Effect of Microstructure, Deformation Mode and Rate on Mechanical Behaviour of Electron-Beam Melted Ti–6Al–4V and Ti–1.5Al–6.8Mo–4.5Fe Alloys

Ивасишин, О. М.; Akhonin, S.V.; Savvakin, Dmytro G.; Berezos, V.A.; Bondarchuk, V. I.; Stasyuk, O. O.; Markovsky, P.E.

doi:10.15407/ufm.19.03.309

Cited by 15 publications

(12 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…we represented them on the diagram depending on the specific kinetic energy of the bullets and the thickness of the sheets. just this approach enables comparing the results of tests not only for different materials but also for different fire weapons, and was proposed and used in our previous works [11,25].…”

Section: Generalization Of the Results And Conclusionmentioning

confidence: 99%

See 1 more Smart Citation

Microstructure and Properties of Titanium-Based Materials Promising for Antiballistic Protection

Ивасишин¹,

Markovsky²,

Savvakin³

et al. 2019

Usp. Fiz. Met.

Self Cite

View full text Add to dashboard Cite

titanium-based materials, which combine high strength and hardness of surface layer along with sufficient ductile characteristics of the matrix metal, are very promising for various applications, particularly, as armoured components in military-industrial complex. Above-mentioned combination of properties can be achieved by means of the creation of multilayer structures, which consist of layers possessing different physical and mechanical properties. In the present study, microstructure peculiarities, mechanical and antiballistic protection properties of the layered tibased materials are investigated. two different ways were used for fabrication of such the layered structures. the first one is a conventional metallurgical (ingotwrought) method followed by the surface rapid heat treatment of the ті-6Al-4V and t110 alloys for fabrication of graded structures with different mechanical properties over the material depth. the second one is an elemental powder metallurgy method for fabrication of the structures combining layers of the ti-6Al-4V alloy and composites based on it and hardened with tic or tib particles. ballistic tests of the obtained materials are carried out for different types of projectiles with different kinetic energy and hardness of the core; features of the penetration of the hitting elements are performed depending on the material structural state. It is proved that materials with graded and layered structures demonstrate undeniable advantages in the antiballistic protection characteristics as compared with homogeneous alloys of the same thickness.

show abstract

Section: Generalization Of the Results And Conclusionmentioning

confidence: 99%

“…details of used technological approach are given in refs. [10,11]. Graded structural states were created with SrHt made by induction method [7][8][9] followed by final aging.…”

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

Microstructure and Properties of Titanium-Based Materials Promising for Antiballistic Protection

Ивасишин¹,

Markovsky²,

Savvakin³

et al. 2019

Usp. Fiz. Met.

Self Cite

View full text Add to dashboard Cite

show abstract

“…gas-discharge electron guns (Fig. 1) [20,21]. Commercial pure titanium (Grade 2), A0 grade aluminum, 99% purity molybdenum, technical purity chromium, and ARMCO iron were used as initial components.…”

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

Microstructure and Tensile Properties of Cost-Efficient Thermally Hardenable α + β Alloys of Ti–Al–Mo–Fe and Ti–Al–Mo–Cr Systems

Markovsky

Akhonin

Berezos

et al. 2020

Metallogr. Microstruct. Anal.

