Layered Metal-intermetallic Composites in Ti-Al System: Strength Under Static and Dynamic Load

Пацелов, А. М.; Greenberg, B. A.; Gladkovsky, S. V.; Lavrikov, R. D.; Borodin, E. M.

doi:10.1016/j.aasri.2012.11.019

Cited by 21 publications

(6 citation statements)

References 4 publications

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“…Создание микроструктуры материалов, ориентированной на определенный набор структурных и функциональных свойств, является актуальной задачей материаловедения. Из множества интерметаллидных соединений можно выделить алюминиды титана Ti-Al, которые нуждаются в повышении их температурной устойчивости к окислению и деформации [2][3][4]. Сплавы на основе титана с другими легкими элементами (Mg, Si и др.)…”

Section: введение введениеunclassified

Fabrication of (Ti-Al-Si)/(Ti-C)/Ti – layered alloy by SHS pressing

Лазарев

Busurina

Gryadunov

et al. 2023

Izv. VUZ. Poroshk. Met.

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A metal-carbide-intermetallic material based on combustion products of the layer system (Ti-Al-Si)/(Ti-C)/Ti was for the first time obtained with the help of self-propagating high-temperature synthesis (SHS) combined with pressing. Exothermic synthesis from elementary powders was carried out at a pressure of 10 MPa, and pressing of the hot synthesis product was carried out at a pressure of 100 MPa. It has been shown that SHS pressing contributes to the formation of permanent joints of «metal/carbide/intermetallic» layers. The main features of microstructure formation, phase composition, and strength properties of transition zones at the boundary between reacting SHS compositions, Ti-C and Ti-Al-Si and Ti-metal substrate are investigated. It is shown that during SHS reaction, a homogeneous microstructure of Ti-C and Ti-Al-Si layers with an insignificant content of cracks and pores is formed. The thickness of the transition zone between the layers was at least 15 µm. The main phase formed in the combustion product of Ti-Al-Si layer is, according to the results of X-ray phase analysis, triple phase Ti20Al3Si9, the content of which, calculated by the Rietveld method, was at least 87 wt. %. In addition, the combustion product contains a secondary phase of Ti3Al in the amount of 13 wt. %. The energy dispersion analysis revealed that diffusion of aluminium through the titanium carbide layer into the titanium substrate to a depth of approx. 30 µm is observed. Microhardness value of the combustion product of Ti-Al-Si layer was about 10 GPa. The rectilinear nature of crack propagation in the synthesized combustion product of Ti-Al-Si layer, as well as the Palmquist crack resistance coefficient varying within 5.1-5.7 MPa·m1/2, indicate the fragility of the material.

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Section: введение введениеunclassified

Fabrication of (Ti-Al-Si)/(Ti-C)/Ti – layered alloy by SHS pressing

Лазарев

Busurina

Gryadunov

et al. 2023

Izv. VUZ. Poroshk. Met.

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“…However, its applications are restricted by its low mechanical strength and low reaction efficiency due to non-self-sustaining reactions. Many energetic components, such as hydrides [ 8 , 9 , 10 , 11 ], active metals [ 12 , 13 , 14 ], and oxides, have been introduced to PTFE/Al to enhance its energy release characteristics. Among them, the effects of adding oxides on the energy release characteristics of PTFE/Al has received much attention from scholars due to the excellent reaction performance and various reaction characteristics of thermite (Al/oxide).…”

Section: Introductionmentioning

confidence: 99%

Controlling Shock-Induced Energy Release Characteristics of PTFE/Al by Adding Oxides

et al. 2022

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Polytetrafluoroethylene (PTFE)/aluminum (Al)-based energetic material is a kind of energetic material with great application potential. In this research, the control of the shock-induced energy release characteristics of PTFE/Al-based energetic material by adding oxides (bismuth trioxide, copper oxide, molybdenum trioxide, and iron trioxide) was studied by experimentation and theoretical analysis. Ballistic impact experiments with impact velocity of 735~1290 m/s showed that the oxides controlled the energy release characteristics by the coupling of impact velocities and oxide characteristics. In these experiments, the overpressure characteristics, including the quasi-static overpressure peak, duration, and impulse, were used to characterize the energy release characteristics. It turned out that when the nominal impact velocity was 735 m/s, the quasi-static overpressure peak of PTFE/Al/MoO3 (0.1190 MPa) was 1.99 times higher than that of PTFE/Al (0.0598 Mpa). Based on these experimental results, an analytical model was developed indicating that the apparent activation energy and impact shock pressure dominated the energy release characteristic of PTFE/Al/oxide. This controlling mechanism indicated that oxides enhanced the reaction after shock wave unloading, and the chemical and physical properties of the corresponding thermites also affected the energy release characteristics. These conclusions can guide the design of PTFE-based energetic materials, especially the application of oxides in PTFE-based reactive materials.

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“…In recent years, laminated metal composites (LMCs) that combine the superior features of different metals have gained considerable attention as they improves properties such as high strength, stiffness, and toughness [1,2,3,4,5]. In particular, the titanium–titanium tri-aluminide (Ti-Al3Ti) composite system is a great candidate for structural applications due to the combination of high strength, stiffness, and toughness at a lower density of monolithic titanium.…”

Section: Introductionmentioning

confidence: 99%

Formability of Ultrasonically Additive Manufactured Ti-Al Thin Foil Laminates

2019

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This study investigates the effect of strain rates and temperatures on the mechanical behavior of ultrasonically consolidated Titanium–Aluminum thin foils to understand and characterize their formability. To this goal, laminated composite samples with a distinct number of layers were bonded using ultrasonic consolidation. Then, tensile and biaxial hydraulic bulge tests at different strain rates and temperature conditions were conducted. The effect of the sample orientation on the mechanical response was also examined. Tensile and hydraulic bulge tests results were compared to observe differences in ultimate tensile strength and strain levels under uniaxial and biaxial loading conditions. The effects of loading condition, strain rate, and temperature on the material response were analyzed and discussed on the basis of test results. In general, it was concluded that the maximum elongation values attained were higher for the samples subtracted along the sonotrode movement direction compared to those obtained from the normal to sonotrode movement direction. The elongation was obtained as high as 46% for seven bi-layered samples at high-temperature ranges of 200–300 °C. Hydraulic bulge test results showed that elongation improved as the number of bi-layers increased, yet the ultimate strength values did not change significantly indicating an expansion of the formability window.

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Layered Metal-intermetallic Composites in Ti-Al System: Strength Under Static and Dynamic Load

Cited by 21 publications

References 4 publications

Fabrication of (Ti-Al-Si)/(Ti-C)/Ti – layered alloy by SHS pressing

Fabrication of (Ti-Al-Si)/(Ti-C)/Ti – layered alloy by SHS pressing

Controlling Shock-Induced Energy Release Characteristics of PTFE/Al by Adding Oxides

Formability of Ultrasonically Additive Manufactured Ti-Al Thin Foil Laminates

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