Precipitation Softening and Precipitate Free Zones of V55Ti30Ni15 Alloys During Heat Treatment

doi:10.1007/s40195-014-0149-9

Abstract

Abstract:

The microstructure, hardness, and precipitate free zones (PFZ) of V₅₅Ti₃₀Ni₁₅ alloys during heat treatment have been investigated in this study. The microstructure resulting from different heat treatment conditions has a great influence on hardness. The microstructure resulting from different heat treatment conditions has a great influence on hardness. Fine NiTi particles precipitate from the supersaturated V-matrix solid solution at 750°C, increase in quantity until 800°C, and then dissolve back into the V-matrix at 850°C. The resultant hardness decreases with temperature until 800°C, and then increases from 800 to 850°C. The microstructure containing small NiTi precipitates resulting from the treatment of 18h at 800°C has a good soft condition for workability. PFZ formed at the grain boundary of V-matrix during heat treatment was observed. Vacancies depletion in V-matrix maybe led to the formation of PFZ.

Key words: V-Ti-Ni, Heat treatment, Hardness, Precipitation softening, Precipitate free zones

Peng Jiang, Yan-Dong Yu, Guang-Sheng Song, Daniel Liang, Michael Kellam, Michael Dolan. Precipitation Softening and Precipitate Free Zones of V₅₅Ti₃₀Ni₁₅ Alloys During Heat Treatment[J]. Acta Metallurgica Sinica (English Letters), 2015, 28(1): 15-21.

Figures/Tables 8

Fig.1 V55Ti30Ni15 alloy microhardness as a function of time at various temperatures

Fig.2 V55Ti30Ni15 alloy microhardness as a function of temperature showing the trend between bulk and phase hardness conditions and the indentations of bulk and phase hardness in the set

Fig.3 Optical micrograph of the initial microstructure from the arc-melted cast ingot showing primary V SS dendrites and intermetallic compounds distributed in the interdendritic region detailed features in the SEM inset

Fig.4 X-ray diffraction patterns for V55Ti30Ni15 alloy in the as-cast and heat treated (various temperatures for 18 h) conditions

Table 1 XRD 2θ peak values, d-spacing and lattice constant corresponding to crystal plane (211) of the V SS phase

Heat treatment temperature T (°C)	2θ (°)	d-spacing (nm)	Lattice constant a (nm)
Pure V	77.08	0.12363	0.30274
As-cast	75.61	0.12566	0.30781
750	76.35	0.12463	0.30527
800	76.83	0.12397	0.30365
850	76.25	0.12476	0.30561

Fig.5 SEM images of V55Ti30Ni15 alloy heat treated for 18 h at temperatures: a 750°C, b 800°C, c 850°C, d TEM image of the V-matrix heat treated at 800°C for 18 h and SAED pattern taken from area A in the TEM inset

Fig.6 Relation curve of PFZs widths and temperature for V55Ti30Ni15 alloys heat treated for 18 h

Fig.7 EDS composition profiles along white line for the V-matrix of the as-cast alloy. (Color figure online)

References 26

[1]	J.E. Philpott,Platinum Met. Rev. 29, 12(1985)
[2]	Y. Shirasaki, Y. Ohta, K. Kobayashi, K. Kuroda, Membrane Reformer Technical Bulletin (Mitsubishi Heavy Industries Ltd.,Yokohama, 1996)
[3]	T.M. Adams, J. Mickalonis,Mater. Lett. 61, 817(2007)
[4]	M.D. Dolan, J. Membr.Sci. 362, 12(2010)
[5]	J.W. Phair, R. Donelson,Ind. Eng. Chem. Res. 45, 5657(2006)
[6]	K. Hashi, K. Ishikawa, T. Matsuda, A. Aoki, J. Alloys Compd. 404-406, 273 (2005)
[7]	G. Song, M.D. Dolan, M.E. Kellam, D. Liang, S. Zambelli, J. Alloys Compd. 509, 9322(2011)
[8]	S.I. Jeon, E. Magnone, J.H. Park, Y. Lee,Mater. Lett. 65, 2495(2011)
[9]	S.A. Steward,Review of Hydrogen Isotope Permeability Through Metals, US National Laboratory Report, 1983, UCRL-53441
[10]	K. Ishikawa, S. Tokui, K. Aoki, Intermetallics 17, 109 (2009)
[11]	D. Porter, K. Easterling, Phase Transformations in Metals and Alloys , 2nd edn. ( Chapman &Hall,New York, 1992)
[12]	G. Itoh, M. Kanno, T. Hagiwara, T. Sakamoto,Acta Mater. 47, 3799(1999)
[13]	S. Lee, A. Utsunomiya, H. Akamatsu, K. Neishi, M. Furukawa, Z. Horita, T.G. Langdon,Acta Mater. 50, 553(2002)
[14]	D. Dumont, A. Deschamps, Y. Bréchet,Acta Mater. 51, 2529(2004)
[15]	R. Maldonado, E. Nembach,Acta Mater. 45, 213(1997)
[16]	T. Krol, D. Baither, E. Nembach,Acta Mater. 52, 2095(2004)
[17]	T. Kawabata, O. Izumi,Acta Metall. 24, 817(1976)
[18]	P. Villars, L.D. Calvert, Pearson’s Handbook of Crystallographic Data for Intermetallic Phases,2nd edn. (American Society for Metals,Metals Park, 1991)
[19]	L.A. Jacobson, J. McKittrick, Mater. Sci.Eng.R 11, 355 (1994)
[20]	C. Nishimura, M. Komaki, S. Hwang, M. Amano, J. Alloys Compd.330-332, 902 (2002)
[21]	O.N. Senkov, D.B. Miracle,Mater. Res. Bull. 36, 2183(2001)
[22]	S. Esmaeili, X. Wang, D.J. Lloyd, W.J. Poole, Metall. Mater.Trans.A 34, 751 (2003)
[23]	V. Munjal, A.J. Ardell,Acta Metall. 23, 513(1975)
[24]	Z. Wang, S. Xie, J. Lu, L. Wang, H. Yang, Acta Metall.Sin. (Engl. Lett.) 8, 102(1995)
[25]	W.H. Tian, Acta Metall.Sin. (Engl. Lett.) 14, 313(2001)
[26]	S. Shimizu, Y. Xu, E. Okunishi, S. Tanaka, K. Otsuka, K. Mitose,Mater. Lett. 34, 23(1998)

Precipitation Softening and Precipitate Free Zones of V₅₅Ti₃₀Ni₁₅ Alloys During Heat Treatment

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