Thermo-Fluid-Dynamic Modeling of the Melt Pool during Selective Laser Melting for AZ91D Magnesium Alloy
Round 1
Reviewer 1 Report
Please refer to attached review comments
Comments for author File: 
Comments.pdf
Author Response
Please see the attachment. Thanks a lot.
Author Response File: Author Response.pdf
Reviewer 2 Report
Dear authors,
the presented study of modelling and experimental validation of the melt pool of an AZ91 D alloy is designed well and also conducted in a thorough way.
The introduction gives a good overview of manufacturing Mg alloys, the application of AM and also the problems related to AM.
The language of the introduction is better than in the other sections of the manuscript, that has to be re-edited.
The modeling (the physical background) and the parameter selection seem reasonable to me and are described well. The experiment design and the results are plausible.
in section 2.3 there is an i as superscript ( ... effecths when this gradient is due to temperature difference. i) but I cannot find any text associated with that.
Fig. 5: please indicate the laser position
Concerninr rapid solidification and frequent re-heating: precipitation of primary and secondary phases should also be considered or at least mentioned.
Fig 10: although the colors are described in the text, I would recommed to indicate the areas in the scale bar
Section 3.3: please use evaporation instead of gasification
Fig. 13: Please add the directions of incident laser, direction of movement, layers, etc to the figure
In general the influences on the melt pool are described well as well as the possible consequences of parameter changes on the final material.
I strongly recommend professional english editing or proof-reading by a native speaker as there are many sentences with missing prepositions, incorrect word order and inappropriate tenses.
However, the changes I recommend are of minor type and should not hinder publication of the manuscript
Author Response
Please see the attachment. Thanks a lot.
Author Response File: Author Response.pdf
Reviewer 3 Report
Dear Editor: I would like to express my deep thanks for inviting me to review the manuscript ID: materials-899402
Title: Thermo-fluid-dynamic Modeling of the Melt Pool during Selective Laser Melting for AZ91D
Authors: Hongyao Shen, Jinwen Yan, Xiaomiao Niu
Comments:
Title:
Thermo-fluid-dynamic Modeling of the Melt Pool during Selective Laser Melting for AZ91D
Replaced by
Thermo-fluid-dynamic Modeling of the Melt Pool during Selective Laser Melting for AZ91D magnesium alloy
Abstract:
Please rewrite the abstract according to your results.
Please mention AZ91D composition
Introduction part:
Please write the aim and novelty in this work at the end of introduction section.
“steel (2/9th of density at room temperature). [1]”
replaced by throughout the manuscript
“steel (2/9th of density at room temperature) [1].”
Results and discussion:
- Why you choose only 100w and 200w instead of others.
- In figure 11 please add P=200W data.
- Figure 12 and 13 is not clear. Please provide clear images.
- According to Figure 14 experimental results differ significantly as compare to the simulation results please clarify this point.
- Please give a detail discussion of all Figures.
Conclusion part:
Please rewrite the conclusion according to experimental and simulation results.
RECOMMENDATION
After reviewing the enclosed manuscript for “Materials”, the present manuscript contains some kinds of scientific analysis but it is mandatory required to modify according to the preceding remarks. So, the manuscript can be accepted for publication after major mandatory revisions have been made.
Author Response
Please see the attachment. Thanks a lot.
Author Response File: Author Response.pdf
Round 2
Reviewer 1 Report
I have quickly browsed through the revised manuscript and continue to stronglyfeel that the content of the manuscript is based on several discrepancies and
scientifically flawed principles hence I recommend that the article should not
be considered for publications.
Reviewer 3 Report
Author addressed all of my comments in revised manuscript.
