Laser Cavitation Peening: A Review

Round 1

Reviewer 1 Report

The manuscript entitled “applsci-2390212” dealing with laser has been reviewed. The paper has been nicely written but needs significant improvement. Please follow my comments.

1.     More information about the filtering of the images presented in Figure 4 is needed.

2.     What is the main issue that will be solved by this investigation? Please clarify it in the text.

3.     Is there any differences between this work and other works in the literature?

4.     Please add a brief statement on your methodology.

5.     What is the future direction of this work?

6.     Please proofread the paper.

7.     Add more detail about the reported values to the conclusion. This increases the bonding of this section to the previous sections and improves the quality of your paper.

8.     Laser has many advantages over the conventional manufacturing method which can be highlighted in your paper. Please read the following manuscript and add it to the literature to show how the laser is comparable with conventional manufacturing. “Laser subtractive and laser powder bed fusion of metals: review of process and production features”

English needs some edits.

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

DEAR AUTHORS

The manuscript is  very interesting and it gives valuable information about laser cavitation peening, still, there are notes to be considered:

1- For Figure 4, what are the dimensions or the scale of Figs a and b? This note includes Fig 6-a, fig 8 a, and b and other similar figures in the manuscript.

2- In section 3.1 page 8 line 8, you mention that the beam diameter of the laser beam is about few millimeters, is this diameter before or after focusing?

3- Equation 1 page 9 needs the reference of it.

4- The quality of Figure 10 should be improved.

5-  In section 3.2 lines 11 and 12, you mention the other two bubbles were generated and then collapsed, which two bubbles you meant?

6- In the upper part of Figure 20 there is a letter (a), please define this letter if it represents the radius or another term.

7- On page 17 equations 5 and 6 need their reference. 

Author Response

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Author Response File: Author Response.pdf

Reviewer 3 Report

the manuscript represents a review on the surface treatment using laser ablation and laser cavitation peening. the authors are expert in this field and have done lots of work experimentally in this field. they have already published several reviews regarding to laser cavitation, peening effect and similar issues. what if they prepared a comprehensive review instead of publishing several reviews. the references in this review numbered 6, 19, 25 and 46 seem to be review articles in this field.

However, in line 457, it is mentioned:

one of the future research directions in respect of laser cavitation peening is the research and development of laser cavitation peening using a pulse laser with a longer pulse width to increase the repetition frequency. 

It should be noted that:

there is no direct relation between the pulse repetition rate and the pulse width. lengthening the pulse width would put a limit on the maximum repetition rate. Actually, the pulse width can not be longer the pulse-to-pulse separation time which is the reciprocal of the pulse repetition rate. That means, by increasing the pulse width, the maximum possible pulse repetition rate would decrease. 

Author Response

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Author Response File: Author Response.pdf

Reviewer 4 Report

I consider that it is accepted and only requires minor corrections
Comments to the authors:
1. Improve figure 1, although it is from another publication,
you have to find ways to improve it.
2. Improve figure 10, it looks fuzzy and poorly scanned
3. Several advantages are presented about the process on which you do the review,
but little mention is made about problems,
disadvantages, costs and complexity of the implementation

Author Response

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Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

Paper is ready to publish.