https://docs.lib.purdue.edu/cgi/viewcontent.cgi?article=1037&context=mepubs

Additive manufacturing of Ti6Al4V alloy: A review

Thermophysical Properties Research Literature Retrieval Guide Edited by Y. S. Touloukian, J. K. Gerritsen and N. Y. Moore Second edition, revised and expanded. Book 1: Pp. xxi + 819. Book 2: Pp.621. Book 3: Pp. ix + 1315. (New York: Plenum Press, 1967.) n.p.

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Heat and Mass Transfer

https://tandfonline.com/doi/pdf/10.1080/14686996.2017.1361305

Additive manufacturing of metals: a brief review of the characteristic microstructures and properties of steels, Ti-6Al-4V and high-entropy alloys

Graded microstructure and mechanical properties of additive manufactured Ti–6Al–4V via electron beam melting

Investigation of the benefits of plasma deposition for the additive layer manufacture of Ti–6Al–4V

The effect of microstructure on the mechanical properties of two-phase titanium alloys

The main types of microstructure are (1) lamellar – formed after slow cooling when deforma‐ tion or heat treatment takes place at a temperature in the single-phase β-field above the socalled beta-transus temperature Tβ (at which the α+β→β transformation takes place), consisting of colonies of hexagonal close packed (hcp) α-phase lamellae within large body centered cubic (bcc) β-phase grains of several hundred microns in diameter, and (2) equiaxed – formed after deformation in the two-phase α+β field (ie, below Tβ), consisting of globular α-phase dispersed in β-phase matrix [7-8]

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Microstructure and Mechanical Properties of High Strength Two-Phase Titanium Alloys

Phase transformations the effects of which are used in manufacturing processes of structural elements made of two-phase titanium alloys are discussed in the chapter. In order to describe the effect of microstructure on mechanical properties of titanium alloys, phase constituents of microstructure and possible phase compositions too were characterized. Authors presented methods of developing of microstructure and analyzed factors determining technological properties of titanium alloys, like hot plasticity (including superplasticity).

Phase Transformations and Characterization of α + β Titanium Alloys

It is generally accepted that fine-grained and equiaxed microstructure enables superplastic forming of two-phase titanium alloys. Appropriate microstructure is usually developed in the thermomechanical process with careful selection of the parameters of plastic deformation and heat treatment. The results of previous studies proved that β solution treatment preceding plastic deformation in thermomechanical process distinctly increased superplasticity of Ti–6Al–4V alloy despite the fact that obtained microstructure considerably differed from equiaxed one. In current studies fine-grained microstructure of the Ti–6Al–4V alloy was obtained by several variants of thermomechanical process. It was found that the alloy after thermomechanical process comprising β solution treatment followed by forging in α+β temperature range exhibited high superplastic deformability. Metallographic examination of the alloy was carried out at various stages of superplastic tensile test in order to analyse microstructure evolution during superplastic deformation. Tensile tests were interrupted at the strain values corresponding to characteristic points of stress–strain curve, i.e. maximum and steady-state plastic flow stress. Digital image analysis was employed to quantify the changes of strereological parameters of the microstructure of Ti–6Al–4V alloy. The effect of spheroidization and growth of α grains on superplastic behaviour of the alloy was identified.

Waldemar Ziaja

Papers

The effect of microstructure on the mechanical properties of two-phase titanium alloys

Microstructure and Mechanical Properties of High Strength Two-Phase Titanium Alloys

The effect of microstructure on the mechanical properties of two-phase titanium alloys

Phase Transformations and Characterization of α + β Titanium Alloys

Microstructural aspects of superplasticity in Ti–6Al–4V alloy