Research Status of Stability in Dynamic Process of Laser-Arc Hybrid Welding Based on Droplet Transfer Behavior: A Review

Round 1

Reviewer 1 Report

The review is devoted to the investigation of the droplet transfer behavior in the laser-arc hybrid welding (LAHW) technology. Droplet transfer is critical for optimizing the welding process, and this determines the relevance of the work. The results are of interest for the aerospace industry and mechanical engineering.

However the paper has some minor issues. Below are my comments:

 1.     Numerical simulation research is a calculation based on a mathematical model for a physical system. Therefore, the phrase “Zhang et al.[134] developed numerical simulation research on LAHW, and found with the increase of laser power, the depth width ratio of molten pool increases” is incorrect because there is no simulation in the cited article.

However, it would be appropriate to expand the review with references in which numerical simulation of droplet transfer process is carried out.

2. Make sure all required links are included. For example, the formula 0.5 is given without reference to the source.

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 2 Report

The paper reports an interesting and very useful review work covering laser-arc hybrid welding (LAHW) technology behavior. The manuscript is well structured and can be published after some revisions. The reviewer enjoyed reading this paper.

The manuscript has some weaknesses. Overall it should be expanded. Mentioned below aspects should be taken into consideration during the revision:

1.    Units and abbreviations:

I suggest adding "Nomenclature" (as list of symbols, list of abbreviations and subscripts and others) in the manuscript.

 

2.    Introduction:

Literature analysis should be expanded. Since this is a review paper, it is necessary to look more broadly and mention other aspects and properties (for example residual stress and fatigue life assessment). See for example the fallowing papers (not limited to):

- https://doi.org/10.1016/j.ijfatigue.2022.107137 - about the effect of the LTT filler on residual stress fields and fatigue lifetime;

- https://doi.org/10.1016/j.marstruc.2021.103120 - about underwater wet welding.

 

3.    Figures:

The figures are very well prepared. Regardless, if they are taken from somewhere, they should be quoted in the caption

  

4.    Conclusions:

4.1. The conclusions should be in a quantified form.

4.2. The practical usefulness of the results should be emphasized.

4.3. The main limitations of the present method must be identified and discussed in the end of this section.

 

Author Response

Please see the attachment.

Author Response File: Author Response.pdf