Self Cite

View full text Add to dashboard Cite

Four new compositions of titanium alloys of Ti-Al-Mo-Fe and Ti-Al-Mo-Cr systems with content of β-phase stabilizing elements in a range of 3.8-9.8 wt.% (in terms of "molybdenum equivalent" C Mo ) were studied. The alloys were melted by single-melt electron-beam cold hearth technique, thermomechanically processed, and subjected to conventional (in furnace) or continuous rapid (resistant heating by electric current) heat treatments with different regimes. The microstructure, phase composition, and mechanical properties both in as-deformed state and after heat treatments were studied in detail. It is found that the proposed thermomechanical processing allows to obtain a transformed microstructure characterized by nearly equiaxed α-phase particles with relatively small aspect ratio and weak crystallographic texture of a basal type. Subsequent annealing in the α + β field led to completion of the α + β microstructure transformation; a microstructure of globular type was obtained in the low-alloyed (C Mo = 3.8%) material. The phase transformations at various stages of strengthening heat treatments and their influence on the final microstructure and properties were studied, depending on the content of β-stabilizing elements and processing route. Particular attention was paid to the influence of the content of β-stabilizing element on the mechanical properties, as well as to the difference between the alloying systems with iron or chromium. It is shown that the alloys of proposed compositions provide high strength and reliability; they are competitive with conventional commercial alloys in terms of the balance of mechanical properties in hot deformed, annealed, and thermally strengthened states. Strengthening treatment based on rapid heating allows to achieve strength above 1500 MPa with sufficient ductility.

show abstract

“…Besides, a good balance of various mechanical properties of the alloy can be obtained after a number of processing routes, which can be employed for critical products, including aerospace and military applications [6][7][8]. For instance, ballistic testing of T110 sheets with the use of various type of live ammunition showed at least 20-25% higher ballistic resistance compared to the commonly used for this purpose Ti-6Al-4V alloy [6,9,10]. However, the dependence of the mechanical properties of the T110 alloy on the various types of processing and the structure-phase state created by them has been studied to a very limited extent, mainly by standard tensile tests.…”

Section: Introductionmentioning

confidence: 99%

Effect of Strain Rate on Mechanical Behavior and Microstructure Evolution of Ti-Based T110 Alloy

Markovsky

Janiszewski

Bondarchuk

et al. 2021

Metallogr. Microstruct. Anal.

View full text Add to dashboard Cite

Recently developed thermally hardenable medium-level alloyed titanium alloy T110 was studied from the viewpoint of microstructure influence on the mechanical behavior under quasi-static and high-strain rate deformation. The globular microstructures of two types differing in aspect ratio of α-globules were formed under thermomechanical processing conditions with different reductions (ε total = 2, and 3) and final annealing at 850 °C, 3 h. The thermally hardened state was formed by conventional solid-solution treatment at a temperature of two-phase α+β field (880 °C, 45 min), water quenching, and final aging (550 °C, 5 h). Stress-strain dependencies were estimated on tension with strain rates varied from 8•10 −4 to 4•10 −2 s −1 , as well as compression with a strain rate of 10 −3 s −1 (quasi-static) and under high-strain rates varied from 870 s −1 to 3520 s −1 ; the deformation with high-strain rates has been achieved using split Hopkinson pressure bar (SHPB) technique. The tested material was also assessed using strain energy (SE) parameter. A parallel study of the microstructure and crystallographic texture formed during testing allowed to propose a reliable deformation and fracture mechanisms, depending on the stress state (tension, compression) and strain rate. A special role of the initial microstructure is noted, which determines the plasticity of the tested alloy, the sites of pore nucleation, features of crack growth, as well as the localization of deformation, which is determined by the mode and rate of loading. It is established and explained why the best balance of strength and ductility, and thus, the highest SE values in the all tests carried out were ensured by the alloy in the state with a more uniform microstructure of globular morphology (after the rolling with reduction ε total =3), which, in turn, provided general superiority over the widely used Ti-6Al-4V alloy.

show abstract

Effect of Microstructure, Deformation Mode and Rate on Mechanical Behaviour of Electron-Beam Melted Ti–6Al–4V and Ti–1.5Al–6.8Mo–4.5Fe Alloys

Cited by 15 publications

References 27 publications

Microstructure and Properties of Titanium-Based Materials Promising for Antiballistic Protection

Microstructure and Properties of Titanium-Based Materials Promising for Antiballistic Protection

Microstructure and Tensile Properties of Cost-Efficient Thermally Hardenable α + β Alloys of Ti–Al–Mo–Fe and Ti–Al–Mo–Cr Systems

Effect of Strain Rate on Mechanical Behavior and Microstructure Evolution of Ti-Based T110 Alloy

Contact Info

Product

Resources

About