Abstract
The hot deformation behavior of Ti-55Ni (at. pct) alloy was studied using compression testing at 1173 K (900 °C) to 1323 K (1050 °C) and at the strain rates of 0.001 to 0.35 s−1. The microstructure evolution was characterized using optical and scanning electron microscopy (SEM). The influences of hot-working parameters on the flow stress and microstructural features of this alloy were then analyzed. The results indicate that, depending on the temperature and strain rate, the dynamic recrystallization (DRX) is the dominate mechanism. Besides, the particle-stimulated nucleation (PSN) mechanism could partially recrystallize the structure. The PSN phenomenon is of significant importance for the Ti-55Ni (at. pct) that suffers from insufficient workability because of its high content of intermetallic phases. It is of interest that the discontinuous yielding phenomenon has been observed when the specimens were deformed at 1173 K (900 °C). Finally, the optimum parameters for hot working of Ti-55Ni (at. pct) alloy are determined as well.
Similar content being viewed by others
References
D.J. Clingman, F.T. Clalkins, and J.P. Smith: Proc. SPIE-Active Mater.: Behavior Mechan., 2003, vol. 5053, pp. 219–29.
G.J. Julien: Cutting instrument. In U.S. Patent 6293020B1, Nitinol Technologies, Inc., Edgewood, WA, 2001, pp. 1–35.
G.J. Julien: Nitinol washers. In U.S. Patent 187020A1, Nitinol Technologies, Inc., Edgewood, WA, 2002, pp. 1–13.
G.J. Julien: Shape memory parts of 60 Nitinol. In U.S. Patent 7005018, Nitinol Technologies, Inc., Edgewood, WA, 2006, pp. 1–15.
G.J. Julien: Manufacturing of Nitinol parts and forms. In U.S. Patent 6422010B1, Nitinol Technologies, Inc., Edgewood, WA, 2002, pp. 1–14.
G.J. Julien, Nitinol ice blade. In U.S. Patent 2005/0082773, Nitinol Technologies, Inc., Edgewood, WA, 2005, pp. 1–11.
G.J. Julien: Gun barrel. In U.S. Patent 5856631, Nitinol Technologies, Inc., Edgewood, WA, 1999, pp. 1–24.
G.J. Julien: Nitinol ski structure. In U.S. Patent 6267402 B1, Nitinol Technologies, Inc., Edgewood, WA, 2001, pp. 1–13.
W. Gao, A. Belyakov, H. Miura, and T. Sakai: Mater. Sci. Eng. A, 1999, vol. 265, pp. 233–9.
A. Belyakov, H. Miura, and T. Sakai: Int. Conf. Thermomech. Process. of Steel Other Mater., 1997, vol. 1, pp. 257–63.
ASTM E 407:1999, American Society for Testing and Materials Standard Practice for Microetching Metals and Alloys, 1999, pp. 1–21.
S.M. Fatemi-Varzaneh, A. Zarei-Hanzaki, and M. Haghshenas: Mater. Sci. Eng. A, 2008, vol. 497, pp. 438–44.
I.P. Pinheiro, R. Barbosa, and P.R. Cetlin: Mater. Sci. Eng. A, 2007, vol. 457, pp. 90–93.
Y. Kim Hee and H. Hong Soon: Mater. Sci. Eng. A, 1999, vol. 271, pp. 382–89.
Y.Y. Zong, D.B. Shan, M. Xu, and Y. Lv: J. Mater. Process. Technol., 2009, vol. 209, pp. 1988–94.
K. Otsuka and X. Ren: Prog. Mater. Sci., 2005, vol. 50, pp. 511–678.
Y. Duan, P. Li, K. Xue, Q. Zhang, and X. Wang: Trans. Nonferrous Met. Soc. China, 2007, vol. 17, pp. 1199–204.
K. Dehghani and A.A. Khamei, Mater. Sci. Eng. A, 2010, vol. 527, pp. 684–70.
A.A. Khamei and K. Dehghani: Mater. Chem. Phys., 2010, vol. 123, pp. 269–77.
R.R. Adharapurapu and K.S. Vecchio: Soc. Exper. Mech., 2007, vol. 47, pp. 365–71.
ASM International: ASM Handbook, Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, vol. 2, ASM International, Materials Park, OH, 1993, pp. 431.
W. Zhang and S. Zhang: Acta Metal. Sinica, 2006, vol. 42, pp. 1036–40.
Z. Honggang, H. Yong, L. Xuefeng, and X. Jianxin: Acta Metal. Sinica, 2007, vol. 43, pp. 930–36.
D. Ponge and G. Gottstein: Acta Mater., 1998, vol. 46, pp. 69–80.
W. Roberts, H. Boden, and B. Ahlblom: Metal Sci., 1979, vol. 13, pp. 195.
H. Miura, H. Tsukawaki T. Sakai, and J.J. Jonas: Acta Mater., 2008, vol. 56, pp. 4944–52.
M. Winning: Scripta Mater., 2008, vol. 58, pp. 85–88.
O. Balancin, W.A.M. Hoffmann, and J.J. Jonas: Metall. Mater. Trans. A, 2000, vol. 31A, pp. 1353–64.
Y.Y. Zong, D.B. Shan, M. Xu, and Y. Lv: Mater. Process. Tech., 2009, vol. 209, pp. 1988–94.
Author information
Authors and Affiliations
Corresponding author
Additional information
Manuscript submitted November 14, 2009.
Rights and permissions
About this article
Cite this article
Khamei, A., Dehghani, K. Microstructural Evolution During the Hot Deformation of Ti-55Ni (at. pct) Intermetallic Alloy. Metall Mater Trans A 41, 2595–2605 (2010). https://doi.org/10.1007/s11661-010-0338-8
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11661-010-0338-8