Browsing by Author "Pelletier, J. M."
Now showing items 1-20 of 20
-
A hierarchically correlated flow defect model for metallic glass: Universal understanding of stress relaxation and creep
(2022-07-01)
Article
Open AccessDue to the structurally disordered arrangement of atoms and deviation from thermodynamic equilibrium, the physical and mechanical properties of metallic glasses can vary with time, temperature and magnitude of strain or ... -
Amorphous physics and materials: Secondary relaxation and dynamic heterogeneity in metallic glasses: A brief review
(2017-01-01)
Article
Open AccessUnderstanding mechanical relaxation, such as primary (a) and secondary (ß) relaxation, is key to unravel the intertwined relation between the atomic dynamics and non-equilibrium thermodynamics in metallic glasses. At a ... -
Analysis of the anelastic deformation of high-entropy Pd20Pt20Cu20Ni20P20 metallic glass under stress relaxation and recovery
(2022-04-30)
Article
Open AccessThe anelastic deformation behavior of Pd20Pt20Cu20Ni20 P20 high-entropy metallic glass was probed by monitoring the stress relaxation and recovery processes. The stress relaxation under consecutive strain steps can be ... -
Connection between mechanical relaxation and equilibration kinetics in a high-entropy metallic glass
(American Institute of Physics (AIP), 2024-02-02)
Article
Open AccessThe slow transition from an out-of-equilibrium glass towards a supercooled liquid is a complex relaxation phenomenon. In this Letter, we study the correlation between mechanical relaxation and equilibration kinetics in a ... -
Dynamic mechanical relaxation and thermal creep of high-entropy La30Ce30Ni10Al20Co10 bulk metallic glass
(2021-08-03)
Article
Open AccessDynamic mechanical relaxation is a fundamental tool to understand the mechanical and physical properties of viscoelastic materials like glasses. Mechanical spectroscopy shows that the high-entropy bulk metallic glass ... -
Dynamic mechanical relaxation behavior of Zr35Hf17.5Ti5.5Al12.5Co7.5Ni12Cu10 high entropy bulk metallic glass
(2021-08-30)
Article
Open AccessNon-equiatomic high entropy bulk metallic glasses were reported recently and show unique mechanical and physical properties. Dynamic mechanical relaxation behavior of Zr35Hf17.5Ti5.5Al12.5Co7.5Ni12Cu10 high entropy bulk ... -
Dynamic mechanical relaxation in LaCe-based metallic glasses: influence of the chemical composition
(Multidisciplinary Digital Publishing Institute (MDPI), 2019-09-17)
Article
Open AccessThe mechanical relaxation behavior of the (La0.5Ce0.5)65Al10(CoxCu1-x)25 at% (x = 0, 0.2, 0.4, 0.6, and 0.8) metallic glasses was probed by dynamic mechanical analysis. The intensity of the secondary ß relaxation increases ... -
Effect of minor addition on dynamic mechanical relaxation in ZrCu-based metallic glasses
(2021-02-01)
Article
Open AccessThe dynamic mechanical behavior of Zr50-xCu34Ag8Al8Pdx (x = 0 and 2) bulk metallic glasses was probed by mechanical spectroscopy. The results suggest that microalloying retards the relaxation dynamics. The physical aging ... -
Effect of physical aging and cyclic loading on power-law creep of high-entropy metallic glass
(2022-07-10)
Article
Open AccessThe power-law relationship between creep rate decay and time is one of the intrinsic characteristics of metallic glasses. In the current work, a La30Ce30Ni10Al20Co10 high-entropy metallic glass was selected as the model ... -
Identifying the high entropy characteristic in La-based metallic glasses
(2021-08-05)
Article
Open AccessHigh temperature deformation was probed in a La-based high entropy metallic glass with an evident slow ß relaxation. The correlation between high configurational entropy and high temperature deformation mechanism was ... -
Intrinsic correlation between the fraction of liquidlike zones and the beta relaxation in high-entropy metallic glasses
(American Institute of Physics (AIP), 2022-10-21)
Article
Open AccessLacking the structural information of crystalline solids, the origin of the relaxation dynamics of metallic glasses is unclear. Here, we report the evolution of stress relaxation of high-entropy metallic glasses with ... -
Modelling and physical analysis of the high-temperature rheological behavior of a metallic glass
(2021-11-01)
Article
Open AccessThe high-temperature rheological behavior, around the glass transition temperature, of a Zr48Cu34Ag8Al8Pd2 metallic glass was investigated by strain rate jump experiments. The results show that the plastic deformation ... -
Physical aging effects on the dynamic relaxation behavior and mechanical properties of Cu46Zr46Al8 metallic glass
(2017-12-05)
Article
Open AccessMechanical relaxation of glassy materials is strongly influenced by their mechanical and physical properties. In the current study, dynamic mechanical relaxation of Cu46Zr46Al8 metallic glass has been investigated by ... -
Relaxation of internal friction and shear viscosity in Zr57Nb5Al10Cu15.4Ni12.6 metallic glass
(2020-09-01)
Article
Open AccessRelaxation of internal friction of Zr57Nb5Al10Cu15.4Ni12.6 metallic glass was investigated by mechanical spectroscopy. The stress relaxation of internal friction with different aging temperature was described by ... -
Slow beta relaxation in La-based metallic glasses based on mechanical spectroscopy measurements
(2017-04-01)
Article
Open AccessDynamic mechanical relaxations of La-based metallic glasses were investigated by mechanical spectroscopy. In the framework of the mixing enthalpy of constituent atoms, it was found that ß relaxation was less evident by the ... -
Slow ß relaxation in La-based metallic glasses based on mechanical spectroscopy measurements
(2017-04-01)
Article
Open AccessDynamic mechanical relaxations of La-based metallic glasses were investigated by mechanical spectroscopy. In the framework of the mixing enthalpy of constituent atoms, it was found that ß relaxation was less evident by the ... -
Structural heterogeneities and mechanical behavior of amorphous alloys
(2019-07-01)
Article
Open AccessAlthough the atomic structure of amorphous alloys, which lacks long-range translational symmetry, may appear homogeneous at the macroscopic scale, their local dynamic and/or static properties however vary significantly ... -
Transition from stress-driven to thermally activated stress relaxation in metallic glasses
(American Physical Society, 2016-09-21)
Article
Open AccessThe short-range ordered but long-range disordered structure of metallic glasses yields strong structural and dynamic heterogeneities. Stress relaxation is a technique to trace the evolution of stress in response to a fixed ... -
Unified perspective on structural heterogeneity of a LaCe-based metallic glass from versatile dynamic stimuli
(2020-10-01)
Article
Open AccessDynamic mechanical relaxation, stress relaxation and creep were performed in a La56.16Ce14.04Ni19.8Al10 metallic glass with pronounced relaxation features. The evolution of the microstructural heterogeneity with temperature ... -
Viscoelasticity of Cu- and La-based bulk metallic glasses: Interpretation based on the quasi-point defects theory
(2018-03-14)
Article
Open AccessThe dynamic mechanical relaxation of metallic glasses is closely associated with the physical and mechanical properties. In the current work, the dynamic mechanical relaxation behaviors of Cu46Zr45Al7Y2 and La65Al14(Cu5/ ...
