Effects of scandium and silicon addition on the microstructure and mechanical properties of Ti-6Al-4V alloy

Deng, Tongsheng; Li, Shang; Liang, Yunhao; Sun, Lu; Zhang, Yinghui

doi:10.1016/j.jmrt.2020.03.092

Cited by 30 publications

(11 citation statements)

References 23 publications

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“…An increase in the strength of the alloy with the scandium additive is determined by the decomposition of the supersaturated solid solution, accompanied by the formation of the coherent interface between the matrix and the particle, as a result of which scandium forms the Al 3 Sc phase. This leads to some improvement of strength characteristics, including material creep [ 1 , 12 , 41 ].…”

Section: Resultsmentioning

confidence: 99%

“…They have the necessary properties: they withstand high temperatures, are resistant to corrosion, etc. [ 1 ]. Ti-Al-based alloys are heat-resistant alloys for automobile and aircraft industries [ 2 ], they are applied in additive manufacture [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

“…To obtain titanium-aluminum alloys, there are many technologies: to identify selective laser melting [ 14 ], powder metallurgy [ 15 ], laser sintering/melting of aluminum alloy powders [ 16 ], physical vapor deposition [ 17 ], vacuum arc re-melting [ 1 ] and the electric current activated sintering method [ 18 ]. The technique of obtaining the Ti-Al-Sc system by the “Hydride Technology” (HT) is of interest for research purposes [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

“…Sc-containing alloys have been proven to be attractive materials [ 22 ]. Scandium has a significant influence on the structure on the structure and properties of aluminum-based alloys; namely, it affects the formation of grain structure, suppresses recrystallization processes and is a strong hardener of aluminum alloys [ 1 , 23 , 24 , 25 , 26 ]. Scandium, contained in aluminum alloys, improves their physic-chemical properties owing to the fine-grained structure formation [ 27 , 28 , 29 , 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

“…Sc in the titanium alloy can form the Al 3 Sc phase, which contributes to improving the creep of the titanium alloy [ 1 ]. Slight addition of Sc has a positive effect on the yield strength in alloys based on Ti-Al and Ti-48Al having duplex or lamellar structure [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

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The Influence of Scandium on the Composition and Structure of the Ti-Al Alloy Obtained by “Hydride Technology”

et al. 2021

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In this study the influence of scandium on the structural and phase state of the Ti-Al alloy obtained by the method of “Hydride Technology” (HT). The Rietveld method has allowed for determining the content of basic phases of the 49at.%Ti-49at.%Al-2at.%Sc system. By means of the methods of transmission electron microscopy (TEM) and X-ray spectral microanalysis, it has been established that scandium additives into the Ti-Al system result in the change of the quantitative content of phases in local regions of the structure. The Ti2Al5 phase has been found, and Ti2Al has been absent. In the morphology of substructures Ti-Al and Ti-Al-Sc there are lamellar structures or lamellae; the peculiarities of the distribution, fraction and size of which are influenced by scandium additives. The average width of Al-rich lamellae has been 0.85 µm, which is four times greater than that for the Ti-Al system (0.21 µm). For Ti-rich lamellae of the sample of the Ti-Al-Sc alloy, the average width of the lamellae has been 0.54 µm, and for Ti-Al it has been 0.34 µm. Based on the obtained data, a scheme of the distribution of phases in the composition of the Ti-Al-Sc alloy in the lamellar structures has been proposed. It has been established that in the Ti-Al-Sc system there is growth of the near-surface strength relative to Ti-Al. In this way, the microhardness of the Ti-Al-Sc alloy has amounted to 1.7 GPa, that is of the Ti-Al alloy which is 1.2 GPa.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The Influence of Scandium on the Composition and Structure of the Ti-Al Alloy Obtained by “Hydride Technology”

et al. 2021

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Laser-based powder bed fusion of Ti-6Al-4V powder modified with SiO2 nanoparticles

Emminghaus

Bernhard

Hermsdorf

et al. 2022

Int J Adv Manuf Technol

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In laser-based powder bed fusion of metals (PBF-LB/M), residual oxygen in the processing atmosphere is regarded as disruptive and disadvantageous for the manufacturing process and the resulting component properties. A novel approach to eliminate residual oxygen is to add small amounts of silane to the argon process gas. Silane eliminates residual oxygen and forms SiO2 nanoparticles, which in turn can be incorporated into the powder during the process. It is therefore necessary to evaluate the influence of these nanoparticles admixed to the metal powder. In this work, Ti-6Al-4V powder was modified with pyrogenic SiO2 nanoparticles generated by the reaction of a silane argon gas mixture with ambient air. Modified and unmodified powder was analyzed and processed using statistically designed experiments. An improvement of the flow rate according to DIN EN ISO 4490 (from 33.3 to 32.5 s/50 g) and increase of apparent density according to DIN EN ISO 3923 (from 2.52 to 2.58 g/cm3) could be observed after powder modification. No statistically significant effects of the modification on roughness, porosity, and hardness were found. The results demonstrate that powder modification using silane can lead to enhanced flowability without affecting the PBF-LB processing window of Ti-6Al-4V.

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Effect of Y2O3 Addition on Microstructural Characteristics and Microhardness of Laser-Cladded Ti-6Al-4V Alloy Coating

Zhang

Xiao

Zhang

et al. 2020

J. of Materi Eng and Perform

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Effects of scandium and silicon addition on the microstructure and mechanical properties of Ti-6Al-4V alloy

Cited by 30 publications

References 23 publications

The Influence of Scandium on the Composition and Structure of the Ti-Al Alloy Obtained by “Hydride Technology”

The Influence of Scandium on the Composition and Structure of the Ti-Al Alloy Obtained by “Hydride Technology”

Laser-based powder bed fusion of Ti-6Al-4V powder modified with SiO2 nanoparticles

Effect of Y2O3 Addition on Microstructural Characteristics and Microhardness of Laser-Cladded Ti-6Al-4V Alloy Coating

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