Reduction in Porosity in GMAW-P Welds of CP780 Galvanized Steel with ER70S-3 Electrode Using the Taguchi Methodology

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

The paper can be accepted, but it is necessary to make appropriate corrections in order to get it to the highest possible quality.

- The abstract is quite concise. Expand the abstract with the main theses and contributions of the paper itself and key information.

- the introductory part is also very short. Correct and expand the introduction by analyzing recent papers in this field.

- At the end of the introduction, write what is the main contribution of the paper and why should it be published. How does this paper differ from similar ones in this field?

- Chemical compounds and symbols should be written in accordance with the SI system and the journal instructions.

- Check throughout the paper whether it is about the weight or volume content of the elements.

- For the design of the experiment, the L9 matrix and Taguchi design were selected. Give a description of the Taguchi method and explain why the L9 matrix was chosen. View papers: https://doi.org/10.18485/aeletters.2023.8.4.2, https://doi.org/10.17559/TV-20150429090420

- Why were the interactions between the parameters not taken?

- How many times was the experiment repeated?

- In Figure 3, give the standard deviation of the obtained values.

- Equation 1 and the text below the picture do not agree. Terms that are not given in the equation appear. Give units for all displayed values.

- Unify-adjust the text in table 5 with equation 1.

- In anova analysis, show the mathematical linear dependence of the output on the input parameters.

- Do a confirmation test and calculate the error.

- Can taguchi analysis be successfully used to analyze the results? Give an explanation.

- Discuss all obtained results

- Analysis and discussion of the obtained results is missing. Compare the general results with the results of other researchers.

- Based on the extended analysis and discussion, expand the concluding considerations.

- Check the way of citing the literature. Check whether the citation is in accordance with the journal's instructions. Expand the list of literature.

Author Response

Hi,

we have prepared the attached response to Reviewer 1.

Thanks

Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

1. Two defect types, clustered porosity and spherical porosity, were observed in this study. Authors are suggested to discuss the formation mechanism and dominant formation parameter of these two types of pores. Which type of pores is more undesirable?

2. What does "lack of fusion" (in Table 4) mean? It is useful to mark the fusion area in Figure 2.

3. In this study, CP780 zinc-coated steel sheets with a thickness of 2 mm were used, and the filler material was an ER70S-3 solid electrode with a diameter of 1.2 mm. Do the steel sheet thickness, filler material, and electrode diameter affect the final results suggested by this study?

4. It is suggested to include the thickness of base material and the diameter of the filler electrode in the DOE of the Taguchi method. 

5. The range of peak times between 9.5 and 10.5 ms appears to be too narrow. Does it provide the reasonable result and does it show the real effect under such a narrow range?

6. Figure 3 is redundant. It just plots the numbers listed in Table 4.

7. The symbol (η) for the equipment efficiency shown in Eq. (1) is not correct. Also, what is the equipment efficiency used by this study. 

Author Response

Hi,

we have prepared the attached response to Reviewer 2.

Thanks

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

Comments and Suggestions for Authors

The authors accepted all suggestions. I suggest that the paper be published.

Reviewer 2 Report

Comments and Suggestions for Authors

The revised manuscript has properly replied the reviewer's comments and can be accepted for publication.