TY - JOUR
T1 - Development of low-Young’s modulus Ti–Nb-based alloys with Cr addition
AU - Li, Qiang
AU - Ma, Guanghao
AU - Li, Junjie
AU - Niinomi, Mitsuo
AU - Nakai, Masaaki
AU - Koizumi, Yuichro
AU - Wei, Dai Xiu
AU - Kakeshita, Tomoyuki
AU - Nakano, Takayoshi
AU - Chiba, Akihiko
AU - Liu, Xuyan
AU - Zhou, Kai
AU - Pan, Deng
N1 - Funding Information:
This study was partially supported by the Natural Science Foundation of Shanghai, China (No. 15ZR1428400), Shanghai Key Technology Support Program (No. 16060502400), National Natural Science Foundation of China (No. 61504080), Project of Creation of Life Innovation Materials for Interdisciplinary and International Researcher Development, Tohoku University, Japan, sponsored by the Ministry of Education, Culture, Sports, Science, and Technology of Japan, and Grant-in-Aid for Scientific Research (B) (No. 17H03419) from the Japan Society for the Promotion of Science (JSPS), Tokyo, Japan.
Publisher Copyright:
© 2019, Springer Science+Business Media, LLC, part of Springer Nature.
PY - 2019/6/15
Y1 - 2019/6/15
N2 - Different amounts of Cr were added to a metastable β-type Ti–22Nb (at.%) alloy to obtain desirable mechanical properties, including a low Young’s modulus, high strength, and good plasticity. The mechanical properties and microstructural changes were investigated. Cr has a high ability to stabilize the β phase, as well as suppress both α″ martensite and ω phase transformations during quenching and the stress-induced α″ martensite transformation during tension. Solid solution strengthening is scarcely achieved by Cr addition. The changes in mechanical properties can be attributed to the different β stabilities. The Ti–22Nb–(0,1)Cr alloys have metastable β phases and exhibit double yielding phenomena, indicating a stress-induced α″ martensite transformation. The Ti–22Nb–(2,3)Cr alloys with stable β phases exhibit distinct work hardening caused by a {332}β<113>β twinning, which also occurs in the Ti–22Nb–(0,1)Cr alloys, but not in the Ti–22Nb–4Cr alloy. Low Young’s moduli of approximately 60 GPa are obtained for the Ti–22Nb–(1,2)Cr alloys. The Ti–22Nb–2Cr alloy exhibits desirable properties for biomedical applications, including an ultimate tensile strength of approximately 600 MPa and elongation of approximately 20%.
AB - Different amounts of Cr were added to a metastable β-type Ti–22Nb (at.%) alloy to obtain desirable mechanical properties, including a low Young’s modulus, high strength, and good plasticity. The mechanical properties and microstructural changes were investigated. Cr has a high ability to stabilize the β phase, as well as suppress both α″ martensite and ω phase transformations during quenching and the stress-induced α″ martensite transformation during tension. Solid solution strengthening is scarcely achieved by Cr addition. The changes in mechanical properties can be attributed to the different β stabilities. The Ti–22Nb–(0,1)Cr alloys have metastable β phases and exhibit double yielding phenomena, indicating a stress-induced α″ martensite transformation. The Ti–22Nb–(2,3)Cr alloys with stable β phases exhibit distinct work hardening caused by a {332}β<113>β twinning, which also occurs in the Ti–22Nb–(0,1)Cr alloys, but not in the Ti–22Nb–4Cr alloy. Low Young’s moduli of approximately 60 GPa are obtained for the Ti–22Nb–(1,2)Cr alloys. The Ti–22Nb–2Cr alloy exhibits desirable properties for biomedical applications, including an ultimate tensile strength of approximately 600 MPa and elongation of approximately 20%.
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U2 - 10.1007/s10853-019-03457-0
DO - 10.1007/s10853-019-03457-0
M3 - Article
AN - SCOPUS:85062643348
SN - 0022-2461
VL - 54
SP - 8675
EP - 8683
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 11
ER -