The Kinetics of TiAl3 Formation in Explosively Welded Ti-Al Multilayers During Heat Treatment

Foadian, Farzad; Soltanieh, M.; Adeli, Mandana; Etminanbakhsh, Majid

doi:10.1007/s11663-016-0710-1

Cited by 21 publications

(17 citation statements)

References 18 publications

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“…Previous studies reveal that the brittle intermetallic compounds (IMCs) layer formed at the welding interface seriously impair the mechanical properties of the joint [10,11]. On the other hand, Ti-TiAl 3 metal-intermetallic laminate (MIL) composites are considered as a great potential material for aerospace, automotive, and other structural applications because of its combination of high strength, toughness, and stiffness at a lower density than monolithic titanium or other laminate systems [12]. To fabricate the MIL composites, aluminum and titanium sheets are pressed together by use of explosive welding [12,13,14] and hot press bonding [15,16,17,18].…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, Ti-TiAl 3 metal-intermetallic laminate (MIL) composites are considered as a great potential material for aerospace, automotive, and other structural applications because of its combination of high strength, toughness, and stiffness at a lower density than monolithic titanium or other laminate systems [12]. To fabricate the MIL composites, aluminum and titanium sheets are pressed together by use of explosive welding [12,13,14] and hot press bonding [15,16,17,18]. During producing of MIL, it is indispensable to form a continuous IMCs layer at Al/Ti interface, so much so that a post-bonding annealing treatment is often employed [12,13,14,15,16,17].…”

Section: Introductionmentioning

confidence: 99%

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Growth Characterization of Intermetallic Compound at the Ti/Al Solid State Interface

Zhao

Qiu

et al. 2019

Materials

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Ti-Al diffusion couples, prepared by resistance spot welding, were annealed up to 112 h at 823, 848, and 873 K in ambient atmosphere. The interfacial microstructure was observed and analyzed using SEM and TEM. The growth characterization of intermetallic compound formed at the Ti/Al solid state interface was investigated. Only TiAl3 phase was detected in the interfacial zone, and its growth was governed by reaction-controlled mechanism in the previous period and by diffusion-controlled mechanism in the latter period. The activation energies were 198,019 and 122,770 J/mol for reaction-controlled and diffusion-controlled mechanism, respectively.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Growth Characterization of Intermetallic Compound at the Ti/Al Solid State Interface

Zhao

Qiu

et al. 2019

Materials

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“…The literature does not provide an unequivocal assessment of the fracture toughness of explosive welded aluminum and titanium alloys. Some studies prove that, in general, explosive welding allows a good fracture toughness due to the particular structural state of the welds formed by the dynamic interaction of workpieces [33,34]. However, at the same time, brittle intermetallics, characterized by low fracture toughness, can occur in the weld zone [35].…”

Section: Of 20mentioning

confidence: 99%

Investigation of the Fracture Process of Explosively Welded AA2519–AA1050–Ti6Al4V Layered Material

et al. 2020

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The study presents an analysis of the cracking process of explosive welded layered material AA2519–AA1050–Ti6Al4V (Al–Ti laminate) at ambient (293 K) and reduced (223 and 77 K) temperatures. Fracture toughness tests were conducted for specimens made of base materials and Al–Ti laminate. As a result of loading, delamination cracking occurred in the bonding layer of specimens made from Al–Ti laminate. To define the crack mechanisms that occur at the tested temperatures, a fracture analysis was made using a scanning electron microscope. Moreover, acoustic emission (AE) signals were recorded while loading. AE signals were segregated to link their groups with respective cracking process mechanisms. Numerical models of the tested specimens were developed, taking into account the complexity of the laminate structure and the ambiguity of the cracking process. A load simulation using the finite element method FEM allowed calculating stress distributions in the local area in the crack tip of the Al–Ti laminate specimens, which enabled the explanation of significant material cracking process development aspects. Results analysis showed an influence of interlayer delamination crack growth on the process of the Al–Ti laminate specimen cracking and the level of KQ characteristics at different temperatures.

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“…Shu-ying JIANG and Shi-chun LI [5] fabricated Al−Ti diffusion couples by embedded technology, studied the growth mechanism of Al/Ti IMCs and suggested that the growth interface moves toward the aluminum side. Foadian F [6] fabricated Ti-Al3Ti laminated by explosion welding, and two mechanisms for TiAl3 growth exist in their study.…”

Section: Introductionmentioning

confidence: 99%

Microstructure of Al/Ti diffusion couple by resistance spot welding and annealing

Zhao¹,

Qiu²,

Li³

2018

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

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Abstract. Al-Ti diffusion couples prepared by resistance spot welding are annealed at 575°C for different time. The microstructure of the interface area was investigated. The result shows that there is no obvious intermetallic compound in the interface after welding. According to the SEM (scanning electron microscope) images, a continuous reaction layer is generated between Ti and Al matrix, and the thickness of the reaction layer increases with the annealing time goes by. A SEM equipped with energy dispersive X-ray spectroscopy (EDX) is used to identify the compounds of the reaction layer. The phase of the reaction layer is TiAl3, which is a kind of Al/Ti intermetallic compound (IMC).

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The Kinetics of TiAl3 Formation in Explosively Welded Ti-Al Multilayers During Heat Treatment

Cited by 21 publications

References 18 publications

Growth Characterization of Intermetallic Compound at the Ti/Al Solid State Interface

Growth Characterization of Intermetallic Compound at the Ti/Al Solid State Interface

Investigation of the Fracture Process of Explosively Welded AA2519–AA1050–Ti6Al4V Layered Material

Microstructure of Al/Ti diffusion couple by resistance spot welding and annealing

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