Creep Behavior of Core (Metal)–Shell (Metallic Glass) Structure: a Molecular Dynamics Simulation Study

Springer Science and Business Media LLC - Tập 7 - Trang 405-410 - 2021
Ganesh Katakareddi1, Natraj Yedla1
1Computational Materials Engineering Group, Department of Metallurgical and Materials Engineering, National Institute of Technology Rourkela, Rourkela, India

Tóm tắt

Core–shell structures have gained importance due to the multifunctional nature achieved by the combined properties of the core and shell. In the present study, the creep behavior of the Cu (core)–Cu50Zr50 metallic glass (shell) structure has been investigated using molecular dynamic simulations. Embedded atom method potential is used to model the interactions between Cu and Zr atoms. Model size of 100 Å diameter × 800 Å length is used for the study (integration timestep = 1 fs). The tensile-creep simulations are carried at a constant temperature of 300 K, subjecting to different stresses (800 MPa, 1000 MPa, and 1200 MPa). Also, the temperature effect (300 K, 400 K, 500 K) is investigated at a constant stress of 1000 MPa. The creep curves show short primary, long-steady-state regions after instantaneous strain upon loading. The structures do not show any tertiary creep even after a simulation time of 3000 ps indicating good creep life. The strain rates in the steady-state region increase with stress and are found to be 3.43 × 106 s−1, 4.42 × 106 s−1, and 11.37 × 106 s−1, respectively. Also, as the temperatures increase, the strain rates increase, i.e., 7.4 × 106 s−1 at 400 K and 8.31 × 106 s−1 at 500 K. Activation energy (Q) and stress exponent (n) has been calculated, and the values obtained are: Q = 4.157 kJ/mol and n $$\approx 2$$ . Voronoi polyhedra analysis is performed to study the atomic structure of metallic glass shell. The fraction of Cu-centered icosahedral with index (0 0 12 0), the key structural motif, has slightly increased. An increase in the fraction value indicates that there are newborn icosahedral during creep deformation.

Tài liệu tham khảo

Berendsen HJC, Postma JPM, Van Gunsteren WF, Dinola A, Haak JR (1984) Molecular dynamics with coupling to an external bath. J Chem Phys 81(8):3684–3690 Chen Hu, Tianqi HC, Li M, Zhao Z (2017) Cu@Sn core-shell structure powder preform for high-temperature applications based on transient liquid phase bonding. IEEE Trans Power Electron 32(1):441–451 Dieter GE, David JB (1976) Mechanical metallurgy, vol 3. McGraw-hill, New York Gupta P, Yedla N (2019) Tensile-compression loading and pre-strain effects on the evolution of stacking fault tetrahedra, dislocation density, and free volume in crystal-amorphous thin film interface: a large-scale molecular dynamics study. J Non-Cryst Solids 514(March):25–34 Hoover WG (1985) Canonical dynamics: equilibrium phase-space distributions william. Phys Rev A 31(4):1695–1697 Jia H, Liu F, An Z, Li W, Wang G, Chu JP, Jang JSC, Gao Y, Liaw PK (2014) Thin-film metallic glasses for substrate fatigue-property improvements. Thin Solid Films 561:2–27 Kalcher C, Brink T, Rohrer J, Stukowski A, Albe K (2017) Interface-controlled creep in metallic glass composites. Acta Mater 141:251–260 Lauhon LJ, Gudiksen MS, Wang D, Lieber CM (2002) Epitaxial core—shell and core—multishell nanowire heterostructures_Lieber.Pdf_Unknown.Pdf. Nature 1331(2001):57–61 Liu W, Zhong W, Du YW (2008) Magnetic nanoparticles with core/shell structures. J Nanosci Nanotechnol 8(6):2781–2792 Liu G, An Y, Guo Z, Chen J, Hou G, Chen J (2012) Structure and corrosion behavior of iron-based metallic glass coatings prepared by LPPS. Appl Surf Sci 258(14):5380–5386 Mendelev MI, Sordelet DJ, Kramer MJ (2007) Using atomistic computer simulations to analyze x-ray diffraction data from metallic glasses. J Appl Phys 102(4):043501 Nam VB, Daeho L (2016) Copper nanowires and their applications for flexible, transparent conducting films: a review. Nanomaterials 6(3):47 Nie K, Wen Ping Wu, Zhang XL, Yang SM (2017) Molecular dynamics study on the grain size, temperature, and stress dependence of creep behavior in nanocrystalline nickel. J Mater Sci 52(4):2180–2191 Nosé S, Nosi N (1984) Molecular physics: an international journal at the interface between chemistry and physics a molecular dynamics method for simulations in the canonical ensemble a molecular dynamics method for simulations in the canonical ensemblet. Int J Interface between Chem Phys Mol Phys 52(2):255–268 Riet AA, Van Orman JA, Lacks DJ (2021) A molecular dynamics study of grain boundary diffusion in MgO. Geochim Cosmochim Acta 292:203–216 Sharma P, Kaushik N, Kimura H, Saotome Y, Inoue A (2007) Nano-fabrication with metallic glass—an exotic material for nano-electromechanical systems. Nanotechnology 18(3):035302 Sohrabi N, Panikar RS, Jhabvala J, Buch AR, Mischler S, Logé RE (2020) Laser coating of a Zr-based metallic glass on an aluminum substrate. Surf Coat Technol 400:126223 Stukowski A (2010) Visualization and analysis of atomistic simulation data with OVITO-the open visualization tool. Model Simul Mater Sci Eng 18(1):015012 Wakeda M, Shibutani Y, Ogata S, Park J (2007) Relationship between local geometrical factors and mechanical properties for Cu-Zr amorphous alloys. Intermetallics 15(2):139–144 Wang F, Li JM, Huang P, Wang WL, Lu TJ, Xu KW (2013) Nanoscale creep deformation in Zr-based metallic glass. Intermetallics 38:156–160 Wei YD, Peng P, Yan ZZ, Kong LT, Tian ZA, Dong KJ, Liu RS (2016) A comparative study on local atomic configurations characterized by cluster-type-index method and voronoi polyhedron method. Comput Mater Sci 123:214–223 Wu W-P, Şopu D, Yuan X, Adjaoud O, Song KK, Eckert J (2021) Atomistic understanding of creep and relaxation mechanisms of Cu64Zr36 metallic glass at different temperatures and stress levels. J Non-Cryst Solids 559:120676 Zhang H, Yong Hu, Hou G, An Y, Liu G (2014) The effect of high-velocity oxy-fuel spraying parameters on microstructure, corrosion and wear resistance of Fe-based metallic glass coatings. J Non Cryst Solids 406:37–44