Effect of Hypoeutectic Boron Addition on the β Transus of Ti-6Al-4V Alloy

Roy, Shibayan; Tungala, Vedavyas; Suwas, Satyam

doi:10.1007/s11661-011-0807-8

Cited by 24 publications

(6 citation statements)

References 21 publications

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“…The β-transus temperature was found to be T E920°C for both CP-Ti and Ti-0.2B. Note that a weak influence of minor boron additions on the β-transus temperature was earlier shown in Ti-6-4 [20].…”

Section: Resultsmentioning

confidence: 68%

Effect of boron addition on formation of a fine-grained microstructure in commercially pure titanium processed by hot compression

Imayev

Gaisin

Imayev

2015

Materials Science and Engineering: A

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Section: Resultsmentioning

confidence: 68%

Effect of boron addition on formation of a fine-grained microstructure in commercially pure titanium processed by hot compression

Imayev

Gaisin

Imayev

2015

Materials Science and Engineering: A

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“…The argument for this material selection is that, a well ‐ established property database already exists for different microstructures including the bimodal one . The α / β transus temperature was measured to be ≈1040 °C for this alloy . Sub ‐ β transus TMT was performed by hot ‐ rolling the alloy at 700 °C up to 90% thickness reduction, followed by isothermal annealing at 900 °C for 90 min in argon atmosphere, to produce the bimodal microstructure .…”

Section: Materials and Experimental Methodsmentioning

confidence: 99%

Indentation Response and Structure‐Property Correlation in a Bimodal Ti–6Al–4V Alloy

2017

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Understanding the deformation behavior of multi-phase alloys under external loading requires careful mechanical characterization of the individual constituent phases at various length scales. The present study first evaluates the elastic moduli and hardness of the microstructural constituents viz. primary a (a p ) and transformed b (secondary a (a s ) plus retained prior b) phases in a bimodal Ti-6Al-4V alloy by nanoindentation using different loads. The bulk mechanical properties of the overall microstructure are then determined by grid wise nano-indentation, as well as micro-indentation. The alloy shows a pronounced indentation size effect; the hardness increases with the decrease in indentation load, or depth of penetration. Assuming an iso-stress condition for individual constituents (a p and transformed b) in the rule of mixture approach, the bulk mechanical properties of the Ti-6Al-4V alloy are reasonably predicted. Such prediction of bulk properties, however, is not possible when a similar calculation is performed using iso-strain condition. The transformed b phase shows disparity between the estimated and experimental values, while considering the a s and b phases individually, on both iso-stress and iso-strain assumptions. From these results, the influence of individual microstructural phases (size, distribution, volume fraction, morphology) and the interfaces between them, is found key in controlling the overall bulk mechanical response of the alloy system. KeywordsNano and micro-indentation, bimodal Ti-6Al-4V, indentation size effect, rule of mixture, iso-stress and iso-strain, grain boundary and interface

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“…As a result, the primary ¡ phase may start to form near boride particles during cooling from the ¢ phase region at high temperature above general ¢transus for Ti-17, because oxygen is a strong ¡ stabilizing element. 8,9) In general, scavenging effect can be obtained by the addition of alloying element whose affinity for oxygen is stronger than base element. In the case of titanium alloys, rare earth elements are employed as the alloying element for scavenging oxygen.…”

Section: Mechanical Testsmentioning

confidence: 99%

“…6) A unique method using oxygen scavenging by boride particles has also been proposed for inhibiting the formation of grain boundary ¡ in titanium alloys. 8,9) The solid solubility of boron (B) is limited to a low concentration at any temperature, and thus almost all B included in titanium alloys is precipitated as boride particles. These boride particles are formed during solidification by a eutectic reaction with Ti.…”

Section: Introductionmentioning

confidence: 99%

Suppression of Grain Boundary α Formation by Addition of Silicon in a Near-β Titanium Alloy

et al. 2019

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The effect of Si addition on the microstructure and mechanical properties of a near-¢ titanium alloy Ti-17 with fully lamella microstructure was investigated. It was found that the microstructure of Ti-17 with silicon exhibited the absence of a continuously thick ¡ layer along prior-¢ grain boundaries (grain boundary ¡), while the grain boundary ¡ was distinctively formed in Ti-17 without Si. The formation of (Ti, Zr) silicide particles at the prior-¢ grain interior and its grain boundaries were observed, and the presence of these particles were related to the disappearance of grain boundary ¡ similar to the oxygen scavenging effect of boride particles reported previously. With regard to mechanical properties, Ti-17 with silicon exhibits higher strength and lower ductility compared with Ti-17 without Si. Ductile transgranular fracture morphology was observed even on the fracture surface of Ti-17 with Si after tensile test. [

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Effect of Hypoeutectic Boron Addition on the β Transus of Ti-6Al-4V Alloy

Cited by 24 publications

References 21 publications

Effect of boron addition on formation of a fine-grained microstructure in commercially pure titanium processed by hot compression

Effect of boron addition on formation of a fine-grained microstructure in commercially pure titanium processed by hot compression

Indentation Response and Structure‐Property Correlation in a Bimodal Ti–6Al–4V Alloy

Suppression of Grain Boundary α Formation by Addition of Silicon in a Near-β Titanium Alloy

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