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Phase selection of undercooled solidification of Ni–4.5 wt% B alloy

Published online by Cambridge University Press:  20 December 2013

Junfeng Xu ,
Feng Liu  and
Di Zhang
Junfeng Xu*
Affiliation:
Department of Metal Material Engineering, School of Materials and Chemical Engineering, Xi'an Technological University, Xi'an 710021, People's Republic of China; and State Key Laboratory of Solidification Processing, Northwestern Polytechnic University, Xi'an 710072, People's Republic of China
Feng Liu*
Affiliation:
Department of Metal Material Engineering, School of Materials and Chemical Engineering, Xi'an Technological University, Xi'an 710021, People's Republic of China; and State Key Laboratory of Solidification Processing, Northwestern Polytechnic University, Xi'an 710072, People's Republic of China
Di Zhang
Affiliation:
State Key Laboratory of Solidification Processing, Northwestern Polytechnic University, Xi'an 710072, People's Republic of China
*
a)Address all correspondence to this author. e-mail: liufeng@nwpu.edu.cn
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Abstract

Solidification of undercooled Ni–4.5 wt% B alloy melt was investigated by glass fluxing and cyclic superheating. A maximum melt undercooling up to ΔTp = 283 K has been achieved. If ∆Tp < 175 ± 10 K, the primary solidification is L → Ni3B; the structure consists of Ni3B dendrite + lamellar eutectic; the phase sizes and fractions depend on ∆Tp. If ∆Tp ≥ 175 ± 10 K, the primary solidification is L → Ni/Ni23B6; the structure consists of the dot-phase region + the anomalous eutectic/network boundary; the phase fractions mainly depend on ∆Tr; the dot phases are determined as rod eutectic and dot precipitates, while the network boundary is the divorced eutectic. The solidification pathways show that there is a common critical nucleation temperature, 1227 ± 10 K, for metastable eutectic reaction in hypoeutectic and hypereutectic Ni–Ni3B alloys.

Keywords

cooling curveundercoolingsolidificationeutectic
Type
Articles
Information
Journal of Materials Research , Volume 28 , Issue 24 , 28 December 2013 , pp. 3347 - 3354
Copyright
Copyright © Materials Research Society 2013 

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References

REFERENCES

Murphy, A.G., Browne, D.J., Mirihanage, W.U., and Mathiesen, R.H.: Combined in situ X-ray radiographic observations and post-solidification metallographic characterisation of eutectic transformations in Al–Cu alloy systems. Acta Mater. 61, 4559 (2013).CrossRefGoogle Scholar
Lu, Y., Liu, F., Yang, G., and Zhou, Y.: Composite growth in highly undercooled Ni70.2Si29.8 eutectic alloy. Appl. Phys. Lett. 89, 241902 (2006).CrossRefGoogle Scholar
Shapiro, S. and Ford, J.A.: Crystallography of unidirectionally solidified Ni-Ni3B eutectic alloy. Trans. AIMS 236, 536 (1966).Google Scholar
Ajao, J., Hamar-Thibault, S., and Thibault-Desseaux, J.: Structure observations by high-resolution electron microscopy of Ni-B melt-spun alloys (B<30at%). J. Mater. Sci. 24, 3647 (1989).CrossRefGoogle Scholar
Ajao, J. and Hamar-Thibault, S.: Influence of additions on the solidification behaviour of Ni-B alloys-crystallography of Ni-Ni3B eutectic. J. Mater. Sci. 23, 1112 (1988).CrossRefGoogle Scholar
Baricco, M., Ferrari, E., and Battezzati, L.: Undercooling experiments in a high temperature differential scanning calorimeter. Mat. Res. Soc. Symp. Proc. 398, 81 (1996).CrossRefGoogle Scholar
Battezzati, L., Antonione, C., and Baricco, M.: Undercooling of Ni-B and Fe-B alloys and their metastable phase diagrams. J. Alloys Compd. 247, 164 (1997).CrossRefGoogle Scholar
Kamaeva, L.V. and Lad’yanov, V.I.: Processes of the solidification of Ni–B alloys. Bull. Russ. Acad. 74, 1170 (2010).Google Scholar
Zhang, K., Liu, F., Xu, J.F., and Yang, G.C.: Phase selection and microstructure evolution in nonequilibrium solidification of Fe40Ni40B20 alloy. Metall. Mater. Trans. A 43, 1578 (2012).CrossRefGoogle Scholar
Koseki, T.: Undercooling and rapid solidification of Fe-Cr-Ni ternary alloys. Ph.D. Thesis, Massachusetts Institute of Technology, Cambridge, MA, 1994.Google Scholar
Funke, O., Phanikumar, G., Galenko, P.K., Chernova, L., Reutzel, S., Kolbe, M., and Herlach, D.M.: Dendrite growth velocity in levitated undercooled nickel melts. J. Cryst. Growth 297, 211 (2006).CrossRefGoogle Scholar
Xu, J.F., Liu, F., and Dang, B.: Phase selection in undercooled Ni-3.3 wt pct B alloy melt. Metall. Mater. Trans. A 44, 1401 (2013).CrossRefGoogle Scholar
Xu, J.F., Liu, F., and Zhang, D.: In situ observation of solidification of undercooled hypoeutectic Ni–Ni3B alloy melt. J. Mater. Res. 28, 1891 (2013).CrossRefGoogle Scholar
Verhoeven, J.D. and Gibson, E.D.: The divorced eutectoid transformation in steel. Metall. Mater. Trans. A 29, 1181 (1998).CrossRefGoogle Scholar
Olejnik, E. and Fraś, E.: A visualization of the eutectic solidification process. Arch. Foundry Eng. 7, 131 (2007).Google Scholar
Franke, P., Neuschütz, D.: Franke, B-Ni. P., Neuschütz, D., and Scientific Group Thermodata Europe (SGTE): Springer Materials-The Landolt-Börnstein Database. doi: 10.1007/10757405_11.http://www.springermaterials.com.Google Scholar
Boettinger, W.J., Coriell, S.R., and Trivedi, R.: Application of dendritic growth theory to the interpretation of rapid solidification microstructures. In Rapid Solidification Processing: Principles and Technologies IV; Mehrabian, R. and Parrish, P.A. eds.; Claitor’s Pulishing Division: Baton Rouge, LA, 1988; pp. 13–18.Google Scholar
Jackson, K.A. and Hunt, J.D.: Lamellar and rod eutectic growth. Trans. Metall. Soc. AIME 236, 1129 (1966).Google Scholar
Trivedi, R., Magnin, P., and Kurz, W.: Theory of eutectic growth under rapid solidification conditions. Acta Metall. 35, 971 (1987).CrossRefGoogle Scholar
Li, J.F. and Zhou, Y.H.: Eutectic growth in bulk undercooled melts. Acta Mater. 53, 2351 (2005).CrossRefGoogle Scholar
Trivedi, R. and Kurz, W.: Microstructure selection in eutectic alloy systems. In Solidification Processing of Eutectic Alloys; Szefanescu, D.M., Abbaschian, G.M., and Bayuzick, R.J. eds.; The Metallurgical Society, 1988; pp. 3–34.Google Scholar
Galenko, P.K. and Herlach, D.M.: Diffusionless crystal growth in rapidly solidifying eutectic systems. Phys. Rev. Lett. 96, 150602 (2006).CrossRefGoogle ScholarPubMed
Galenko, P.K.: Solute trapping and diffusionless solidification in a binary system. Phys. Rev. E 76, 031606 (2007).CrossRefGoogle Scholar