Investigation on the crystallographic orientation relationships and interface atomic structures in an in-situ Ti2AlN/TiAl composite

Liu, Pei; Sun, Dalin; Xiao, Han; Wang, Qing

doi:10.1016/j.matdes.2017.05.061

Cited by 33 publications

(10 citation statements)

References 44 publications

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“…Among these strategies, the development of composite materials has attracted enormous interest due to the complementary benefits of matrix and reinforcing materials making up the composite. There are various reinforcing materials used for the development of composites proven to enhance properties [ 12 ], such as B 4 C [ 13 ], TiC [ 14 ], Ti 2 AlC [ 14 , 15 ], SiC [ 16 ], TiB 2 [ 17 ], oxides [ 18 ], and nitrides [ 19 ]. The use of these reinforcing materials in enhancing the chemical, physical, and mechanical properties has been documented in research work.…”

Section: Introductionmentioning

confidence: 99%

Nanoindentation and Structural Analysis of Sintered TiAl(100−x)-xTaN Composites at Room Temperature

2023

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The nanohardness, elastic modulus, anti-wear, and deformability characteristics of TiAl(100−x)-xTaN composites containing 0, 2, 4, 6, 8, and 10 wt.% of TaN were investigated via nanoindentation technique in the present study. The TiAl(100−x)-xTaN composites were successfully fabricated via the spark plasma sintering technique (SPS). The microstructure and phase formation of the TiAl sample constitute a duplex structure of γ and lamellar colonies, and TiAl2, α-Ti, and TiAl phases, respectively. The addition of TaN results in a complex phase formation and pseudo duplex structure. The depth-sensing indentation evaluation of properties was carried out at an ambient temperature through a Berkovich indenter at a prescribed load of 100 mN and a holding time of 10 s. The nanoindentation result showed that the nanohardness and elastic modulus characteristics increased as the TaN addition increased but exhibited a slight drop when the reinforcement was beyond 8 wt.%. At increasing TaN addition, the yield strain (HEr), yield pressure (H3Er2), and elastic recovery index (WeWt) increased, while the plasticity index (WpWt) and the ratio of plastic and elastic work (RPE) reduced. The best mechanical properties were attained at the 8 wt.%TaN addition.

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Section: Introductionmentioning

confidence: 99%

Nanoindentation and Structural Analysis of Sintered TiAl(100−x)-xTaN Composites at Room Temperature

2023

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“…In most cases, a reinforcing phase was homogeneously distributed in the intermetallic matrix. TiC [18,19,20], Ti 2 AlC [20,21,22], TiB 2 [23], and SiC [24,25] as well as different oxides [18] and nitrides [26,27] have been used as a reinforcement phase. For instance, Yue et al [19] showed that the addition of 5 vol% TiC to γ-TiAl alloy increased its crack grow resistance by almost 45%.…”

Section: Introductionmentioning

confidence: 99%

Ceramic-Reinforced γ-TiAl-Based Composites: Synthesis, Structure, and Properties

et al. 2019

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In this study, new multilayer TiAl-based composites were developed and characterized. The materials were produced by spark plasma sintering (SPS) of elemental Ti and Al foils and ceramic particles (TiB2 and TiC) at 1250 °C. The matrix of the composites consisted of α2-TiAl and γ-TiAl lamellas and reinforcing ceramic layers. Formation of the α2 + γ structure, which occurred via a number of solid–liquid and solid–solid reactions and intermediate phases, was characterized by in situ synchrotron X-ray diffraction analysis. The combination of X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and energy dispersive X-ray (EDX) analysis revealed that an interaction of TiC with Ti and Al led to the formation of a Ti2AlC Mn+1AXn (MAX) phase. No chemical reactions between TiB2 and the matrix elements were observed. The microhardness, compressive strength, and creep behavior of the composites were measured to estimate their mechanical properties. The orientation of the layers with respect to the direction of the load affected the compressive strength and creep behavior of TiC-reinforced composites. The compressive strength of samples loaded in the perpendicular direction to layers was higher; however, the creep resistance was better for composites loaded in the longitudinal direction. The microhardness of the composites correlated with the microhardness of reinforcing components.

