Effect of boron on the structure and mechanical properties of Ti–6Al and Ti–6Al–4V

Bilous, O.O.; Artyukh, L. V.; Bondar, A. А.; Velikanova, Т. Ya.; Burka, M.P.; Brodnikovs’kyi, M. P.; Fomichov, O.S.; Tsyganenko, N.I.; Firstov, S. О.

doi:10.1016/j.msea.2005.05.011

Cited by 42 publications

(16 citation statements)

References 10 publications

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“…[19] The supersaturated B increased the b transus by about 60°C relative to ELI Ti64. A lower b transus of 935°C was measured in cast Ti64-B alloys that contained around 0.1O, [20] so that a range of ±60°C relative to the b transus of ELI Ti64 has been measured previously in Ti64-B alloys with low O. In the present work, DTA heating curves for Ti64 with 0.5B, 1.55B, and 1.65B are shown in Figure 12.…”

Section: Beta Transussupporting

confidence: 56%

Processing, Microstructure, Texture, and Tensile Properties of the Ti-6Al-4V-1.55B Eutectic Alloy

Ивасишин

Teliovych

Ivanchenko

et al. 2007

Metall Mater Trans A

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Processing, Microstructure, Texture, and Tensile Properties of the Ti-6Al-4V-1.55B Eutectic Alloy OREST M. IVASISHIN, ROMAN V. TELIOVYCH, VOLODYMYR G. IVANCHENKO, SESHACHARYULU TAMIRISAKANDALA, and DANIEL B. MIRACLE Boron (B) addition to conventional titanium (Ti) alloys instigates precipitation of intermetallic TiB whiskers that provide significant increases in strength and stiffness. The eutectic composition is the maximum boron concentration that provides these benefits via melt processing while maintaining reasonable ductility and damage tolerance. The eutectic point for the most widely used Ti alloy, Ti-6Al-4V (wt pct), modified with B, was determined to occur at 1.55 ± 0.05B and 1545 ± 5°C. The microstructure, texture, and tensile properties of the eutectic alloy are sensitive to ingot solidification conditions and melt pool morphology. Several microstructural forms in the as-cast condition as well as their transformation during thermomechanical processing (TMP) were identified. Two types of eutectic structures, aligned and random, were obtained. Cast microstructures with random eutectic colony orientation had no marked crystallographic texture, while cast aligned microstructure had a strong [020] texture for the TiB phase and a 110 h i circular texture for the a-Ti phase. As-cast microstructure could be significantly modified via TMP. Fragmentation of TiB occurred during three-dimensional (3-D) forging and aligned microstructures were produced after rolling or extrusion. An attractive balance of strength and ductility was obtained after solution treatment in the full b condition followed by aging. The microstructure of the Ti-6Al-4V-1.55B eutectic alloy can be controlled to tailor the property combinations.

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Section: Beta Transussupporting

confidence: 56%

Processing, Microstructure, Texture, and Tensile Properties of the Ti-6Al-4V-1.55B Eutectic Alloy

Ивасишин

Teliovych

Ivanchenko

et al. 2007

Metall Mater Trans A

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“…[18] shows a miscibility gap of the liquid phase. This is in contradiction with experimental data on the liquidus surface [19][20][21][22][23].…”

Section: Introductioncontrasting

confidence: 95%

“…[20,22,23] systematically studied the Ti-TiB-Ti 0.65 Al 0.35 region of the phase diagram by DTA, aiming to assess the influence of Al additions on the melting behaviour and the range of solid-state transformations down to 1073 K. The results show that boron additions decrease the ␣ → ␤ transition as well as the solidus temperatures of ternary alloys when comparing them to the boron-free binary alloys. Using the DTA results, the projections of the liquidus and solidus surfaces were constructed: the liquidus surface reveals TiB 2 , Ti 3 B 4 , TiB, ␣, ␤, ␥, etc.…”

Section: Introductionmentioning

confidence: 99%

The Al–B–Nb–Ti system

Witusiewicz

Bondar

Hecht

et al. 2009

Journal of Alloys and Compounds

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“…Research shows that the dynamic compressive mechanical properties of Ti-64A alloy depend on the alloy composition, organizational status, composition and distribution of microscopic characteristics [4][5][6][7][8]. In addition to refined as-cast microstructure [9][10][11][12][13][14] also affects dynamic performance by 0.1wt% Boron addition. The present study is mainly devoted to understand 0.1wt% Boron addition Effect on dynamic compressive mechanical properties of Ti-64A alloy with different microstructures.…”

Section: Introductionmentioning

confidence: 99%

0.1wt% Boron addition Effect on dynamic compressive mechanical properties of Ti-6Al-4V alloy

Song

et al. 2016

MATEC Web Conf.

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0.1wt% Boron addition effect on dynamic compression properties of Ti-6Al-4V (Ti-64A) alloy are investigated by Split Hopkinson Pressure Bar (SHPB). In the study, and relative damage mechanism is also analyzed. The results show that, as-cast microstructure is refined due to 0.1% Boron addition and also to lower the non-uniform distribution of strain, stress or local concentration due to inharmonic deformation. As well as both dynamic strain and average dynamic flow stress is improved with a reduction of the sensitivity of adiabatic shear behavior. As deformation microstructure loaded at high strain rate with 0.1wt% boron addition, Dynamic strain and maximum absorbed energy is decrease 10%~30% compare with Ti-64A alloy. Both Ti-64A and Ti-6Al-4V-0.1B (Ti-64B), average dynamic flow stress is close. At high speed impact load, it exhibits a damage of adiabatic shear and TiB phases bear loading during fracture. Adiabatic shear band is main reason of Ti-64A and Ti-64B alloys fracture failure through the deformed specimens' microstructure observation. Adiabatic shear band formation and expansion is a precursor of material shear fracture failure. Deformation cavity can be formation between TiB phase and matrix during the deformation process, but not the main reason of material fracture failure.

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Effect of boron on the structure and mechanical properties of Ti–6Al and Ti–6Al–4V

Cited by 42 publications

References 10 publications

Processing, Microstructure, Texture, and Tensile Properties of the Ti-6Al-4V-1.55B Eutectic Alloy

Processing, Microstructure, Texture, and Tensile Properties of the Ti-6Al-4V-1.55B Eutectic Alloy

The Al–B–Nb–Ti system

0.1wt% Boron addition Effect on dynamic compressive mechanical properties of Ti-6Al-4V alloy

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