.01.021

Cited by 181 publications

(89 citation statements)

References 25 publications

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“…The EDX analysis shows that this reaction layer is TiAl3, and it is the only new phase of heat generated during the heat treatment process. This result is also consistent with the conclusions in the previous literature [6][7][8].…”

Section: Methodssupporting

confidence: 94%

Effect of Heat Treatment Temperature on the Growth of Al / Ti Joining Interface Reaction Layer

Li¹,

Qiu²,

Zhao³

et al. 2018

Proceedings of the 2017 3rd International Forum on Energy, Environment Science and Materials (IFEESM 2017)

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Abstract. In this paper, aluminum alloy and titanium as the research object, the resistance spot welding and post-weld heat treatment were conducted to study the Al/Ti interface reaction layer formation and growth characteristics. Besides, the effect of heat treatment temperature on the growth of Al/Ti bonded interface was investigated under the same heat treatment time. The results show that TiAl3 is the only new phase formed during the heat preservation process. At the same holding time, the thickness of the Al/Ti interface reaction layer increases exponentially with the increase of the heat treatment temperature.

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Section: Methodssupporting

confidence: 94%

Effect of Heat Treatment Temperature on the Growth of Al / Ti Joining Interface Reaction Layer

Li¹,

Qiu²,

Zhao³

et al. 2018

Proceedings of the 2017 3rd International Forum on Energy, Environment Science and Materials (IFEESM 2017)

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“…Generally, when the annealing temperature is less than 923 K, the titanium aluminide forms TiAl 3 at fairly low temperatures in the prior Al-rich layer after just a few hours [25]. The element distribution in a local zone of Figure 1e is shown in Figure 2.…”

Section: Resultsmentioning

confidence: 99%

Abnormally high residual dislocation density in pure aluminum after Al/Ti/Al laminate annealing for seven days

Lü

Kong

2014

Philosophical Magazine Letters

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. (2014). Abnormally high residual dislocation density in pure aluminum after Al/Ti/Al laminate annealing for seven days. Philosophical Magazine Letters: structure and properties of condensed matter, 94 (11), 732-740.Abnormally high residual dislocation density in pure aluminum after Al/ Ti/Al laminate annealing for seven days AbstractWe report an abnormally high residual dislocation density in aluminium in an Al/Ti/Al laminate annealed at 873 K for seven days. The residual dislocation density reaches 7.5 x 1014 m−2, higher than that in aluminum after severe plastic deformation processes such as accumulative roll bonding and high-pressure torsion. It is proposed that the high residual dislocation density may result from obstruction of the movement of TiAl3 nanoparticles by the grain boundary and Ti atoms conglomerating at vacancies distributed in the aluminium matrix at a high temperature for a sufficient time to allow a relatively stable crystal.

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“…However, there is also evidence that the opposite behaviour is the case for this diffusion couple [17,20], namely that Ti is predominantly diffusing into the Al rich side. In contrast, earlier works show that the only diffusing element in that system below 660°C is Al [21].…”

Section: Mesostructurementioning

confidence: 96%

“…In literature, the making of titanium aluminides from elemental foils [12], powders [13] or by reaction synthesis [14] usually involves the formation of the tetragonal TiAl 3 phase when annealing is conducted below the melting point of Al [9,12,[14][15][16][17]. Above the melting point of Al, e.g., at 950°C, all phases present in the equilibrium phase diagram of Ti and Al [18] are observed.…”

Section: Introductionmentioning

confidence: 99%

Processing of Intermetallic Titanium Aluminide Wires

Marr

Freudenberger

Kauffmann

et al. 2013

Metals

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This study shows the possibility of processing titanium aluminide wires by cold deformation and annealing. An accumulative swaging and bundling technique is used to co-deform Ti and Al. Subsequently, a two step heat treatment is applied to form the desired intermetallics, which strongly depends on the ratio of Ti and Al in the final composite and therefore on the geometry of the starting composite. In a first step, the whole amount of Al is transformed to TiAl 3 by Al diffusion into Ti. This involves the formation of 12% porosity. In a second step, the complete microstructure is transformed into the equilibrium state of γ-TiAl and TiAl 3 . Using this approach, it is possible to obtain various kinds of gradient materials, since there is an intrinsic concentration gradient installed due to the swaging and bundling technique, but the processing of pure γ-TiAl wires is possible as well.

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Using cold roll bonding and annealing to process Ti/Al multi-layered composites from elemental foils

Cited by 181 publications

References 25 publications

Effect of Heat Treatment Temperature on the Growth of Al / Ti Joining Interface Reaction Layer

Effect of Heat Treatment Temperature on the Growth of Al / Ti Joining Interface Reaction Layer

Abnormally high residual dislocation density in pure aluminum after Al/Ti/Al laminate annealing for seven days

Processing of Intermetallic Titanium Aluminide Wires

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