Young’s Modulus and Residual Stresses of Oxide-Free Wire Arc Sprayed Copper Coatings

Round 1

Reviewer 1 Report

Dear Authors,

 

Congratulations on your work, which is focused on a very interesting subject. As any other paper in this phase, there are some amendments to do, whose can improve the overall quality of your paper. Thus, I'm providing below some comments and suggestions, trying to collaborate by this way in improving your paper:

1. The Abstract doesn't clearly state the literature gap found, as well as the real novelty of this work. Thus, please clearly state the gap found in the literature in the Abstract, Introduction and Conclusions. The main goals are also not clear in the Abstract.

2. The novelty brought by your work is also not properly pointed out. Thus, please state clearly the novelty that your paper represents for the scientific community, stating as well if your contribution is exclusively scientific or if there was some practical motivation behind the development of your work. Any industrial application based on this work should also be pointed out.

3. The Literature Review is well done, but readers prefer direct speech, describing briefly in what the work of previous Researchers has been focusedon, methodology used and main results. Please avoid as much as possible generic ideas.

4. The refernces start in [13]. Maybe you want to state [1-3]. Please order the references in the right sequence.

5. In Table 1, some parameters are starting by upper case, other by lower case. Please make this homogeneous.

6. Also in Table 1, some units are missing (current, voltage).

7. Please characterize better the AFM equipment used, as well as the scanned area to analyze the surface roughness.

8. No quantitative results are shown in the Abstract and Conclusions. It would be better for the reader to easily find data about the coating characterization, seeking after that more information in the paper. Thus, please improve this.

9. In caption of Figure 2, please refer the observation methodology/technique used, to easily contextualize the reader.

10. When describing the variables contained in each formula, please point out the units using the International Units System.

11. The size of the SEM images is not homogeneous. If possible, please try to make them as homogeneous as possible.

12. The Discussion of the results is very well dode. Congratulations!!!

13. The results are also very interesting.

14. Please try to highlight the main conclusions using bullet points (topics), helping the reader to identify the main achievements brought by your work.

Good luck. Best wishes.

Kind regards.

FGS

Author Response

Please see the attachment.

Author Response File: Author Response.docx

Reviewer 2 Report

The manuscript was related Young’s modulus and residual stresses of oxide-free wire arc sprayed copper coatings. The manuscript is interesting and has enough novelty. However, some corrections are needed before publication:

 

1.      The abstract is very general and needs to be addressed in quantitative details of experiments and results.

2.      Introduction: in first paragraph ref [13]?

3.      Line 75: cf. What is the abbreviation?

4.      The materials and methods section is messed up and should be classified and presented in the test conditions section, samples and standards. (Material, Coating method, Young’s modulus, residual stresses, Characterization, etc.) Also detailed information about the substrate and coat such as chemical composition, surface roughness, dimensions should be provided.

5.      In the materials and methods section, it is mentioned that the experiment, which the results are not mentioned in the manuscript, such as nano-indentations, hole-drilling strain gage method the authors can use The effect of stress relieving treatment on mechanical properties and microstructure of different welding areas of A517 steel paper to complete the discussions

6.      The results require additional analyzes such as X-ray diffraction from the coating.

7.      Line 140: “light microscope images” replace with “Optical micrographs”

8.      Figure 2: discuses on the coating thickness, and interface the author can check this paper: Flexible Interface Design for Stress Regulation of a Silicon Anode toward Highly Stable Dual‐Ion Batteries, Synergic realization of electrical insulation and mechanical strength in liquid nitrogen for high-temperature superconducting tapes with ultra-thin acrylic resin coating

9.      Figure 5: SEM micrographs in Figures 5 and 10 show similar images with APS coating, which should be compared by the authors

10.  Complete the residuals stress discussion; the authors can have inspired from this paper: residual stress of MoS2 nano-lubricant grinding cemented carbide

11.  Use EDS analysis to characterize the phase formation during coating

 

Author Response

Please see attachment.

Author Response File: Author Response.docx

Reviewer 3 Report

I have some suggestions to improve the article.

First of all, there is a mistake in reference [13] (line 39). It must be [1-3]. In references part reference 1 must be corrected too.

It may be better if the absract would be focused on dependence of present article on other researches dedicated to wire arc sprayed coatings. Few words concerning Young’s modulus & residual stress volumes are necessary.

In table 1 volumes of current & voltage are necessary. The field named as “substrate material” meaning is unclear (it may be density?).

The Young’s modulus volumes difference (lines 229-231) may be explained by different particles size. So, it would be useful, if authors will be present the particles size volumes here. Also, it must be highlighted what size was determined by authors & what size was determined by another researches (in this case, it needs in corresponding reference). Also, the exact chemical compositions of compared coatings must be presented & discussed.

Author Response

Please see attachment.

Author Response File: Author Response.docx

Round 2

Reviewer 2 Report

 Accept in present form

Reviewer 3 Report

I think that the paper could be published in present form.