The characterization of creep and time-dependent properties of bulk metallic glasses using nanoindentation

Li, W.H.; Shin, Keesam; Lee, C.G.; Wei, Bingchen; Zhang, T.H.; He, Yi

doi:10.1016/j.msea.2007.06.015

Cited by 68 publications

(23 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In nanoindentation [6,[14][15][16][17][18] and compression tests [8] on different glass alloy systems, homogeneous creep deformation has been observed and stress exponents have been measured. However, Li et al have pointed out the unreliability of the stress exponent extracted from nanoindentation data of MGs [19].…”

Section: Introductionmentioning

confidence: 99%

Interface-controlled creep in metallic glass composites

et al. 2017

View full text Add to dashboard Cite

In this work we present molecular dynamics simulations on the creep behavior of Cu 64 Zr 36 metallic glass composites. Surprisingly, all composites exhibit much higher creep rates than the homogeneous glass. The glass-crystal interface can be viewed as a weak interphase, where the activation of shear transformation zones is lower than in the surrounding glass. We observe that the creep behavior of the composites does not only depend on the interface area but also on the orientation of the interface with respect to the loading axis. We propose an explanation in terms of different mean Schmid factors of the interfaces, with the amorphous interface regions acting as preferential slip sites.

show abstract

Section: Introductionmentioning

confidence: 99%

Interface-controlled creep in metallic glass composites

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Study of time-dependent deformation (i.e. creep) of metallic glasses using nanoindentation has been rare [7][8][9]. Apart from its scientific interest [10], creep under submicrometer contact is an issue of practical engineering significance for the applications of MEMS and NEMS.…”

Section: Introductionmentioning

confidence: 99%

Indentation creep of an Fe-based bulk metallic glass

et al. 2009

View full text Add to dashboard Cite

“…As far as viscoelastic characterization is concerned, there are currently several methods that are based on the creep behavior of glass, such as compression creep test (CCT), [14][15][16][17] bending creep test, 18,19 and indentation creep test. [20][21][22][23] Among them the most commonly used is CCT that can be handily implemented on hightemperature testing machines without complex specimen or fixture preparations. 14,15 Based on CCTs, high-temperature viscous and elastic parameters of many types of glasses, such as As 2 S 3 , BK7, and SK5, were successfully measured.…”

mentioning

confidence: 99%

A comprehensive study on frictional dependence and predictive accuracy of viscoelastic model for optical glass using compression creep test

Luo

Zhang

et al. 2019

J Am Ceram Soc

View full text Add to dashboard Cite

Compression creep tests (CCTs) have been widely used in phenomenological characterization of viscoelastic materials such as glasses. However, disturbed by specimen‐tool interface friction, the real stress‐strain data regarding the pure viscoelastic deformation are frequently misestimated in conventional CCTs, causing decreased accuracies of the derived viscoelastic parameters. This study proposes a comprehensive CCT‐based approach to develop a viscoelastic model with weakened frictional disturbance and enhanced predictive accuracy. An integrated calculation procedure is first built to mathematically characterize the frictional and viscoelastic behaviors of glass during compression. Uniaxial CCTs of a typical borosilicate glass (L‐BAL42) are then performed at varied frictional conditions. The quantified coefficients of interface friction indicate that a minor frictional disturbance is achieved when Nickel foils are used as interfacial layers, whereby a more realistic viscoelastic constitutive relation of the glass is derived. The obtained frictional and viscoelastic constants are further incorporated into computational modeling of the CCT and precision molding processes. The demonstrated consistencies between the simulated and measured results (creep displacement and molding force) suggest that, by technically slashing the interface friction and theoretically correcting the friction‐involved stress in CCTs, the frictional disturbance to experimental stress‐strain data can be effectively weakened, and a viscoelastic model of enhanced predictive accuracy can be thus developed.

show abstract

The characterization of creep and time-dependent properties of bulk metallic glasses using nanoindentation

Cited by 68 publications

References 35 publications

Interface-controlled creep in metallic glass composites

Interface-controlled creep in metallic glass composites

Indentation creep of an Fe-based bulk metallic glass

A comprehensive study on frictional dependence and predictive accuracy of viscoelastic model for optical glass using compression creep test

Contact Info

Product

Resources

About