Interfacial characteristics and mechanical properties of TiAl/Ti6Al4V laminate composite (LMC) fabricated by vacuum hot pressing

Hong, Zhu; Sun, Wei; Kong, Fantao; Wang, Xiaopeng; Song, Zhiheng; Chen, Yuyong

doi:10.1016/j.msea.2018.07.086

Cited by 44 publications

(9 citation statements)

References 22 publications

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“…The interactions and constraints between the different layers in a laminated material lead to codeformation, and this allows the composite material to combine the excellent properties of the layers to achieve better mechanical properties [20]. Considering the preparation of laminated composites, various processing methods such as vacuum hot pressing (VHP) [21], explosive welding [22], high pressure torsion (HPT) [23] and rolling [24] have been proposed. For the VHP process, the good metallurgical combination by diffusion between layers can be realized under high temperature and pressure.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties optimization and microstructure analysis of pure copper gradient laminates via rolling

Gao

Wang

Zhao

et al. 2022

Preprint

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Heterostructured (HS) material with extraordinary mechanical properties has been regarded as one of the most promising structural materials. In this paper, heterogeneous lamella structure (HLS) Cu laminates composed of surface elongated-grain layer and center equiaxed-grain layer were fabricated via rolling bonding and annealing. In order to study the interface effect on mechanical properties of gradient structured materials，both the laminate metal composite (LMC) and the non-composite laminate (NCL) were fabricated by cold-rolling pretreatment of the center layer (60% reduction) and cold-rolling bonding of the whole blank (67% reduction). Then by controlling the post-annealing regimes, the HLS was obtained and the microstructure of each layer was optimized, and a larger degree of microstructure heterogeneities such as grain size, misorientation angle and grain orientation were obtained, which resulted in obvious mechanical differences. Tensile tests of HLS, surface layer, center layer and NCL specimens reveal that the HLS annealed at 300°C/1h has a significantly higher strength than the center layer and a higher elongation than the surface layer. The HLS have a tensile strength and elongation at fracture of 278.08 MPa and 46.2%, respectively, which shows good balance of strength and plasticity. The main reason for the improved properties is the strengthening or strain hardening generated by the inhomogeneous deformation of the heterogeneous layers in the laminate and the mutual constraint acquired by the distinct layers with strong mechanical differences. The HLS has an interfacial bonding strength of 178.5 MPa, which plays a vital role in the coordinated deformation of heterogeneous layers. The method of obtaining gradients in homogeneous materials proposed in this study provides a new way of thinking and enriches the theoretical basis for the comprehensive performance improvement of traditional metallic materials.

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Section: Introductionmentioning

confidence: 99%

Mechanical properties optimization and microstructure analysis of pure copper gradient laminates via rolling

Gao

Wang

Zhao

et al. 2022

Preprint

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“…At room temperature, TiAl intermetallic alloys comprise of three major phases of intermetallics, namely; α 2 -Ti 3 Al (D0 19 structure), γ-TiAl (L1 0 structure) and β o -TiAl (B2 structure) [ 1 , 4 , 7 , 18 , 20 , 26 , 27 , 28 , 29 ]. The γ-TiAl phase has L1 0 tetragonal structure while α 2 -Ti 3 Al phase has a D0 19 hexagonal structure [ 30 , 31 , 32 , 33 , 34 ]. Also, the γ-TiAl phase is formed at 49 to 66 at.% Al content [ 14 ] that could be stabilized up to its melting temperature (~1450 °C) [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

“…The α 2 -Ti 3 Al phase has an ordered hexagonal closed packed (HCP) structure [ 33 , 34 ] formed between 22 to 39 at.% Al content and transforms to an ordered structure from the disordered one at about 1180 °C with lattice parameters, a = 0.5782 nm and c = 0.4629 nm [ 14 , 34 ]. It is known to exhibit extremely poor toughness and tensile ductility at ambient temperatures while possessing good oxidation resistance and excellent elevated temperature specific strength [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

“…This will help in understanding and further the development of β-solidifying γ-TiAl-based alloys. Furthermore, β 0 -phase has a body-centred cubic (BCC) structure which is similar to conventional β-phase Ti alloys with B2 superlattice structure [ 33 ]. As stated earlier, the disordered elevated temperature β-phase changes to a very brittle and hard β 0 -phase at room temperature (RT) [ 16 ]; while ordered β 0 -phase dissolving to disordered β-phase at about 1175–1205 °C [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

“…The γ-TiAl phase has L1 0 tetragonal structure while α 2 -Ti 3 Al phase has a D0 19 hexagonal structure [30,31,32,33,34]. Also, the γ-TiAl phase is formed at 49 to 66 at.% Al content [14] that could be stabilized up to its melting temperature (~1450 C) [28].…”

Section: Introductionmentioning

confidence: 99%

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Characteristic effects of alloying elements on β solidifying titanium aluminides: A review

Raji

Popoola

Pityana

2020

Heliyon

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The high strength-to-weight ratio property of titanium aluminide (TiAl) based intermetallic alloys makes researchers regard this type of material as a potential replacement for the heavier superalloys of nickel. These alloys have been applied as turbocharger wheels of automobile and turbine blades of aircraft engines. A much recent alloy type of TiAl called the TNM alloy has emerged and primarily amenable to mechanical working; while providing the best combinations of mechanical properties that could be achieved through manufacturing processes with subsequent heat treatments. This is attained by solidifying entirely through the disordered β-phase (A2 structure). Effects of major alloying elements such as strength improvement, microstructural stability and phase formation demand the understanding of these alloying elements addition in TiAl-based intermetallic alloys. This review paper aims at encapsulating several works regarding the effects of major alloying elements on β-solidifying TiAl-based alloys and summarizing the characteristic effects of Si for these types of alloys. An impetus for future works on these types of intermetallic TiAl-based alloys is also presented.

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Microstructure and Strengthening Mechanism of Ti/Cu Laminated Composite Produced by Underwater Explosive Welding

Sun

Guo

Zhang

et al. 2020

J. of Materi Eng and Perform

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Interfacial characteristics and mechanical properties of TiAl/Ti6Al4V laminate composite (LMC) fabricated by vacuum hot pressing

Cited by 44 publications

References 22 publications

Mechanical properties optimization and microstructure analysis of pure copper gradient laminates via rolling

Mechanical properties optimization and microstructure analysis of pure copper gradient laminates via rolling

Characteristic effects of alloying elements on β solidifying titanium aluminides: A review

Microstructure and Strengthening Mechanism of Ti/Cu Laminated Composite Produced by Underwater Explosive Welding

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