Now showing items 1-18 of 18

    • Amorphous physics and materials: Secondary relaxation and dynamic heterogeneity in metallic glasses: A brief review 

      Qiao, Jichao; Wang, Q; Crespo Artiaga, Daniel; Yang, Y; Pelletier, J. M. (2017-01-01)
      Article
      Open Access
      Understanding 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 ...
    • Dynamic mechanical relaxation and thermal creep of high-entropy La30Ce30Ni10Al20Co10 bulk metallic glass 

      Zhang, LangTing; Duan, Yajuan; Crespo Artiaga, Daniel; Pineda Soler, Eloi; Wang, Yun-Jiang; Pelletier, J. M.; Qiao, Jichao (2021-08-03)
      Article
      Open Access
      Dynamic 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 in LaCe-based metallic glasses: influence of the chemical composition 

      Liu, Minna; Qiao, Jichao; Hao, Qi; Chen, Yinghong; Yao, Yao; Crespo Artiaga, Daniel; Pelletier, J. M. (Multidisciplinary Digital Publishing Institute (MDPI), 2019-09-17)
      Article
      Open Access
      The 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 

      Cheng, Yu; Hao, Qi; Qiao, Jichao; Crespo Artiaga, Daniel; Pineda Soler, Eloi; Pelletier, J. M. (2021-02-01)
      Article
      Restricted access - publisher's policy
      The 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 

      Zhang, LangTing; Duan, Yajuan; Pineda Soler, Eloi; Kato, Hidemi; Pelletier, J. M.; Qiao, Jichao (2022-07-10)
      Article
      Restricted access - publisher's policy
      The 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 

      Zhang, LangTing; Duan, Yajuan; Crespo Artiaga, Daniel; Pineda Soler, Eloi; Wada, T.; Kato, Hidemi; Pelletier, J. M.; Qiao, Jichao (2021-08-05)
      Article
      Open Access
      High 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 ...
    • Inelastic deformation of metallic glasses under dynamic cyclic loading 

      Duan, Y.J.; Qiao, Jichao; Wada, T.; Kato, Hidemi; Wang, J. y.; Pineda Soler, Eloi; Crespo Artiaga, Daniel (2021-03-15)
      Article
      Restricted access - publisher's policy
      Dynamic mechanical analysis was performed in two metallic glasses that show markedly distinct ß relaxation features. The confined flow defects of free-volume zones and the inelastic deformation behavior result into a ...
    • Link between shear modulus and enthalpy changes of Ti16.7Zr16.7Hf16.7Cu16.7Ni16.7Be16.7 high entropy bulk metallic glass 

      Duan, Y.J.; Qiao, Jichao; Crespo Artiaga, Daniel; Goncharova, E.V.; Makarov, A.S.; Afonin, G.V.; Khonik, V.A. (2020-02-29)
      Article
      Open Access
      Mechanical and thermal properties of materials are intricately linked. Particularly, this fully applies to metallic glasses. In this work, we study shear modulus behavior and heat effects occurring upon heating up of ...
    • Modeling of the Sub-Tg Relaxation Spectrum of Pd42.5Ni7.5Cu30P20 Metallic Glass 

      Liu, Chaoren; Pineda Soler, Eloi; Crespo Artiaga, Daniel; Qiao, Jichao (2016-03-17)
      Article
      Open Access
      In this work we study the mechanical relaxation spectrum of Pd42.5Ni7.5Cu30P20 metallic glass. The effect of aging on the relaxation behavior is analyzed by measuring the internal friction during consecutive heating runs. ...
    • Physical aging effects on the dynamic relaxation behavior and mechanical properties of Cu46Zr46Al8 metallic glass 

      Qiao, Jichao; Feng, S. D.; Pelletier, J. M.; Crespo Artiaga, Daniel; Pineda Soler, Eloi; Yao, Yao (2017-12-05)
      Article
      Open Access
      Mechanical 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 

      Duan, Y.J.; Qiao, Jichao; Crespo Artiaga, Daniel; Pelletier, J. M. (2020-09-01)
      Article
      Restricted access - publisher's policy
      Relaxation 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 

      Qiao, Jichao; Pelletier, J. M.; Li, Ning; Crespo Artiaga, Daniel; Yao, Yao (2017-04-01)
      Article
      Open Access
      Dynamic 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 

      Qiao, Jichao; Pelletier, J. M.; Li, Ning; Crespo Artiaga, Daniel; Yao, Yao (2017-04-01)
      Article
      Open Access
      Dynamic 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 

      Qiao, Jichao; Wang, Q; Pelletier, J. M.; Kato, Hidemi; Casalini, Riccardo; Crespo Artiaga, Daniel; Pineda Soler, Eloi; Yao, Yao; Yang, Y (2019-07-01)
      Article
      Open Access
      Although 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 ...
    • Sub-T-g relaxation times of the alpha process in metallic glasses 

      Liu, Chaoren; Pineda Soler, Eloi; Crespo Artiaga, Daniel; Qiao, Jichao; Evenson, Zach; Ruta, Beatrice (2017-09-01)
      Article
      Open Access
      The current view of structural relaxation in metallic glasses assumes the presence of primary and secondary processes with different activation energies. While the faster, secondary process can be well characterized in the ...
    • Transition from stress-driven to thermally activated stress relaxation in metallic glasses 

      Qiao, Jichao; Wang, Yun-Jiang; Zhao, L. Z.; Dai, L. H.; Crespo Artiaga, Daniel; Pelletier, J. M.; Keer, L. M.; Yao, Y (American Physical Society, 2016-09-21)
      Article
      Open Access
      The 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 

      Xu, Z R; Yang, D. S.; Qiao, Jichao; Pelletier, J. M.; Crespo Artiaga, Daniel; Pineda Soler, Eloi; Wang, Yun-Jiang (2020-10-01)
      Article
      Restricted access - publisher's policy
      Dynamic 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 

      Qiao, Jichao; Chen, Y.X.; Pelletier, J. M.; Kato, H.; Crespo Artiaga, Daniel; Yao, Yao; Khonik, V. A. (2018-03-14)
      Article
      Open Access
      The 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/ ...