Strengthening effects of indentation notches on metallic glasses and their sensitivity to stress triaxiality
Source abstract
Abstract
In this study, a metallic glass sample with an annular indentation notch was successfully constructed by a compression rod cyclic compression strategy using molecular dynamics simulation, and the mechanical behaviors of cut-notched metallic glass samples with the same stress triaxiality and notch size under triaxial compression were comparatively analyzed. It is found that the indentation notch further improves the strength and plasticity of the metallic glass, while it is insensitive to the cut-notched metallic glass with the same notch size. During triaxial compression, rejuvenation and shear softening lead to an increase in free volume, while diffusion and residual compressive stresses lead to a decrease in free volume. The stress triaxiality plays a key regulatory role in their competition and affects the final state of free volume change. This study provides a new theoretical basis and process idea for the enhancement of strength and plasticity of metallic glass.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Metallic Glasses and Amorphous Alloys · Cultural Heritage Materials Analysis · Laser Material Processing Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (46)
Show source-provided references
1. Initiation of shear bands near a stress concentration in metallic glass10.1016/j.actamat.2007.05.054 ↗
2. Localized atomic segregation in the spalled area of a Zr50Cu40Al10 bulk metallic glasses induced by laser-shock experiment10.1088/1361-6463/aaa322 ↗
3. Metallic glasses as structural materials10.1016/j.scriptamat.2005.09.051 ↗
4. Modulating heterogeneity and plasticity in bulk metallic glasses: role of interfaces on shear banding10.1016/j.ijplas.2019.03.007 ↗
5. Structural heterogeneities and mechanical behavior of amorphous alloys10.1016/j.pmatsci.2019.04.005 ↗
6. Difference in compressive and tensile fracture mechanisms of Zr59Cu20Al10Ni8Ti3 bulk metallic glass10.1016/S1359-6454(02)00521-9 ↗
7. In-situ dendrite/metallic glass matrix composites: a review10.1016/j.jmst.2013.05.020 ↗
8. Serration and shear avalanches in a ZrCu based bulk metallic glass composite in different loading methods10.1016/j.jmst.2019.04.014 ↗
9. Ductile fracture in notched bulk metallic glasses10.1016/j.actamat.2017.06.048 ↗
10. Notch toughness of fe-based bulk metallic glass and composites10.1016/j.jallcom.2011.07.016 ↗
11. Deformation behavior and enhanced plasticity of Ti-based metallic glasses with notches10.1080/14786435.2010.498777 ↗
12. Plastic deformability of metallic glass by artificial macroscopic notches10.1016/j.actamat.2010.06.017 ↗
13. Effect of stress triaxiality on plastic deformation of metallic glasses10.1016/j.jallcom.2022.165867 ↗
14. Notch effect of materials: strengthening or weakening?10.1016/j.jmst.2014.04.014 ↗
15. Effects of notches on the deformation behavior of submicron sized metallic glasses: insights from in situ experiments10.1016/j.actamat.2018.05.041 ↗
16. Voronoi volume recovery during plastic deformation in deep-notched metallic glasses10.1016/j.jallcom.2018.10.238 ↗
17. Notch strengthening in nanoscale metallic glasses10.1016/j.actamat.2019.02.044 ↗
18. Effect of notch depth on the mechanical behavior of Cu50Zr50 metallic glasses revealed by molecular dynamics simulations10.1016/j.intermet.2017.10.010 ↗
19. Strain-hardening and failure mechanisms of metallic glasses under triaxial stress10.1016/j.intermet.2024.108210 ↗
20. Indentation behavior of zr-based metallic-glass films via molecular-dynamics simulations10.1007/s11661-010-0358-4 ↗
21. Hardness and shear band evolution in bulk metallic glasses after plastic deformation and annealing10.1016/j.actamat.2008.07.009 ↗
22. Enhancing strength and plasticity by pre-introduced indent-notches in Zr36Cu64 metallic glass: a molecular dynamics simulation study10.1016/j.jmst.2019.10.034 ↗
23. Strain-hardening and suppression of shear-banding in rejuvenated bulk metallic glass10.1038/s41586-020-2016-3 ↗
24. Extreme rejuvenation and softening in a bulk metallic glass10.1038/s41467-018-02943-4 ↗
25. Unexpected creep behavior in a rejuvenated metallic glass10.1016/j.jmst.2023.04.020 ↗
26. Studies in large plastic flow and fracture: with special emphasis on the effects of hydrostatic pressure
27. LAMMPS - a flexible simulation tool for particle-based materials modeling at the atomic, meso, and continuum scales10.1016/j.cpc.2021.108171 ↗
28. Atomic level structure in multicomponent bulk metallic glass10.1103/PhysRevLett.102.245501 ↗
29. Effect of concentration on the structure of isothermally-annealed CuZr metallic glasses10.1080/02670836.2018.1530423 ↗
30. Atomistic origin of size effects in fatigue behavior of metallic glasses10.1016/j.jmps.2017.04.005 ↗
31. Structural processes that initiate shear localization in metallic glass10.1016/j.actamat.2009.07.016 ↗
32. Analytical potential for atomistic simulations of silicon, carbon, and silicon carbide10.1103/PhysRevB.71.035211 ↗
33. Structural relaxation and rejuvenation in a metallic glass induced by shot-peening10.1080/09500830903337919 ↗
34. Identification of rejuvenation and relaxation regions in a Zr-based metallic glass induced by laser shock peening10.1016/j.jmrt.2021.02.025 ↗
35. Structural rejuvenation in a bulk metallic glass induced by severe plastic deformation10.1016/j.actamat.2009.09.021 ↗
36. Shear band evolution and hardness change in cold-rolled bulk metallic glasses10.1016/j.actamat.2010.05.018 ↗
37. Metallic glasses: notch-insensitive materials10.1016/j.scriptamat.2012.01.044 ↗
38. Creation and annihilation of free volume during homogeneous flow of a metallic glass
39. A microscopic mechanism for steady state inhomogeneous flow in metallic glasses10.1016/0001-6160(77)90232-2 ↗
40. The glass transition as a free volume related kinetic phenomenon10.1016/0956-7151(90)90142-4 ↗
41. Inhomogeneous flow and fracture of glassy materials10.1038/nmat2468 ↗
42. Densification and strain hardening of a metallic glass under tension at room temperature10.1103/PhysRevLett.111.135504 ↗
43. Manipulation of relaxation processes in a metallic glass through cryogenic treatment10.1016/j.jallcom.2021.162407 ↗
44. Making metallic glasses plastic by control of residual stress10.1038/nmat1758 ↗
45. High stored energy of metallic glasses induced by high pressure
46. Rejuvenation engineering in metallic glasses by complementary stress and structure modulation10.1038/s41427-023-00509-5 ↗