Assessment of β stabilizers additions on microstructure and properties of as-cast β Ti–Nb based alloys

Santos, Rafael Formenton Macedo dos; Rossi, Mariana Correa; Vidilli, André Luiz; Amigó, V.; Afonso, Conrado Ramos Moreira

doi:10.1016/j.jmrt.2022.12.144

Cited by 29 publications

(12 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The MC sample has presented only the β phase, whereas the SC and RC have presented not only the β phase but also a β' phase The high content of the β-stabilizer element may explain it; when there is a high quantity of a β-stabilizer solute, it is possible to form a new β phase, which is called β', with different lattice parameter and chemical composition through spinodal decomposition. These results are in agreement with literature 21,22 .…”

Section: Resultssupporting

confidence: 94%

“…Differently from them, 40 MC has presented an utterly dendritic structure, which is common in processing with mold. The results found here are in coherence with the ones found in the literature 21,[23][24][25] .…”

Section: Resultssupporting

confidence: 93%

“…In both cases, wear volume and coefficient, the results presented by CM and RC conditions did not vary significantly since it has similar hardness and elastic modulus although it has presented different phases. The hardness and elastic modulus results are in accordance with literature [21][22][23][24][25] In Figure 2b it is presented the results of Ti-25Nb. It was observed a similar result that 15Nb and the wear volume varies according to hardness.…”

Section: Ti-15nbsupporting

confidence: 87%

See 2 more Smart Citations

Wear Behavior of Ti-xNb Biomedical Alloys by Ball Cratering

Mattos,

Kuroda,

Rossi

et al. 2024

Mat. Res.

Self Cite

View full text Add to dashboard Cite

Ti alloys have been developing through the years, aiming the biomedical application since it has suitable properties. Among Ti alloys, the Ti-Nb systems are a pronounced group to biomedical applications due to its low elastic modulus, good corrosion resistance, and mechanical properties. Although this system is quite well-known regarding its phases, structure and properties, there is not plenty of information about wear available in the literature. To investigate the wear resistance, the samples were submitted to x-ray diffraction (XRD) and scanning electron microscopy (SEM) to analyze the phases formed. Hardness and elastic modulus were measured by microhardness Vickers and dynamic Young modulus by excitation impulse. Additionally, wear volume, wear resistance, and H/E ratio were calculated to understand the wear material's performance. This study aims to investigate the wear resistance of Ti-xNb (x = 15, 25 and 40wt.%), one of each type of Ti alloys and phases formed: Ti-15Nb (α´), Ti-25Nb (α") and Ti-40Nb (β) and the influence of cooling rate after solution heat treatment on wear properties through ball cratering. It was possible to find that the harder the alloy, the higher the wear resistance. Thus, in the case of Ti-xNb (x = 15, 25 and 40wt.%), alloys the hardness plays a significant role in wear resistance. Besides that, the samples that have presented the α´ or α"phase have the lowest wear resistance. Therefore, not only the hardness influences the wear resistance but also the combination of phases formed.

show abstract

Section: Resultssupporting

confidence: 94%

Section: Resultssupporting

confidence: 93%

Section: Ti-15nbsupporting

confidence: 87%

See 1 more Smart Citation

Wear Behavior of Ti-xNb Biomedical Alloys by Ball Cratering

Mattos,

Kuroda,

Rossi

et al. 2024

Mat. Res.

Self Cite

View full text Add to dashboard Cite

show abstract

“…To carry out the microhardness measurements, a Shimadzu HMV-2 microdurometer was used. Five indentations were made on the sample using 0.245 N force (applied load of 25 g) for 15 s [ 32 ]. Before carrying out the hardness tests, the Ti-15Nb alloy was again submitted to the metallographic preparation process.…”

Section: Methodsmentioning

confidence: 99%

A New α + β Ti-15Nb Alloy with Low Elastic Modulus: Characterization and In Vitro Evaluation on Osteogenic Phenotype

Donato,

Sousa,

Kuroda

et al. 2023

JFB

View full text Add to dashboard Cite

This study aimed to produce Ti-15Nb alloy with a low elastic modulus, verify its biocompatibility, and determine whether the alloy indirectly influences cellular viability and morphology, as well as the development of the osteogenic phenotype in cells cultured for 2, 3, and 7 days derived from rat calvarias. Two heat treatments were performed to modify the mechanical properties of the alloy where the Ti-15Nb alloy was heated to 1000 °C followed by slow (−5 °C/min) (SC) and rapid cooling (RC). The results of structural and microstructural characterization (XRD and optical images) showed that the Ti-15Nb alloy was of the α + β type, with slow cooling promoting the formation of the α phase and rapid cooling the formation of the β phase, altering the values for the hardness and elastic modulus. Generally, a more significant amount of the α phase in the Ti-15Nb alloy increased the elastic modulus value but decreased the microhardness value. After the RC treatment, the results demonstrated that the Ti-15Nb alloy did not present cytotoxic effects on the osteogenic cells. In addition, we did not find variations in the cell quantity in the microscopy results that could suggest cell adhesion or proliferation modification.

show abstract

“…Low-priced Mo-Fe master alloys have been used as alloying elements for their cost. Only a 10% weight of molybdenum (Mo) is required to stabilize the β phase at room temperature, making it a potent β-stabilizing element [ 10 ]. The addition of Mo reduces the elastic modulus and increases the strength of titanium alloys [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

The Effect of the Forging Process on the Microstructure and Mechanical Properties of a New Low-Cost Ti-5Al-1.5Mo-1.8Fe Alloy

et al. 2023

Materials

View full text Add to dashboard Cite

This paper presents results on the microstructure and mechanical properties of a new low-cost titanium alloy Ti-5Al-1.5Mo-1.8Fe after different forging processes. The β phase transformation temperature of this alloy was 950 °C. In this study, the forging temperatures were designed at 920 °C and 980 °C, and the deformation degree ranged from 20% to 60%, with an interval of 20%. This study investigated the impact of the equiaxed α phase and shape of the lamellar microstructure on the tensile characteristics and fracture toughness of an alloy. The research employed a microstructure analysis and static tensile testing to evaluate the effect of forging temperatures and degree of deformation on the microstructure features. The findings revealed that forging temperatures could modify the microstructure characteristics, and the degree of deformation also affected this microstructure. This study demonstrates that a bimodal structure with an equiaxed α phase can be utilized to balance high strength and high ductility, resulting in better overall mechanical properties.

show abstract

Assessment of β stabilizers additions on microstructure and properties of as-cast β Ti–Nb based alloys

Cited by 29 publications

References 38 publications

Wear Behavior of Ti-xNb Biomedical Alloys by Ball Cratering

Wear Behavior of Ti-xNb Biomedical Alloys by Ball Cratering

A New α + β Ti-15Nb Alloy with Low Elastic Modulus: Characterization and In Vitro Evaluation on Osteogenic Phenotype

The Effect of the Forging Process on the Microstructure and Mechanical Properties of a New Low-Cost Ti-5Al-1.5Mo-1.8Fe Alloy

Contact Info

Product

Resources

About