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Low young's modulus Ti-Nb-O with high strength and good plasticity

Authors :
Daixiu Wei
Masaaki Nakai
Deng Pan
Qiang Li
Tomoyuki Kakeshita
Dong Ma
Yuichiro Koizumi
Mitsuo Niinomi
Junjie Li
Akihiko Chiba
Takayoshi Nakano
Kai Zhou
Source :
Materials Transactions. 59(5):858-860
Publication Year :
2018
Publisher :
The Japan Institute of Metals and Materials, 2018.

Abstract

Li Q., Ma D., Li J., et al. Low young's modulus Ti-Nb-O with high strength and good plasticity. Materials Transactions 59, 858 (2018); https://doi.org/10.2320/matertrans.M2018021.<br />Oxygen was added to Ti-38Nb (mass%) alloys to improve their mechanical properties. Ti-38Nb-xO (x = 0.13, 0.24, 0.46, mass%) alloys were prepared by arc melting, and subsequently subjected to homogenization, hot rolling, and solution treatment. It was found that adding oxygen suppresses the martensite transformation and exhibits strong solution strengthening effect. Single β phase is obtained in Ti-38Nb-0.24O, whereas Ti-38Nb-0.13O is composed of both α′′ and β phases. Both alloys exhibit double yielding phenomena during tension, indicating a stress-induced martensitic transformation. Ti-38Nb-0.46O exhibits a non-linear deformation, a low Young's modulus of 62 GPa, high tensile strength up to 780 MPa, and elongation around 23%, which are promising characteristics for biomedical applications.

Details

Language :
English
ISSN :
13459678
Volume :
59
Issue :
5
Database :
OpenAIRE
Journal :
Materials Transactions
Accession number :
edsair.doi.dedup.....0822f6e2689f2204f373532afe0d7bfa