Active Corrosion Rate for Ti-based Alloys in Aqueous Corrosion and Its Correlation with the Bond Order Obtained by Electron Theory.

Morishita, Masao; Ashida, Yoshio; Chikuda, Masahiro; Morinaga, Masahiko; Yukawa, Natsuo; Adachi, Hirohiko

doi:10.2355/isijinternational.31.890

Cited by 19 publications

(7 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…11 indicates that an increase in the bond strength between atoms leads to high oxidation resistance. This agrees with the result obtained from the active corrosion rate of Ti alloys in 10%H 2 SO 4 at 343 K. 33 It is found that the alloying effects by ternary elements (Re, Fe and Cr) on the mechanical, oxidation and physical properties were explained well using two parameters (Bo and Md) used in the d-electrons concept even for intermetallic compounds, as well as metallic materials such as Ni, Ti, Al, Mg and Fe based alloys, etc. [17][18][19]34 Conclusions 1.…”

Section: Evaluation Of Alloying Effects By Bo and MD Parameterssupporting

confidence: 92%

Melting and solidification of TiNi alloys by cold crucible levitation method and evaluation of their characteristics

Matsugi

Mamiya²,

Choi

et al. 2008

International Journal of Cast Metals Research

View full text Add to dashboard Cite

The addition of Re, Fe and Cr into Ti-50 mol.-%Ni has been carried out to improve the oxidation and mechanical properties. The mono phase consisting of TiNi with the B2 type structure was identified in micro-alloyed materials proposed on the basis of the d-electrons concept. Experimentally, TiNi alloys were melted and solidified by the cold crucible levitation melting (CCLM) method. The TiNi-(Cr, Fe, Re) alloys with high purity and without contamination from a crucible were prepared, and the homogeneous microstructure was achieved by the diffusion mixing effect of CCLM even in the as-cast alloys which contained Re and Cr with higher melting temperatures and different specific gravities. The transformation from austenite to martensite phases occurred in all alloys below or above room temperature. Some alloys had the ability of shape memory even at room temperature. Ternary alloys showed a higher flow stress level compared with the binary TiNi alloy. On the other hand, the oxidation at 1273 K was promoted by the formation of titanium oxides (TiO 2 ) on the alloy surfaces. The oxidation resistance was improved by the formation of the continuous Cr 2 O 3 film in TiNi-Cr alloys. The alloying effects by ternary elements (Re, Fe, Cr) in the intermetallic TiNi as well as metallic materials were explained well using two parameters used in the d-electrons concept.

show abstract

Section: Evaluation Of Alloying Effects By Bo and MD Parameterssupporting

confidence: 92%

Melting and solidification of TiNi alloys by cold crucible levitation method and evaluation of their characteristics

Matsugi

Mamiya²,

Choi

et al. 2008

International Journal of Cast Metals Research

View full text Add to dashboard Cite

show abstract

“…12 indicates that an increase in the bond strength between atoms leads to high oxidation resistance. This agrees with the results obtained from the active corrosion rate in 10%H 2 SO 4 at 343 K 44) and the weight loss in Na 2 SO 4 -45 mol%NaCl molten salt at 923 K 19) for of various Ti alloys.…”

Section: Oxidation Resistancesupporting

confidence: 82%

Property-Control of TiNi System Intermetallics and Their Characteristics

et al. 2011

View full text Add to dashboard Cite

The martensitic transformation temperature in addition to the tensile strength and oxidation resistance, were able to be estimated in the crystal structure map using both parameters of the bond order and d-orbital energy level of elements, for the design of TiNi shape memory compounds. The ternary TiNi-(Cr, Re, Fe, Cu, Al) intermetallics having the objective constructed phase, tensile strength, Ms-temperatures and oxidation resistance, were obtained successfully, by the adjustment of both parameters. It is found that the effectiveness of the d-electrons concept could be judged, for property-control of ternary TiNi intermetallics, as well as metallic materials.

show abstract

“…47 High corrosion resistance is critical for bio implants, and it was found that Ti alloys with higher Bo values exhibit excellent corrosion resistance. 48 Researchers have also aimed to develop Ti alloys with low Young's modulus and high strength, as the modulus of an alloy decreases with increasing Bo value. 49 Table 6 provides Bo and Md values for some Ti alloys.…”

Section: D-electronmentioning

confidence: 99%

“…Metastable β-Ti alloys are important as they exhibit a wide range of mechanical properties after various deformation mechanisms, including hybrid twinning-induced plasticity (TWIP) and transformation-induced plasticity (TRIP) deformation mechanisms, which can also be explained using the Bo-Md phase diagram . High corrosion resistance is critical for bio implants, and it was found that Ti alloys with higher Bo values exhibit excellent corrosion resistance . Researchers have also aimed to develop Ti alloys with low Young’s modulus and high strength, as the modulus of an alloy decreases with increasing Bo value …”

Section: Alloy Design Conceptsmentioning

confidence: 99%

Progress in the Optimization of Compositional Design and Thermomechanical Processing of Metastable β Ti Alloys for Biomedical Applications

N B,

et al. 2024

ACS Biomater. Sci. Eng.

View full text Add to dashboard Cite

Over the past few years, significant research and development in the manufacturing industry related to the medical field has been done. The aim has been to improve existing biomaterials and bioimplants by exploring new methods and strategies. Beta titanium alloys, known for their exceptional strength-to-modulus ratio, corrosion resistance, biocompatibility, and ease of shaping, are expected to play a crucial role in manufacturing the next generation of biomedical equipment. To meet the specific requirements of human bone, researchers have employed key techniques like compositional design and thermomechanical processing routes to advance biomaterial development. These materials find extensive applications in orthopedic, orthodontic, and cardiovascular biomedical implants. Several studies have shown that precise material composition, with appropriate heat treatment and suitable mechanical approaches, can yield the desired mechanical properties for bone implants. In this review article, we explore the evolution of alloys at different stages, with a particular focus on their preparation for use in biomedical implants. The primary focus is on designing low-modulus β Ti alloy compositions and employing processing techniques to achieve high strength while maintaining a low young modulus suitable for biomedical applications.

show abstract

Active Corrosion Rate for Ti-based Alloys in Aqueous Corrosion and Its Correlation with the Bond Order Obtained by Electron Theory.

Cited by 19 publications

References 0 publications

Melting and solidification of TiNi alloys by cold crucible levitation method and evaluation of their characteristics

Melting and solidification of TiNi alloys by cold crucible levitation method and evaluation of their characteristics

Property-Control of TiNi System Intermetallics and Their Characteristics

Progress in the Optimization of Compositional Design and Thermomechanical Processing of Metastable β Ti Alloys for Biomedical Applications

Contact Info

Product

Resources

About