The effect of Zr on the microstructure and properties of Ti-35Nb-XZr alloy

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• 作者：Jaroslav Má ; lek^a ; ^b ; ^{malek@ujp.cz" class="auth_mail" title="E-mail the corresponding author} ; ^{Jaroslav.Malek@fs.cvut.cz" class="auth_mail" title="E-mail the corresponding author} ; Franti&scaron ; ek Hnilica^a ; ^{hnilica@ujp.cz" class="auth_mail" title="E-mail the corresponding author} ; Jaroslav Veselý ; ^a ; ^{vesely@ujp.cz" class="auth_mail" title="E-mail the corresponding author} ; Bohumil Smola^c ; ^{smola@met.mff.cuni.cz" class="auth_mail" title="E-mail the corresponding author} ; Kamil Kolař&iacute ; k^d ; ^{kamil.kolarik@email.cz" class="auth_mail" title="E-mail the corresponding author} ; Jaroslav Fojt^e ; ^{jaroslav.fojt@vscht.cz" class="auth_mail" title="E-mail the corresponding author} ; Martin Vlach^c ; ^{martin.vlach@mff.cuni.cz" class="auth_mail" title="E-mail the corresponding author} ; Veronika Kodetová ; ^c
• 关键词：Beta-titanium alloys ; Zirconium ; Mechanical properties ; Microstructure
• 刊名：Materials Science & Engineering A
• 出版年：2016
• 出版时间：15 October 2016
• 年：2016
• 卷：675
• 期：Complete
• 页码：1-10
• 全文大小：6917 K

文摘

The demand for biomaterials with high strength, low modulus, excellent biocompatibility and good corrosion resistance has led to the development of new alloys. Zirconium is known as a biocompatible element that can be used for alloying in titanium alloys. The effect of Zr on the mechanical and structural properties of a titanium alloy is studied in this paper. Binary Ti-35Nb alloy has been alloyed with various amounts of Zr (2, 4, 6 or 8 wt%). The specimens were thermo-mechanically processed (hot forged, solution treated 850 °C/0.5 h/water quenched, cold swaged and finally aged (at 400 °C or 450 °C for various periods). Cold-swaged alloys possess tensile strength of about 800 MPa, along with a low Young's modulus (~50 GPa). The elongation of all the alloys is more than 12%. The hardness increased during 400 °C annealing up to 370 HV10. The addition of Zr stabilized the β-phase and supports recrystallization and recovery processes. Corrosion resistance was also increased by the addition of Zr.