Study on SLM Forming Parameters of Al2O3/CoCr Metal Matrix Composites
Round 1
Reviewer 1 Report
Comments and Suggestions for AuthorsThe article is about SLM Forming Parameters of Al₂O₃/CoCr Metal Matrix 2
Composites. However, there are several things that could be done to improve the paper.
- Please double-check before submitting. There are typographical errors, such as mixed languages; for example, Figure 1b contains Chinese. Figure 12 Figure 12
- Please explain the sentence "the elements of the second layer are "killed"" in more academic English.
- Please give rationale of the paramater selection.
- Figure 5 is missing.
- In 3.4. characterization method there is FESEM characterization. However, there is only optical microscopy analysis.
- Please use consistent term for laser energy density and laser volumetric energy density. LED in Figure 11 and Table 5 are different. Please clarify.
Author Response
Please see the attachment.
Dear Editor and Reviewers:
On behalf of my co-authors, we are very grateful to you for giving us an opportunity to revise our manuscript. we appreciate you very much for your positive and constructive comments and suggestions on our manuscript entitled " Study on SLM Forming Parameters of Al₂O₃/CoCr Metal Matrix Composites " (ID: coatings-3800603).
We have studied reviewers' comments carefully and tried our best to revise our manuscript according to the comments. The following are the responses and revisions I have made in response to the reviewer' questions and suggestions on an item-by-item basis. Thanks again to the hard work of the editor and reviewer!
Author Response File: 
Author Response.pdf
Reviewer 2 Report
Comments and Suggestions for AuthorsThis manuscript investigates the effects of temperature field simulation and laser energy density on the selective laser melting (SLM) fabrication of Al₂O₃/CoCr metal matrix composites. Numerical modeling, experimental characterization, and the effects of process parameters are discussed together. However, there are some methodological and presentational shortcomings and areas for improvement.
1) Many studies on SLM are listed with references, but the original contribution is not clearly stated.
2) Previous studies on Al₂O₃/CoCr composites have been limited. The reasons for choosing this system and its advantages should be clarified.
3) If there is a claim such as "This was done for the first time in this study," it should be presented clearly and concretely.
4) No mesh sensitivity analysis was performed: This calls into question the accuracy of the results. Different mesh sizes should be tested to ensure simulation accuracy, or a similar analysis from a previous study should be presented.
5) The source of thermophysical properties (thermal conductivity, specific heat, etc.) is not fully specified; is it experimental or from the literature?
6) Assumptions such as “the molten metal does not move” or “the heat of phase transformation is neglected” are very critical; the impact of these assumptions on the results should be discussed.
7) Only an optical microscope was used, lacking high-resolution detail. Analyses such as pore structure, interfaces, and reinforcement distribution are insufficient. SEM analysis is recommended.
8) All variables used in the LED formula (especially "d" and "h") must be explained.
9) In some graphs, such as Figures 3, 4, and 7, the text is too small to read. Figure captions are inadequate.
10) In the microstructure images in Figure 12, the interpretation (different types of pores, microcracks, etc.) remains superficial.
11) The findings obtained are not sufficiently linked to the literature in which they are similar or contradictory. Typically, in such studies, it is expected that missing issues and aspects that could be improved will be included, albeit briefly.
12) Check the references. Especially reference 12
13) Check the language.
Comments on the Quality of English LanguageCheck the language.
Author Response
Please see the attachment.
Dear Editor and Reviewers:
On behalf of my co-authors, we are very grateful to you for giving us an opportunity to revise our manuscript. we appreciate you very much for your positive and constructive comments and suggestions on our manuscript entitled " Study on SLM Forming Parameters of Al₂O₃/CoCr Metal Matrix Composites " (ID: coatings-3800603).
We have studied reviewers' comments carefully and tried our best to revise our manuscript according to the comments. The following are the responses and revisions I have made in response to the reviewer' questions and suggestions on an item-by-item basis. Thanks again to the hard work of the editor and reviewer!
Author Response File: Author Response.pdf
Reviewer 3 Report
Comments and Suggestions for AuthorsThe paper is a finite element method approach to predict the forming approach of the selected Al2O3/CoCr MMC. The methodology was clearly explained and the reasoning was effective.
However, the paper is mainly a report of the results of the methodology employed by the authors, which does not lack merit but is not effectively compared with similar approaches. This approach makes it difficult to discuss the real results of the authors simply present what they achieved.
Nevertheless, the choice of spot diameter must be justified, it is not realistic and not in line with the presented SLM system (or other fiber laser). (Table 1)
Scanning spacing is also not justified and relatively low, but within range. (Table1)
The chosen parameters must also be justified and a VED should be presented (line 163 to 169).
Since a pulsed-laser was used (Renishaw, line 204-205), the VED equation suffers some alterations easily found in literature.
The found results are easily compared with literature regarding the response of similar MMC, please add some discussion.
Comments on the Quality of English Language
The paper has recurrent problems with not separating the units from the values, must translate figure 1, lacks a figure (figure 5), has inconsistent terminology (e.g. sometimes molten pool, others weld pool), which must be corrected. The most consensual term is not LED but VED (volumetric energy density).
Author Response
Please see the attachment.
Dear Editor and Reviewers:
On behalf of my co-authors, we are very grateful to you for giving us an opportunity to revise our manuscript. we appreciate you very much for your positive and constructive comments and suggestions on our manuscript entitled " Study on SLM Forming Parameters of Al₂O₃/CoCr Metal Matrix Composites " (ID: coatings-3800603).
We have studied reviewers' comments carefully and tried our best to revise our manuscript according to the comments. The following are the responses and revisions I have made in response to the reviewer' questions and suggestions on an item-by-item basis. Thanks again to the hard work of the editor and reviewer!
Author Response File: Author Response.pdf
Round 2
Reviewer 2 Report
Comments and Suggestions for AuthorsThe article can be accepted in its current form. The requested basic edits have been made.
Regards