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“…These improvements are attributed to the fine-grain strengthening and the stable interface between TiAl and Ti 2 AlC. The interface atomic structures as well as crystallographic orientation relationships between the Ti 2 AlN particles and the TiAl matrix of the TiAl/Ti 2 AlN composite were investigated by Liu et al 21 Their results indicated the possibility of a stable interface between the TiAl matrix and the Ti 2 AlN particles. MAX phase solid solutions can be formed on either the M, A, or X sites, offering great potential for optimizing the material properties.…”

Section: Introductionmentioning

confidence: 99%

“…Advanced TiAl alloys have been regarded as the next-generation lightweight structural materials in the aviation and automobile industries due to their attractive mechanical properties and good oxidation resistance. − However, the inherent brittleness of the alloys at room temperature restricted their practical applications. − Over the last decades, many studies have been carried out to improve the mechanical properties and toughness of TiAl alloys, such as heat treatment, , alloying, − and composite technology. − Clemens et al reported that the grain size of the γ-TiAl alloy can be significantly refined by heat-treatments due to the suppression of the α → α + γ transformation. Numerous research studies on alloying have been performed to improve the TiAl alloy properties by adding both metallic (Nb, Cr, Mn, Ni, W) − and nonmetallic (B, Si) , alloying elements, which can further improve the mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

“…M n +1 AX n phases, abbreviated as MAX phases (where M represents transition metal elements, A represents A-group (IIIA or IVA) elements, and X is C or N), possess both metallic and ceramic characteristics with unique properties , and have been proved to be appropriate phases to reinforce the TiAl alloy. Ti 2 AlC , and Ti 2 AlN , are the most well studied MAX phases used for the reinforcement of TiAl alloys. − Our previous studies , have reported that the microhardness and compressive strength of TiAl alloys can be remarkably improved by in situ-synthesized TiAl/Ti 2 AlC composites. These improvements are attributed to the fine-grain strengthening and the stable interface between TiAl and Ti 2 AlC.…”

Section: Introductionmentioning

confidence: 99%

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Ti₂Al(C, N) Solid Solution Reinforcing TiAl-Based Composites: Evolution of a Core–Shell Structure, Interfaces, and Mechanical Properties

Song

Cui

Han

et al. 2018

ACS Appl. Mater. Interfaces

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In this work, TiAl(C, N) solid solution with lamellar structure-enhanced TiAl matrix composites was synthesized by vacuum arc melting, using bulk g-CN, Ti, and Al powders as raw materials. The phases, microstructures, interfaces, and mechanical properties were investigated. MAX phase of TiAl(C, N) solid solution with lamellar structure was formed. During the melting process, first, CN reacted with Ti to form Ti(C, N) by Ti + CN → Ti(C, N). Then TiAl(C, N) was formed by a peritectic reaction of TiAl(l) + Ti(C, N)(s) → TiAl(C, N). CN is the single reactant that provides C and N simultaneously to final product of TiAl(C, N). The interfaces of TiAl//TiAl(C, N) and TiAl(C, N)//Ti(C, N) display perfect orientation relationships with low misfit values. The microhardness, compressive strength, and strain of best-performing TiAl-10 mol % TiAl(C, N) composite were improved by 45%, 55.7%, and 50% compared with the TiAl alloy, respectively. Uniformly distributed TiAl(C, N) and unreacted Ti(C, N) particles contributed to the grain refinement and reinforcement of the TiAl matrix. Laminated tearing, particle pull-out, and the crack-arresting of TiAl(C, N) are crucial for the improvement in compressive strength and plasticity of the composites.

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Investigation on the crystallographic orientation relationships and interface atomic structures in an in-situ Ti2AlN/TiAl composite

Cited by 33 publications

References 44 publications

Nanoindentation and Structural Analysis of Sintered TiAl(100−x)-xTaN Composites at Room Temperature

Nanoindentation and Structural Analysis of Sintered TiAl(100−x)-xTaN Composites at Room Temperature

Ceramic-Reinforced γ-TiAl-Based Composites: Synthesis, Structure, and Properties

Ti₂Al(C, N) Solid Solution Reinforcing TiAl-Based Composites: Evolution of a Core–Shell Structure, Interfaces, and Mechanical Properties

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Investigation on the crystallographic orientation relationships and interface atomic structures in an in-situ Ti2AlN/TiAl composite

Cited by 33 publications

References 44 publications

Nanoindentation and Structural Analysis of Sintered TiAl(100−x)-xTaN Composites at Room Temperature

Nanoindentation and Structural Analysis of Sintered TiAl(100−x)-xTaN Composites at Room Temperature

Ceramic-Reinforced γ-TiAl-Based Composites: Synthesis, Structure, and Properties

Ti2Al(C, N) Solid Solution Reinforcing TiAl-Based Composites: Evolution of a Core–Shell Structure, Interfaces, and Mechanical Properties

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Product

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Ti₂Al(C, N) Solid Solution Reinforcing TiAl-Based Composites: Evolution of a Core–Shell Structure, Interfaces, and Mechanical Properties