Influence of boron addition on microstructure and mechanical properties of dental cast titanium alloys

Zhu, Jun; Kamiya, Akira; Yamada, Takeo; Wen, Shi-Zheng; Naganuma, Katsuyoshi

doi:10.1016/s0921-5093(02)00102-8

Cited by 132 publications

(59 citation statements)

References 8 publications

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“…[4][5][6] Despite its many good properties, some disadvantages (especially relatively low strength) of cast pure titanium have often been criticized to be insufficient for certain dental applications such as long-spanned fixed prostheses and the frameworks of removable partial dentures (RPD). 4,[7][8][9][10] Ti6Al-7Nb alloy was originally developed using niobium to replace vanadium in Ti-6Al-4V for orthopedic applications. 11) Then, this alloy has also been used as a dental casting metal, especially in Japan.…”

Section: Introductionmentioning

confidence: 99%

Comparison among Mechanical Properties of Investment-Cast c.p. Ti, Ti-6Al-7Nb and Ti-15Mo-1Bi Alloys

Lin

2004

Mater. Trans.

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The present study compares castability and mechanical performance among alloys of c.p. Ti, Ti-6Al-7Nb and a newly-developed Ti-15Mo-1Bi in regard to their as-cast state. Experimental results indicate that average cast length of Ti-6Al-7Nb appears a little lower than c.p. Ti and Ti-15Mo-1Bi, although the differences are not significant. C.p. Ti has an hcp phase of lath-type morphology with serrated, irregular grain boundaries. Ti-6Al-7Nb is dominated by hexagonal 0 phase with acicular martensitic morphology. In particular, Ti-15Mo-1Bi is comprised of equiaxed, metastable bcc phase. The hardened layer thicknesses of three materials are similar. Ti-15Mo-1Bi has the highest surface microvickers hardness, while c.p. Ti has the lowest. The bulk hardness of c.p. Ti is much lower than the other two alloys which display similar hardness. Notably, Ti-15Mo-1Bi and Ti-6Al-7Nb have similar bending strength which is far higher than c.p. Ti. The bending modulus of Ti-15Mo-1Bi is significantly lower than c.p. Ti and Ti-6Al-7Nb. Ti-15Mo-1Bi also shows a much larger elastic recovery angle than two other materials. Tensile test indicates that Ti-15Mo-1Bi has a similar UTS but much higher YS and elongation along with much lower tensile modulus compared to Ti-6Al-7Nb.

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Section: Introductionmentioning

confidence: 99%

Comparison among Mechanical Properties of Investment-Cast c.p. Ti, Ti-6Al-7Nb and Ti-15Mo-1Bi Alloys

Lin

2004

Mater. Trans.

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“…In our previous study, 10,11) it has been found that a small amount of boron and silicon addition induces a significant refinement of as-cast structure and improvement of mechanical properties. Cast Ti-0.5Si-0.2B and Ti-0.2B alloys display relatively higher strength and ductility.…”

Section: Introductionmentioning

confidence: 94%

“…10,11) The obtained as-cast ingot was a rectangular one with a dimension of approximately 45 Â 20 Â 12 mm 3 . The chemical compositions of elemental materials used in this study were summarized in Table 1.…”

Section: Experiments Proceduresmentioning

confidence: 99%

Microstructure and Mechanical Properties of a Rolled Ti-Si-B Alloy

et al. 2003

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In order to obtain the Ti-Si-B alloys with uniform and fine microstructure, the hot workability of Ti-Si-B alloys was investigated by rolling method. The influence of deformation on the microstructure and mechanical properties was studied using optical microscopy, SEM, EPMA and mechanical properties testing. Results show that the alloys exhibit good thermal plasticity from 773 to 1173 K. The deformation induced a significant refinement of microstructure of Ti-Si-B alloys. Both tensile strength and ductility were improved through rolling deformation. The elongation of Ti-0.5Si-0.2B alloy was up to 25.7% and the tensile strength is about 828 MPa when the alloy was rolled with reduction of 50% at 1173 K. Relatively lower rolling temperature can improve the microstructures and mechanical properties of the titanium alloys more effectively.

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“…Similar microstructural refinements due to the presence of TiC or TiB particles in Ti alloys were also reported elsewhere. 31,32) The microstructure of Monolithic 2, formed by the application of extrusion process, also showed unique characteristics as compared to Monolithic 1 and 3. Monolithic 2 exhibited much finer thickness of platelet ($2 mm) and severely deformed and elongated primary platelets with a high aspect ratio of $10.…”

Section: Microstructurementioning

confidence: 99%

Influence of Processing on the Mechanical Properties of Ti-6Al-4V-Based Composites Reinforced with 7.5 mass% TiC and 7.5 mass% W

Choe

Abkowitz²,

Abkowitz³

2008

Mater. Trans.

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7.5 mass% TiC and 7.5 mass% W powder blends were densified with Ti-6Al-4V blends by combined cold and hot isostatic pressing (CHIP) method to result in three types of composites with differing processing histories, namely hot isostatic pressing (HIPping), extrusion, and casting, which were compared with their monolithic counterparts. Tensile and microhardness tests, along with compressive testing, were carried out to investigate the mechanical properties of powder metallurgy (P/M) Ti-6Al-4V-7.5%TiC-7.5%W composites at ambient temperature. Dissolution of W powder in the Ti-6Al-4V matrix during consolidation seems to be limited by the presence of TiC particles, which can in turn influence mechanical properties of the composites. Cast Ti-6Al-4V-7.5%TiC-7.5%W composite exhibits superior hardness, yield strength, and tensile strength, with a decrease in ductility, compared to its monolithic counterpart and other composites.

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Influence of boron addition on microstructure and mechanical properties of dental cast titanium alloys

Cited by 132 publications

References 8 publications

Comparison among Mechanical Properties of Investment-Cast c.p. Ti, Ti-6Al-7Nb and Ti-15Mo-1Bi Alloys

Comparison among Mechanical Properties of Investment-Cast c.p. Ti, Ti-6Al-7Nb and Ti-15Mo-1Bi Alloys

Microstructure and Mechanical Properties of a Rolled Ti-Si-B Alloy

Influence of Processing on the Mechanical Properties of Ti-6Al-4V-Based Composites Reinforced with 7.5 mass% TiC and 7.5 mass% W

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