Hot compression characteristics of TiBw/Ti6Al4V composites with novel network microstructure using processing maps

Huang, Lujun; Zhang, Y.Z.; Li, Geng; Wang, B.; Ren, Wei

doi:10.1016/j.msea.2013.05.039

Cited by 38 publications

(11 citation statements)

References 26 publications

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“…These test conditions strongly influence the mechanical behavior of the material. And each particular starting microstructure may induce complex mechanisms as grain growth [8,9,10], dynamic recrystallization [11,12,13], cavity and void nucleation [14,15,16] in addition with grain boundary sliding [17], each mechanism respectively suggesting hardening, softening or damage.…”

Section: Introductionmentioning

confidence: 99%

Behavior modeling and microstructural evolutions of Ti–6Al–4V alloy under hot forming conditions

Velay

Matsumoto

Vidal

et al. 2016

International Journal of Mechanical Sciences

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Ti-6Al-4V alloy is widely used in superplastic forming process. The conventional conditions require high forming temperatures (T ≥ 900 • C) and low strain rates (ε ≤ 10 −3 s −1). In order to reduce the costs of the industrial process, recent investigations focus on the micro-structural refinement of the material. It allows an improvement of the forming conditions which makes lower forming temperatures and higher strain rates eligible whereas low strain rates (ε ≤ 10 −3 s −1) and high temperatures (T ≥ 800 • C) are particularly suitable for conventional superplastic forming conditions. However, the mechanical response of the Titanium alloy strongly depends on the starting micro-structure considered and on its evolution with the temperature and the deformation. The objective of the present investigation is to observe the micro-structural evolutions of Ti-6Al-4V alloy under thermal and mechanical loadings from different starting micro-structures. Hence, an internal grain growth variable is identified by the use of these observations. Then, it is introduced into the behavior model and its influence on the mechanical response of the material is analysed. The final constitutive equations are able to take into account viscosity, strain hardening and grain size evolution for a wide range of strain rates and forming temperatures (10 −4 s −1 ≤ε ≤ 10 −2 s −1 ; 650 • C ≤ T ≤ 870 • C). Moreover, the model is able to consider several starting microstructures (different initial grain sizes) and to predict their influence on the viscous flow and the strain hardening. At last, some model verifications are conducted to check the validity of the non-isothermal model formulation. Some predictions are also performed by considering several starting microstructures.

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Section: Introductionmentioning

confidence: 99%

Behavior modeling and microstructural evolutions of Ti–6Al–4V alloy under hot forming conditions

Velay

Matsumoto

Vidal

et al. 2016

International Journal of Mechanical Sciences

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“…According to the previous literature [22], the overall section of the forged pancake can be divided into non-deformation region, transition deformation region and homogenous region from the peripheral area to the centre area. The microstructure difference among these areas can be mainly ascribed to inhomogeneous plastic flow during forging.…”

Section: Microstructurementioning

confidence: 99%

The Microstructural Characterization and Mechanical Properties of 5 vol. % (TiBw + TiCp)/Ti Composite Produced by Open-Die Forging

Han

Lü

Zhang

et al. 2018

Metals

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Abstract:In this study, a Ti composite reinforced with 5 vol. % (TiB w + TiC p ) was fabricated by an in situ casting route. Open die forging in (α + β) phase region was conducted on the composite casting. The microstructures of the as-forged composite pancake are inhomogeneous in terms of matrix microstructure and distribution of reinforcements. The matrix grains are gradually refined from the periphery to centre of the pancake. The reinforcements TiB w and TiC p tend to be uniformly distributed in the centre region. It is suggested that the microstructure difference can be mainly ascribed to the temperature variation from the periphery to the centre. The tensile testing results show that the centre region of the composite pancake exhibits higher strength than the peripheral region. The mechanical behaviour of the composite pancake with the temperature is discussed.

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“…According to the previous literature [22], the overall section of the forged pancake can be divided into non-deformation region, transition deformation region and homogenous region from the brim area to the centre area. The microstructure difference among these areas can be mainly ascribed to inhomogeneous plastic flow during forging.…”

Section: Microstructurementioning

confidence: 99%

Microstructural Characterization and Mechanical Properties of 5 vol.% (TiB<sub>w</sub>+TiC<sub>p</sub>)/Ti Composite Produced by Forging

Han¹,

Lu²,

Zhang³

et al. 2018

Preprint

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In this study, a 5vol. % (TiBw+TiCp)/Ti composite pancake with a diameter of 260mm was prepared by casting followed by open die forging in (α+β) phase region. The microstructures of the composite pancake are inhomogeneous, in terms of both matrix microstructure and distribution of reinforcements. The matrix microstructures were gradually refined from the periphery to centre of the pancake. The TiBw and TiCp reinforcements tend to be uniformly distributed in the centre region and. It is suggested that the microstructure difference can be mainly ascribed to the temperature variation from the periphery to the centre. Additionally, tensile testing results showed that the centre region of the composite pancake exhibits higher strength than the peripheral region. The strengthening mechanism and the softening behavior of the composite pancake with temperature is discussed.

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Hot compression characteristics of TiBw/Ti6Al4V composites with novel network microstructure using processing maps

Cited by 38 publications

References 26 publications

Behavior modeling and microstructural evolutions of Ti–6Al–4V alloy under hot forming conditions

Behavior modeling and microstructural evolutions of Ti–6Al–4V alloy under hot forming conditions

The Microstructural Characterization and Mechanical Properties of 5 vol. % (TiBw + TiCp)/Ti Composite Produced by Open-Die Forging

Microstructural Characterization and Mechanical Properties of 5 vol.% (TiB<sub>w</sub>+TiC<sub>p</sub>)/Ti Composite Produced by Forging

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