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Damage-tolerant Zr–Cu–Al-based bulk metallic glasses with record-breaking fracture toughness

Published online by Cambridge University Press:  04 August 2014

Jian Xu  and
Evan Ma
Jian Xu*
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Evan Ma*
Affiliation:
Department of Materials Science and Engineering, The Johns Hopkins University, Baltimore, Maryland 21218, USA
*
a)Address all correspondence to these authors. e-mail: [email protected]
b)e-mail: [email protected]
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Abstract

Bulk metallic glasses (BMGs) exhibit high yield strength but little tensile ductility. For this class of materials, damage tolerance is a key mechanical design parameter needed for their engineering use. Recently we have discovered a correlation between the local structural characteristics in the glass and the propensity for shear transformations. Based on the dependence of glass structure on alloy composition, zirconium (Zr)-rich Zr–titanium (Ti)–copper (Cu)–aluminum (Al) compositions are predicted to be more prone to spread-out plastic deformation and hence profuse shear banding. This structural perspective has guided us to locate a Zr61Ti2Cu25Al12 (ZT1) BMG that exhibits a record-breaking fracture toughness, on par with the palladium (Pd)-based BMG recently developed at Caltech. At the same time, the new BMG consists of common metals and has robust glass-forming ability. Interestingly, the ZT1 BMG derives its high toughness from its high propensity for crack deflection and local loading-mode change (from mode I to substantially mode II) at the crack tip due to extensive shear band interactions. A crack-resistance curve (R-curve) has been obtained following American Society for Testing and Materials (ASTM) standards, employing both “single-specimen” and “multiple-specimen” techniques as well as fatigue precracked specimens. The combination of high strength and fracture toughness places ZT1 atop all engineering metallic alloys in the strength–toughness Ashby diagram, pushing the envelop accessible to a structural material in terms of its damage tolerance.

Keywords

metallic glassesfracture toughnessR-curvecrack growthzirconium alloys
Type
Invited Feature Review
Information
Journal of Materials Research , Volume 29 , Issue 14 , 28 July 2014 , pp. 1489 - 1499
Copyright
Copyright © Materials Research Society 2014 

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References

REFERENCES

Greer, A.L., Cheng, Y.Q., and Ma, E.: Shear bands in metallic glasses. Mater. Sci. Eng., R 74, 71 (2013).CrossRefGoogle Scholar
Ashby, M.F. and Greer, A.L.: Metallic glasses as structural materials. Scr. Mater. 54, 321 (2006).CrossRefGoogle Scholar
Schuh, C.A., Hufnagel, T.C., and Ramamurty, U.: Mechanical behavior of amorphous alloys. Acta Mater. 55, 4067 (2007).Google Scholar
Xu, J., Ramamurty, U., and Ma, E.: The fracture toughness of bulk metallic glasses. JOM 62, 10 (2010).Google Scholar
Launey, M.E., Hofmann, D.C., Suh, J.Y., Kozachkov, H., Johnson, W.L., and Ritchie, R.O.: Fracture toughness and crack-resistance curve behavior in metallic glass-matrix composites. Appl. Phys. Lett. 94, 241910 (2009).Google Scholar
Ritchie, R.O.: The conflicts between strength and toughness. Nat. Mater. 10, 817 (2011).Google Scholar
Demetriou, M.D., Launey, M.E., Garrett, G., Schramm, J.P., Hofmann, D.C., Johnson, W.L., and Ritchie, R.O.: A damage-tolerant glass. Nat. Mater. 10, 123 (2011).Google Scholar
Lewandowski, J.J., Wang, W.H., and Greer, A.L.: Intrinsic plasticity or brittleness of metallic glasses. Philos. Mag. Lett. 85, 77 (2005).CrossRefGoogle Scholar
He, Q., Cheng, Y-Q., Ma, E., and Xu, J.: Locating bulk metallic glasses with high fracture toughness: Chemical effects and composition optimization. Acta Mater. 59, 202 (2011).Google Scholar
ASTM E1820-08: Standard Test Method for Measurement of Fracture Toughness (ASTM International, West Conshohocken, PA, 2008); pp. 1–48.Google Scholar
Anderson, T.L.: Fracture Mechanics: Fundamentals and Applications, 3rd ed.; CRC Press: New York, 2004.Google Scholar
Cheng, Y.Q., Cao, A.J., Sheng, H.W., and Ma, E.: Local order influences initiation of plastic flow in metallic glass: Effects of alloy composition and sample cooling history. Acta Mater. 56, 5263 (2008).Google Scholar
Cheng, Y.Q., Cao, A.J., and Ma, E.: Correlation between the elastic modulus and the intrinsic plastic behavior of metallic glasses: The roles of atomic configuration and alloy composition. Acta Mater. 57, 3253 (2009).Google Scholar
Zhu, Z-D., Ma, E., and Xu, J.: Elevating the fracture toughness of Cu49Hf42Al9 bulk metallic glass: Effects of cooling rate and frozen-in excess volume. Intermetallics 46, 164 (2014).Google Scholar
Zhang, L., Cheng, Y.Q., Cao, A.J., Xu, J., and Ma, E.: Bulk metallic glasses with large plasticity: Composition design from the structural perspective. Acta Mater. 57, 1154 (2009).Google Scholar
Cheng, Y.Q., Ma, E., and Sheng, H.W.: Atomic level structure in multicomponent bulk metallic glass. Phys. Rev. Lett. 102, 245501 (2009).Google Scholar
He, Q. and Xu, J.: Locating malleable bulk metallic glasses in Zr-Ti-Cu-Al alloys with calorimetric glass transition temperature as an indicator. J. Mater. Sci. Technol. 28, 1109 (2012).CrossRefGoogle Scholar
He, Q., Shang, J.K., Ma, E., and Xu, J.: Crack-resistance curve of a Zr–Ti–Cu–Al bulk metallic glass with extraordinary fracture toughness. Acta Mater. 60, 4940 (2012).CrossRefGoogle Scholar
Flores, K.M. and Dauskardt, R.H.: Mode II fracture behavior of a Zr-based bulk metallic glass. J. Mech. Phys. Solids 54, 2418 (2006).Google Scholar
Tandaiya, P., Ramamurty, U., and Narasimhan, R.: Mixed mode (I and II) crack tip fields in bulk metallic glasses. J. Mech. Phys. Solids 57, 1880 (2009).Google Scholar
Varadarajan, R., Thurston, A.K., and Lewandowski, J.J.: Increased toughness of zirconium-based bulk metallic glasses tested under mixed mode conditions. Metall. Mater. Trans. A 41A, 149 (2010).Google Scholar
Flores, K.M. and Dauskardt, R.H.: Enhanced toughness due to stable crack tip damage zones in bulk metallic glass. Scr. Mater. 41, 937 (1999).CrossRefGoogle Scholar
Cheng, Y.Q., Sheng, H.W., and Ma, E.: Relationship between structure, dynamics, and mechanical properties in metallic glass-forming alloys. Phys. Rev. B 78, 014207 (2008).Google Scholar
Cheng, Y.Q. and Ma, E.: Atomic-level structure and structure–property relationship in metallic glasses. Prog. Mater. Sci. 56, 379 (2011).Google Scholar
Ding, J., Cheng, Y.Q., and Ma, E.: Full icosahedra dominate local order in Cu64Zr36 metallic glasses and liquids. Acta Mater. 69, 343 (2014).CrossRefGoogle Scholar

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