Control Shear Banding in Metallic Glasses to Enable Tensile Ductility: A Brief Review
Round 1
Reviewer 1 Report
Comments and Suggestions for AuthorsThe manuscript provides a structured overview of strategies to control shear banding in metallic glasses to enhance tensile ductility. The categorization of toughening mechanisms (preventing initiation versus restraining propagation) is sound and supported by relevant literature. Nevertheless, the current draft contains significant editorial and structural errors that disrupt the narrative flow and must be corrected before further consideration. My remarks related to the paper are as follow:
Remark No.1
The manuscript focuses almost exclusively on extrinsic and macro-structural toughening while neglecting fundamental intrinsic strategies. The review must be supplemented with a discussion on the classic Lewandowski criterion (the correlation of the μ/B ratio and global Poisson's ratio with plasticity) and the use of minor alloying additions to intentionally disrupt icosahedral packing and induce strain-distributing "soft spots". Please add an additional paragraph related to this topic.
Remark No.2
The text lacks coverage of critical recent advancements that inherently suppress shear banding without macroscopic structural modification. The authors should briefly address High-Entropy Metallic Glasses (HEMGs), where severe atomic-level topological distortion provides intrinsic structural heterogeneity, and Thin Film Metallic Glasses (TFMGs), where substrate-induced geometric confinement alters shear band dynamics well beyond the scope of freestanding nanopillars. Please add an additional paragraph related to this topic.
Remark No.3
The text references Figure 1 and then immediately jumps to Figure 3. Figure 2 is missing entirely from the manuscript
Remark No.4 Syntax error
On page 13, the sentence "Recently, demonstrated that rejuvenation of BMGs under triaxial compression..." lacks a grammatical subject.
Remark No.5
In the descriptive text immediately following Equation 1, the equivalent von Mises stress is incorrectly denoted as σεa, whereas the equation itself correctly utilizes σeq. Please maintain the totation consistency.
Remark No.6
Please remove the trailing hyphen in the header "MGMCS-" on Figure 6
Remark No.7
The caption of Fig.9 sounds like a continuous narrative paragraph. Please change it.
Remark No.8
Correct the spelling of "pressur" to "pressure" on page 13
Remark No.9
Ensure all entries in the reference list include DOI numbers to comply with standard production and cross-referencing requirements.
Author Response
See the attachment for details.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
Comments and Suggestions for AuthorsIn their review, the authors analyze some nanosizing and metamaterial strategies to hinder the formation of mature shear bands, to highlight several typical toughening strategies that have broadened the ductility envelope of some high-strength materials. The introduction and review of the background to the work is very good and comprehensive. For this reason, they were able to conclude satisfactory aspects of the work. I suggest publishing the manuscript because it is novel and makes a valuable contribution to the study of high-strength materials. Although, I would first like clarification on certain aspects of the work carried out.
To authors
- In lines 122 to 124, could you briefly describe what these studies on improving the deformability of MGs are about?
- In lines 153 to 156, Is the mechanism or cause of this behavior known?
- In lines 160 to 162, do you not consider geometry to be important in this case as well?
- In lines 166 to 171, could you please explain what those extrinsic dimensions are?
- Could you please give some examples of mechanical metamaterials?
- Lines 214 to 216, could you explain in a bit more detail the mechanism behind this mechanical behavior?
- What does it mean, physically speaking, for a material to have a negative Poisson's ratio?
- In lines 269 to 272, what would be the conditions for these heat treatments—times, temperatures, and heating and cooling rates?
- In lines 328 to 330, Do you believe this limitation is due solely to the presence of fine grains, or could the mechanism of strain hardening also be involved?
- Is there a criterion that can be used to determine the method for rejuvenating an alloy?
- What are the types of structural defects that can be introduced during mechanical rejuvenation, and how can they be controlled in mechanical processes?
Author Response
See the attachment for details.
Author Response File: Author Response.pdf
Reviewer 3 Report
Comments and Suggestions for AuthorsThe authors presented a comprehensive literature review on the shear banding behavior of metallic glasses, with particular emphasis on the mechanisms responsible for shear band initiation and propagation. The manuscript also summarizes different approaches reported in the literature to prevent or mitigate shear banding behavior, including alloy design, composite formation, thermal treatment, and microstructural modification. The topic is scientifically relevant because controlling shear banding is essential for improving the ductility and mechanical reliability of metallic glasses. Overall, the review provides a useful overview of current research trends and strategies aimed at enhancing the structural performance of metallic glass materials. However, the manuscript need improvement in order to be more understandable, therefore I recommend major revision. My detailed comments are in the supportive file.
Comments for author File: Comments.pdf
The English language throughout the manuscript requires improvement, as some sentences are too short and lack clarity, while others contain repetitive use of the same words or expressions. The overall readability and scientific flow of the manuscript would benefit from careful language revision and stylistic editing.
Author Response
See the attachment for details.
Author Response File: Author Response.pdf
Round 2
Reviewer 3 Report
Comments and Suggestions for AuthorsAuthors have answered to all my questions and thus improved quality of the revised version of manuscript.
