Shear Band-Induced Internal Surface Structures in a Vitreloy Bulk Metallic Glass Deformed by High-Pressure Torsion
Zsolt Kovács, Talaye Arjmandabasi, Gábor Erdei, Erhard Schafler, Ádám Révész
TL;DR
This study examines how high-pressure torsion deforms a metallic glass, revealing internal surface structures and strain localization.
Contribution
The paper introduces a surface distortion model validated experimentally to quantify strain localization in metallic glasses.
Findings
Compressive strain gradients of 0.2–0.4 develop toward the disk edge during deformation.
Only part of the nominal shear deformation occurs in the disk interior.
The surface distortion model aligns with experimental z-profile reconstructions.
Abstract
In the present investigation, high stability Vitreloy Zr44Ti11Cu10Ni10Be25 bulk metallic glass has been subjected to severe shear deformation by high-pressure torsion for 0.1 revolutions under an applied pressure of 4 and 8 GPa. The fully glassy nature of the as-cast glass has been confirmed by X-ray powder diffraction and differential scanning calorimetry. Deformation-induced surface features on an internal plane of the deformed disk-shaped specimens were studied in detail at the macroscopic level by optical reconstruction method and at microscopic scales by white-light optical profilometry. Shear and compressive strain components were measured based on surface changes and it was determined that compressive strain gradient with 0.2–0.4 strain change builds up toward the disk edge, while only part of the nominal shear deformation occurs in the disk interior. The effect of strain…
Genes, proteins, chemicals, diseases, species, mutations and cell lines named across the full text — each resolved to its canonical identifier and authoritative record.
Click any figure to enlarge with its caption.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsMetallic Glasses and Amorphous Alloys · Laser-Ablation Synthesis of Nanoparticles · Laser Material Processing Techniques