The effect of pre-consolidation heat treatment on TiB morphology and mechanical properties of rapidly solidified Ti-6Al-4V-XB alloys

Fan, Z.; Chandrasekaran, L.; Ward‐Close, C.M.; Miodownik, A. P.

doi:10.1016/0956-716x(95)93210-u

Cited by 31 publications

(15 citation statements)

References 4 publications

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“…Anisotropy in YoungÕs modulus can arise not only from TiB alignment, but also from crystallographic texture of the a and b phases. This additional texture can alter the level of anisotropy, [24] but there is presently insufficient data to assess this effect. The effect of texture on elastic modulus is expected to be even more pronounced after TMP due to evolution of strong deformation textures as compared to the solidification texture.…”

Section: Elastic Modulusmentioning

confidence: 98%

“…Similar values have been reported in the literature from experiments and theoretical predictions on other Ti64-B materials. [9,23,24] Alignment of TiB increases the modulus in the longitudinal direction as a result of more efficient load transfer, but introduces elastic anisotropy. As-cast microstructure with aligned TiB had a modulus of 138 GPa in the longitudinal direction and 127 GPa in the transverse direction.…”

Section: Elastic Modulusmentioning

confidence: 99%

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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: Elastic Modulusmentioning

confidence: 98%

Section: Elastic Modulusmentioning

confidence: 99%

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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“…The TiB particles were produced by an in-situ reaction to form TiB needles. Fan et al [19] found that by undertaking a low temperature (<700 C) heat treatment prior to consolidation, equiaxed TiB particles can be produced. However the equiaxed particles produced by Fan et al were approximately 100 nm in diameter and are likely to cause dispersion strengthening.…”

Section: Rapid Solidificationmentioning

confidence: 99%

“…Rapid solidification (RS) has been used by Fan et al [18,19] to produce melt spun ribbon and by Sastry et al [20] and Soboyejo et al [21] for the production of powder. RS of ribbon has been found to give a metastable product of supersaturated boron in a-Ti solid solution.…”

Section: Rapid Solidificationmentioning

confidence: 99%

Titanium Particulate Metal Matrix Composites - Reinforcement, Production Methods, and Mechanical Properties

Gofrey¹,

Goodwin²,

Ward‐Close³

2000

Adv. Eng. Mater.

114

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“…Previous work has shown that a TiB dispersion can be formed by in-situ reaction from a Ti-B solid solution [21,22] or from a dispersion of either TiB 2 [23,24] or elemental boron particles [25]. TiB usually precipitates as high aspect ratio needles, which although offering significant potential for short fibre reinforcement, are also likely to greatly reduce the ductility of the composite.…”

Section: Application To Development Of Titanium-based Materialsmentioning

confidence: 99%

Non-equilibrium synthesis of new materials

Gardiner¹,

Goodwin²,

Dodd³

et al. 1996

Adv Perform Mater

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Over the last few decades it has become apparent that metallic materials produced by conventional casting processes have reached their limit. Some improvements have been obtained by rapidly cooling bulk alloys but major increases have required the development of rapid solidification processes. However, more radical approaches, such as mechanical alloying (MA) and physical vapour deposition (PVD), are also being explored and these are the subject of this paper. This paper describes the physical basis behind the development of MA and PVD in the Structural Materials Centre and presents the results of some materials development programmes on aluminium, magnesium and titanium based materials.

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The effect of pre-consolidation heat treatment on TiB morphology and mechanical properties of rapidly solidified Ti-6Al-4V-XB alloys

Cited by 31 publications

References 4 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

Titanium Particulate Metal Matrix Composites - Reinforcement, Production Methods, and Mechanical Properties

Non-equilibrium synthesis of new materials

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