Crack Formation Mechanisms and Control Methods of Laser Cladding Coatings: A Review

Round 1

Reviewer 1 Report

Comments on the paper are given as follows:

1.     The novelty and review of the study should be described in the last paragraph with in-depth explanations related to its difference from previous research works.

2.     It is suggested to amend a section as the numerical analysis to discuss more on the reported results.

3.     The detailed residual stresses should be fully discussed.

4.     Please describe numerical simulations to predict crack.

 

5.     Nice style of writing.

Comments for author File: Comments.pdf

Minor editing of English language required

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 2 Report

The paper “Crack Formation Mechanisms and Control Methods of Laser Cladding Coatings: A Review” presents the cracks formation, evolution, and strategies to mitigate them for laser cladding coatings.

 

Some comments to improve the work quality:

In the introduction section, the authors should add an image of the laser cladding process scheme, helping the readers to understand what the paper is talking about.

Line 104: The authors should insert a scale bar in Figure 1e.

Line 107: The authors should insert a space between “150” and “mm/min”.

Line 109: The authors should insert a space between “720” and “mm/min”.

line 251: Before explaining the effects of hard particles in the coating characteristics, the authors should insert a phrase explaining that one of the most developed applications for laser cladding is improve the material surface wear-resistance depositing hard coatings.

Line 268: Figure 3 title: Add the alloys to which WC, TiC, and Cr elements were added, e.g., different content of WC“ in NiCrSiBC-WC composite.

Line 428: Insert “(E)” just after “concept of laser energy density”.

Line 434: Table 2: The authors should insert a space between “20-25” and “mm/s”, “0.11” and “N/mm”, “80” and “r/min”, “5” and “g/min”, “2000-3000” and “W”.

Line 504: The authors should retype the author name, changing “G et al.” to “Bidron et al.”.

 

Line 513: The authors should keep “1” and “h” in the same line.

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 3 Report

The authors provided a review on the cracking mechanisms for laser cladding process. While the manuscript is generally well executed, there are several issues that should be addressed before further consideration for publication.

1. While the review focuses on laser cladding, selective laser melting is also included in the discussion. In comparison, directed energy deposition is more similar than SLM for laser cladding, why is this not discussed? Should SLM even be included in the discussion?

- Xue et al. (2023), Effect of heat treatment on microstructure and mechanical properties of in-situ synthesized Ni2CrCoNb0. 16 multi-principal element alloy manufactured by directed energy deposition, Materials Science and Engineering A 862, 144398

- Ang et al. (2022), Process study for directed energy deposition of 316L stainless steel with TiB2 metal matrix composites, Materials Science in Additive Manufacturing 1 (2), 13

- Groden et al. (2022), Inconel 718-CoCrMo bimetallic structures through directed energy deposition-based additive manufacturing, Materials Science in Additive Manufacturing 1 (3), 18

- Xue et al. (2022), Microstructure evolution and enhanced mechanical properties of additively manufactured CrCoNi medium-entropy alloy composites, Journal of Alloys and Compounds 928, 167169 

 

2. For simulations, are they able to predict the crack propagation? 

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 4 Report

Writing a review is a rather laborious process for the authors, but it helps to get a critical review of the topic.
I have one remark.
When preparing the material for the review, did the authors of the articles on scaling find any? It is convenient to study the factors influencing the state of the surface (cracks, micro stresses) on a small scale. And improving the surface strength of materials is also convenient to carry out on a small scale. But if we talk about practical application, then we should move on to scaling. Will all methods be applied to reduce cracks, micro stresses and increase surface strength?

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Round 2

Reviewer 3 Report

NIL