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Zr-Cu-Ni-Al-Ta glassy matrix composites with enhanced plasticity

Published online by Cambridge University Press:  01 June 2006

Wenbo Dong ,
Haifeng Zhang ,
Wensheng Sun ,
Aimin Wang ,
Hong Li  and
Zhuangqi Hu
Wenbo Dong
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Haifeng Zhang*
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Wensheng Sun
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Aimin Wang
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Hong Li
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Zhuangqi Hu
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

(Zr62Cu15.4Ni12.6) (x = 6–12) in situ glassy composites containing uniformly distributed Ta-rich particles were prepared by arc-melting and copper mould casting. The results show that addition of 6–10 at.% Ta to Zr62Cu15.4Ni12.6Al10 results in dissolution of 2.4 to 4.6 at.% Ta in the glassy matrix, which promotes glass-forming ability, and the remaining Ta precipitates out as body-centered cubic (BCC) Ta-rich particles dispersed on the glassy matrix. The critical diameters for the composites with 6, 8, and 10 at.% Ta are 7, 7, and 6 mm, respectively. At 12 at.% Ta addition, the glass-forming ability is dramatically reduced because of the precipitation of secondary dendritic Ta-rich particles and other nanocrystallites from melts during copper mould casting. Also, owing to the solid-liquid reaction during induction heating, some Ta-rich particles formed in the master alloys will redissolve into the glassy matrix, resulting in a smaller volume fraction of Ta-rich particles in the as-cast glassy rods than that of the corresponding ingots. The glassy matrix composites exhibit enhanced plastic strain of about 7.5 to 22.5% at room temperature. The optimum Ta content in the glassy alloys is determined to be 10 at.%, which corresponds to the highest ultimate stress of 2220 MPa and the largest plastic strain of 22.5%. The plastic strain increases with increasing volume fraction of in situ BCC Ta-rich particles. This is apparently ascribed to the impedance of Ta-rich particles to shear bands. Ta-rich particles seed the initiation of multiple shear bands and block the shear band propagation, leading to intensive multiplication and bifurcation of shear bands.

Keywords

Bulk metallic glass compositeGlass-forming abilityShear bands
Type
Articles
Information
Journal of Materials Research , Volume 21 , Issue 6 , June 2006 , pp. 1490 - 1499
Copyright
Copyright © Materials Research Society 2006

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References

REFERENCES

1.Choi-Yim, H., Johnson, W.L.: Bulk metallic glass matrix composites. Appl. Phys. Lett. 71, 3808 (1997).CrossRefGoogle Scholar
2.Hays, C., Kim, C.P., Johnson, W.L.: Microstructure controlled shear band pattern formation and enhanced plasticity of bulk metallic glasses containing in situ formed ductile phase dendrite dispersions. Phys. Rev. Lett. 84, 2901 (2000).CrossRefGoogle ScholarPubMed
3.He, G., Eckert, J., Loser, W., Schultz, L.: Novel Ti-base nanostructure-dendrite composite with enhanced plasticity. Nat. Mater. 2, 33 (2003).CrossRefGoogle ScholarPubMed
4.Das, J., Löser, W., Kühn, U., Eckert, J., Roy, S.K., Schultz, L.: High strength Zr-Nb-(Cu, Ni, Al) composites with enhanced plasticity. Appl. Phys. Lett. 82, 4690 (2003).CrossRefGoogle Scholar
5.He, G., Zhang, Z.F., Loser, W., Eckert, J., Schultz, L.: Effect of Ta on glass formation, thermal stability and mechanical properties of a Zr52.25Cu28.5Ni4.75Al9.5Ta5 bulk metallic glass. Acta Mater. 51, 2383 (2003).CrossRefGoogle Scholar
6.Fan, C., Ott, R.T., Hufnagel, T.C.: Metallic glass matrix composite with precipitated ductile reinforcement. Appl. Phy. Lett. 81, 1020 (2002).CrossRefGoogle Scholar
7.Hays, C.C., Kim, C.P., Johnson, W.L.: Microstructure controlled shear band pattern formation and enhanced plasticity of bulk metallic glasses containing in situ formed ductile phase dendrite dispersions. Phys. Rev. Lett. 84, 2901 (2000).CrossRefGoogle ScholarPubMed
8.Greer, A.L., Castellero, A., Madge, S.V., Walker, I.T., Wilde, J.R.: Nanoindentation studies of shear banding in fully amorphous and partially devitrified metallic alloys. Mater. Sci. Eng. 375, 1182 (2004).CrossRefGoogle Scholar
9.Chen, M.W., Inoue, A., Fan, C.: Fracture behavior of a nanocrystallized Zr65Cu15Al10Pd10 metallic glass. Appl. Phys. Lett. 74, 2131 (1999).CrossRefGoogle Scholar
10.Kühn, U., Eckert, J., Mattern, N., Schultz, L.: Microstructure and mechanical properties of slowly cooled Zr–Nb–Cu–Ni–Al composites with ductile bcc phase. Mater. Sci. Eng. A 375, 322 (2004).CrossRefGoogle Scholar
11.Ramamurty, U., Jana, S., Kawamura, Y., Chattopadhyay, K.: Hardness and plastic deformation in a bulk metallic glass. Acta Mater. 53, 705 (2005).CrossRefGoogle Scholar
12.Patnaik, M.N.M., Narasimhan, R., Ramamurty, U.: Spherical indentation response of metallic glasses. Acta Mater. 52, 3335 (2004).CrossRefGoogle Scholar
13.Xing, L.Q., Li, Y., Ramesh, K.T., Li, J., Hufnagel, T.C.: Enhanced plastic strain in Zr-based bulk amorphous alloys. Phys. Rev. B 64, 180201 (2001).CrossRefGoogle Scholar
14.Sun, Y.F., Wei, B.C., Wang, Y.R., Li, W.H., Shek, C.H.: Enhanced plasticity of Zr-based bulk metallic glass matrix composite with ductile reinforcement. J. Mater. Res. 20, 2386 (2005).CrossRefGoogle Scholar
15.Tabor, D.: Hardness of Metals (Oxford, Clarendon Press, 1951).Google Scholar
16.Johnson, K.L.: The correlation of indentation experiments. J. Mech. Phys. Solids 18, 115 (1970).CrossRefGoogle Scholar
17.Ott, R.T., Sansoz, F., Molinari, J.F., Almer, J., Ramesh, K.T., Hufnagel, T.C.: Micromechanics of deformation of metallic-glass–matrix composites from in situ synchrotron strain measurements and finite element modeling. Acta Mater. 53, 1883 (2005).CrossRefGoogle Scholar
18.Hufnagel, T.C., Cang, F.R., Ott, T.: Controlling shear band behavior in metallic glasses through microstructural design. Intermetallics 10, 1163 (2002).CrossRefGoogle Scholar
19.McFadden, S.X., Mishra, R.S., Valiev, R.Z., Zhilyaev, A.P., Mukherjee, A.K.: Low temperature superplasticity in nanostructure nickel and metal alloys. Nature 398, 684 (1999).CrossRefGoogle Scholar
20.Lewandowski, J.J., Greer, A.L.: Temperature rise at shear bands in metallic glasses. Nat. Mater. 5, 15 (2006).CrossRefGoogle Scholar