Ion irradiation enhances the mechanical performance of metallic glasses

Raghavan, R.; Kombaiah, Boopathy; Ghisleni, R.; Pouchon, Manuel A.; Ramamurty, Upadrasta; Michler, Johann

doi:10.1016/j.scriptamat.2009.12.013

Cited by 96 publications

(45 citation statements)

References 19 publications

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“…It has been shown that MG materials are sensitive to high-energy irradiation of electrons, neutrons and ions, and that irradiation can lead to a change in short range ordering (SRO), 23 decreased creep resistance, 24 and enhanced plasticity. 25 In addition, simulation results have also demonstrated irradiation-induced structural modifications in terms of local topological orders and accompanied changes in mechanical properties, such as Young's modulus in MG systems. 26,27 Recently, it has been shown that irradiation processing can even lead to tensile ductility in Pt-based MG nanowires.…”

Section: Suppression Of Shear Banding In Amorphous Zrcual Nanopillarsmentioning

confidence: 95%

Suppression of shear banding in amorphous ZrCuAl nanopillars by irradiation

Xiao

Huang

Shi

2013

Journal of Applied Physics

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Using molecular dynamics simulations, model Zr50Cu40Al10 metallic glass (MG) nanopillars were subjected to simulated irradiation processes followed by uniaxial compression tests. As the intensity or dosage of irradiation increases, the plastic deformation mode of the MG nanopillars transits from localized shear banding to homogeneous shear flow. The suppression of shear banding in MG nanopillars is due to irradiation-induced structural disordering. Furthermore, a correlation is found between the average potential energy of MG nanopillars and their deformation modes, common to both irradiation processing and thermal processing. Our results imply that the homogeneous shear flow observed in experimental MG nanopillars carved by focused ion beam may be due to irradiation damage instead of size effect.

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Section: Suppression Of Shear Banding In Amorphous Zrcual Nanopillarsmentioning

confidence: 95%

Suppression of shear banding in amorphous ZrCuAl nanopillars by irradiation

Xiao

Huang

Shi

2013

Journal of Applied Physics

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“…Ribbon samples can be bent by 180°without fracture 7 . Meanwhile, there are many methods that have been developed to increase the energy level or rejuvenate metallic glasses 8,9 : irradiation, heavy plastic deformation, elastostatic loading, simple heating above T g and subsequent fast cooling 10 , etc. Recently, another method for metallic glass rejuvenation was found 11 .…”

Section: Introductionmentioning

confidence: 99%

On cryothermal cycling as a method for inducing structural changes in metallic glasses

et al. 2018

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The influence of cryothermal treatment on the mechanical properties of metallic glasses with different compositions was investigated in the present work. It was found that cryothermal cycling can induce rejuvenation as well as relaxation of the metallic glasses. The local apparent Young's modulus and its spatial distribution width on the surface of the metallic glass increase after cryothermal cycling, while in the bulk the effect depends on the glass composition. It appeared that this increase is temporary and disappears after a period of room temperature aging. This effect is connected with a large distribution of relaxation times in the metallic glasses due to their heterogeneous structure and the formation of complex native oxides on the outer surfaces of the glasses. Our findings reveal that a cryothermal cycling treatment can improve or degrade the plasticity of a metallic glass, and the atomic bond structure appears to be very important for the outcome of the treatment.

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“…Therefore, the effect of ion irradiation on the mechanical properties in bulk metallic glasses (BMGs) has also been reported. Significant reduction in strength has been found in a Ni ion irradiated Zr 41.2 Ti 13.8 Cu 12.5 Ni 10 Be 22.5 BMG, which was explained with the enhancement in the free-volume content 8 . However, in other works, distinct surface hardening in Zr 55 Cu 30 Ni 5 Al 10 irradiated by Co [9] or Ar [10] ions was demonstrated, which was attributed to the denser packing structures formed under ion irradiation.…”

Section: Introductionmentioning

confidence: 88%

Effect of ion irradiation on mechanical behaviors of Ti40Zr25Be30Cr5 bulk metallic glass

Hu¹,

Zhao

Hu³

et al. 2012

Mat. Res.

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In this work, the effect of C 4+ and Cl 4+ ion irradiation with 25 MeV energy on the hardness and shear banding feature of Ti 40 Zr 25 Be 30 Cr 5 bulk metallic glass was studied. Depth-sensing nanoindetation and microindentation were applied for characterizing the multiple-scaled hardness and shear band patterns during plastic deformation. It is shown that the Cl 4+ ion irradiation leads to an obvious softening of the sample surface, and distinctly affects the serrated flow feature during plastic deformation. In contrast, C 4+ ions have little effect on the hardness and shear band patterns. Besides, the mechanism for the change of the mechanical properties and plastic deformation behavior after ion irradiation was also discussed.

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Ion irradiation enhances the mechanical performance of metallic glasses

Cited by 96 publications

References 19 publications

Suppression of shear banding in amorphous ZrCuAl nanopillars by irradiation

Suppression of shear banding in amorphous ZrCuAl nanopillars by irradiation

On cryothermal cycling as a method for inducing structural changes in metallic glasses

Effect of ion irradiation on mechanical behaviors of Ti40Zr25Be30Cr5 bulk metallic glass

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