Structure evolutions in a Ti–6Al–4V matrix composite reinforced with TiB, characterised using high energy X-ray diffraction

Ropars, Ludovic; Dehmas, Moukrane; Gourdet, Sophie; Delfosse, Jérôme; Tricker, David; Aeby‐Gautier, Elisabeth

doi:10.1016/j.jallcom.2014.10.203

Cited by 18 publications

(7 citation statements)

References 30 publications

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“…We observed the surfaces of the Ti‐6Al‐4 V alloy and Ti6Al4V‐TiB 10 vol% composites by FE‐SEM to understand this unique fracture behavior at each point (A, B, and C), as shown in Figure . Note that the needle‐like crystals were TiB whiskers, the gray zone was the α phase of the Ti6Al4V alloy matrix and the white streaks were the β phase of the Ti6Al4V alloy matrix (see Figure A,B) . It seemed that the TiB whiskers were homogeneously dispersed in a three‐dimensional random orientation in the Ti‐6Al‐4 V alloy matrix.…”

Section: Resultsmentioning

confidence: 97%

Crack initiation behavior of titanium boride whisker reinforced titanium matrix composites during small punch testing

Kurita

Sakayanagi

Kikuchi

et al. 2019

Mat Design & Process Comms

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TiB whisker reinforced Ti matrix composites are potential aerospace materials due to their outstanding specific tensile properties. However, it is necessary to enhance their fracture toughness for their practical realization. In this study, we investigate the crack initiation behavior on the surface of TiB whisker reinforced Ti-6Al-4 V alloy matrix (Ti6Al4V-TiB) composites under tensile loading during small punch testing. It is revealed that initial cracks of the Ti6Al4V-TiB composite occur from the fracture of TiB whiskers, and these cracks are united after propagating in the β phase of the Ti-6Al-4 V alloy matrix.KEYWORDS metal-matrix composites, crack propagation, Ti-6Al-4 V

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Section: Resultsmentioning

confidence: 97%

Crack initiation behavior of titanium boride whisker reinforced titanium matrix composites during small punch testing

Kurita

Sakayanagi

Kikuchi

et al. 2019

Mat Design & Process Comms

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“…Figure 2 shows the XRD patterns of the SPS compacts consolidated at each temperature. The peaks of the TiB 2 (100) and (101) planes decreased, whereas the peaks of the TiB (102) and (210) planes increased between the SPS compacts at 800 and 900 °C, suggesting a dramatic progression of the reaction Ti+TiB2→2TiB from 800 to 900 °C [21]. No peaks were observed for the TiB 2 (100) and (101) planes in the SPS compacts at 1100 °C, even though detectable peaks were present in the SPS compacts at 900 and 1000 °C.…”

Section: Resultsmentioning

confidence: 99%

Strengthening Mechanism of Titanium Boride Whisker-Reinforced Ti-6Al-4V Alloy Matrix Composites with the TiB Orientation Perpendicular to the Loading Direction

et al. 2019

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We fabricated fully dense titanium boride (TiB) whisker-reinforced Ti-6Al-4V alloy matrix (Ti6Al4V-TiB) composites, with a homogeneous dispersion, a TiB orientation perpendicular to the loading direction (; two-dimensional random direction) and an intimate Ti/TiB interface without an intermediate interfacial layer in the Ti-6Al-4V alloy matrix, by spark plasma sintering. Microstructural analysis allows us to present the tensile properties of the Ti6Al4V-TiB composites with the theories for discontinuous fiber-reinforced composites. The Ti6Al4V-TiB 10 vol.% composite yielded a Young’s modulus of 130 GPa, an ultimate tensile strength (UTS) of 1193 MPa and an elongation of 2.8%. The obtained experimental Young’s modulus and UTS of the Ti6Al4V-TiB composites were consistent with the theoretical values estimated by the Halpin-Tsai and Shear-lag models. The good agreement between our experimental results and these models indicates that the TiB whiskers behave as discontinuous fibers in the Ti-6Al-4V alloy matrix.

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“…Particle-reinforced metal matrix composites (PRMMCs) are regarded as one of the alternatives to overcoming the performance defects of metals under impacting loads. However, conventional fabrication methods for PRMMCs-including powder metallurgy [10] mechanical alloying [11], self-propagation high-temperature synthesis [12], etc.-often have various shortcomings, such as interface cracks, segregation, etc. Recently, the continuous development of additively manufactured particle-reinforced Ti-based composite to foster their industrial adoption relies on achieving properties superior to the counterparts fabricated using conventional methods [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Compressive Properties and Failure Mechanism of the Laser Powder Bed Fusion of Submicro-LaB6 Reinforced Ti-Based Composites

Li,

Liu

2023

Micromachines

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In this study, lanthanum hexaboride (LaB6) particle-reinforced titanium matrix composites (PRTMCs, TC4/LaB6) were successfully manufactured using the laser powder bed fusion (LPBF) process. Thereafter, the effect of the mass fraction of LaB6 on the microstructure and the dynamic compressive properties was investigated. The results show that the addition of LaB6 leads to significant grain refinement. Moreover, the general trend of grain size reveals a concave bend as the fraction increases from 0.2% to 1.0%. Furthermore, the texture intensity of prior β grains and α grains was found to be weakened in the composites. It was also observed that the TC4/LaB6 have higher quasi-static and dynamic compressive strengths but lower fracture strain when compared with the as-built TC4. The sample with 0.5 wt.% LaB6 was found to have the best strength–toughness synergy among the three groups of composites due to having the smallest grain size. Furthermore, the fracture mode of TC4/LaB6 was found to change from the fracture under the combined action of brittle and ductility to the cleavage fracture. This study was able to provide a theoretical basis for an in-depth understanding of the compressive properties of additive manufacturing of PRTMCs under high-speed loading conditions.

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Structure evolutions in a Ti–6Al–4V matrix composite reinforced with TiB, characterised using high energy X-ray diffraction

Cited by 18 publications

References 30 publications

Crack initiation behavior of titanium boride whisker reinforced titanium matrix composites during small punch testing

Crack initiation behavior of titanium boride whisker reinforced titanium matrix composites during small punch testing

Strengthening Mechanism of Titanium Boride Whisker-Reinforced Ti-6Al-4V Alloy Matrix Composites with the TiB Orientation Perpendicular to the Loading Direction

Dynamic Compressive Properties and Failure Mechanism of the Laser Powder Bed Fusion of Submicro-LaB6 Reinforced Ti-Based Composites

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