Effect of Fe content on microstructures and properties of Ti6Al4V alloy with combinatorial approach

Wu, Di; Zhang, Ligang; Liu, Libin; Bai, Weimin; Zeng, Ling

doi:10.1016/s1003-6326(18)64815-0

Cited by 22 publications

(15 citation statements)

References 36 publications

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“…It can provide effective guidance for alloy design, hence, reducing the number of experiments performed. Additionally, the alloy samples with various constituents can be prepared in a timely way by utilizing high-throughput diffusion couple technology, which can further decrease the number of experiments performed [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Design of Low-Cost and High-Strength Titanium Alloys Using Pseudo-Spinodal Mechanism through Diffusion Couple Technology and CALPHAD

Ding

Zhang

et al. 2021

Materials

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The high cost of development and raw materials have been obstacles to the widespread use of titanium alloys. In the present study, the high-throughput experimental method of diffusion couple combined with CALPHAD calculation was used to design and prepare the low-cost and high-strength Ti-Al-Cr system titanium alloy. The results showed that ultra-fine α phase was obtained in Ti-6Al-10.9Cr alloy designed through the pseudo-spinodal mechanism, and it has a high yield strength of 1437 ± 7 MPa. Furthermore, application of the 3D strength model of Ti-6Al-xCr alloy showed that the strength of the alloy depended on the volume fraction and thickness of the α phase. The large number of α/β interfaces produced by ultra-fine α phase greatly improved the strength of the alloy but limited its ductility. Thus, we have demonstrated that the pseudo-spinodal mechanism combined with high-throughput diffusion couple technology and CALPHAD was an efficient method to design low-cost and high-strength titanium alloys.

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Section: Introductionmentioning

confidence: 99%

Design of Low-Cost and High-Strength Titanium Alloys Using Pseudo-Spinodal Mechanism through Diffusion Couple Technology and CALPHAD

Ding

Zhang

et al. 2021

Materials

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“…Nb is a strong β -isomorphous element that reduces elastic modulus and increases β -phase stability, strength, shape memory effect, and superelasticity of titanium alloy [ 1 , 9 , 10 ]. Fe is a low-cost and a plentiful β -eutectoid element that has been employed as one of the main constituent in high-strength Ti alloys [ 11 ]. It was reported that 3 wt% Fe alloyed with Ti-25 wt% Nb displays a lowest modulus with differing concentrations (i.e., 1, 3, 5, and 7 wt%) of Fe elements [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Nb on $β \to α^{″}$ Martensitic Phase Transformation and Characterization of New Biomedical Ti-xNb-3Fe-9Zr A

et al. 2021

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A new generation of Ti-xNb-3Fe-9Zr ( x = 15 , 20, 25, 30, 35 wt %) alloys have been designed using various theoretical approaches including DV-xα cluster, molybdenum equivalency, and electron to atom ratio. Afterward, designed alloys are fabricated using cold crucible levitation melting technique. The microstructure and mechanical performances of newly designed alloys are characterized in this work using scanning electron microscope and universal testing machine, respectively. Each alloy demonstrates monolithic β phase except Ti-35Nb-3Fe-9Zr alloy which display dual α ″ + β phases. Typically, niobium acts as an isomorphous beta stabilizer. However, in this work, formation of martensitic α ″ phases occurs at 35 wt % of niobium among the series of newly designed alloys. Furthermore, none of the alloys fail till the maximum load capacity of machine, i.e., 100 KN except Ti-35Nb-3Fe-9Zr alloy. Moreover, the Vickers hardness test is carried out on Ti-xNb-3Fe-9Zr alloys which demonstrate slip bands around the indentation for each alloy. Notably, the deformation bands and cracks around the indentations of each alloy have been observed using optical microscopy; Ti-35Nb-3Fe-9Zr demonstrates some cracks along with slip bands around its indentation. The Ti-25Nb-3Fe-9Zr alloy shows the highest yield strength of 1043 ± 20 MPa , large plasticity of 32 ± 0.5 % , and adequate hardness of 152 ± 3.90 Hv among the investigated alloys. The Ti-25Nb-3Fe-9Zr alloy demonstrates good blend of strength and malleability. Therefore, Ti-25Nb-3Fe-9Zr can be used effectively for the biomedical applications.

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“…When the content of β stabilizing element in titanium alloy is low, β→α′ martensite transformation will take place during quenching. With the increase of the content of the β stabilizing elements to a critical value, α′ martensite transformation will be inhibited and a metastable β phase (with or without very fine α′, ω) will be obtained [10,11]. This metastable β phase has very bad stability.…”

Section: Introductionmentioning

confidence: 99%

Design of high strength titanium alloy through finding a critical composition with ultra-fine α phase

Zhang

Zhou

Wang

et al. 2020

Mater. Res. Express

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This study presents the design of a high strength titanium alloy based on the idea that the β titanium alloy with critically stable composition could precipitate ultra-fine α phase. An efficient method was used to find the composition of TC21-xV alloy in which ultra-fine α phase could be obtained. It is found that TC21-5V alloy containing ultra-fine α phase and possessing highest hardness could be obtained after solution treatment in the β single-phase region and subsequent aging. The morphology of primary and secondary α phases can be controlled by changing the solution treatment and aging temperatures. Calculation results of driving force and growth rate of secondary α phase show that the growth rate may be a decisive factor for the final size of secondary α phase after solution and aging treatments in the two-phase region. Finally, when the alloy was solution treated at 820°C and aged at 500°C, the highest strength of 1540 MPa was obtained. The alloy was solution treated at 820°C and aged at 600°C exhibited high strength of 1210 MPa with 11.4% elongation.

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Effect of Fe content on microstructures and properties of Ti6Al4V alloy with combinatorial approach

Cited by 22 publications

References 36 publications

Design of Low-Cost and High-Strength Titanium Alloys Using Pseudo-Spinodal Mechanism through Diffusion Couple Technology and CALPHAD

Design of Low-Cost and High-Strength Titanium Alloys Using Pseudo-Spinodal Mechanism through Diffusion Couple Technology and CALPHAD

Effect of Nb on $β \to α^{″}$ Martensitic Phase Transformation and Characterization of New Biomedical Ti-xNb-3Fe-9Zr A

Design of high strength titanium alloy through finding a critical composition with ultra-fine α phase

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Effect of Fe content on microstructures and properties of Ti6Al4V alloy with combinatorial approach

Cited by 22 publications

References 36 publications

Design of Low-Cost and High-Strength Titanium Alloys Using Pseudo-Spinodal Mechanism through Diffusion Couple Technology and CALPHAD

Design of Low-Cost and High-Strength Titanium Alloys Using Pseudo-Spinodal Mechanism through Diffusion Couple Technology and CALPHAD

Effect of Nb on β → α ″ Martensitic Phase Transformation and Characterization of New Biomedical Ti-xNb-3Fe-9Zr A

Design of high strength titanium alloy through finding a critical composition with ultra-fine α phase

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Effect of Nb on $β \to α^{″}$ Martensitic Phase Transformation and Characterization of New Biomedical Ti-xNb-3Fe-9Zr A