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Materials
Volume 16
Issue 8
10.3390/ma16083193
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Article
Peer-Review Record

Mechanical Behavior of a Medium-Entropy Fe65(CoNi)25Cr9.5C0.5 Alloy Produced by Selective Laser Melting

Materials 2023, 16(8), 3193; https://doi.org/10.3390/ma16083193
by Elizaveta Povolyaeva 1, Dmitry Shaysultanov 1, Ilya Astakhov 1, Stanislav Evlashin 2,3, Margarita Klimova 1, Nikita Stepanov 1,3 and Sergey Zherebtsov 1,3,*
Reviewer 2:
Pei Wei
Materials 2023, 16(8), 3193; https://doi.org/10.3390/ma16083193
Submission received: 10 March 2023 / Revised: 10 April 2023 / Accepted: 15 April 2023 / Published: 18 April 2023
(This article belongs to the Special Issue Additive Manufacturing and Welding Technologies for High-Entropy Alloys and Dissimilar Metals)

Round 1

Reviewer 1 Report

The authors investigated the mechanical behaviour of Fe65(CoNi)25Cr9.5C0.5 MEA produced by the SLM process when subjected to tension at room and cryogenic temperatures. This is good work considering the fact that limited studies have been carried out in this area. However, the manuscript can be further improved by addressing the followings:

-          Please, ensure that all abbreviations well defined starting from the abstract down to the conclusion section

-          Kindly specify the flow rate of the argon gas utilized as shielding gas

-          Full dimensions of the tensile sample should be provided in Fig.2

-          The role of building parameters (power and beam scan speed) on porosity still needs to be clearly elucidated. The porosity results have been presented but the scientific reasons behind this occurrence are missing

-          The captions of Figs.6, 7, 8, 9, 10, 11 need to show/reveal the process parameters employed for the fabrication of the samples

Author Response

Please see the attachment

Author Response File: Author Response.pdf

Reviewer 2 Report

Paper 'Mechanical behavior of a medium entropy Fe65(CoNi)25Cr9.5C0.5 alloy produced by selective laser melting' is aiming to study the porosity and microstructure of L-PBFed Fe65(CoNi)25Cr9.5C0.5 alloy and their influence on mechanical behavior. The porosity and microstructure were investigated by OM, SEM and TEM as well as EBSD. Although the writing was good, some questions should be added:

1.     In Fig.7 and Fig.8, the authors should give the element distribution and verify the element composition of FCC and BCC phase.

2.     From TEM and EBSD images in Fig.8 and Fig.10, the sub-microstructure was clearly found. The authors should explain the formation mechanism of sub-microstructure, and its relationship with grain growth.

3.     In Fig.13, the strength of Fe65(CoNi)25Cr9.5C0.5 alloy as a function of the martensite fraction. Whether the martensite fraction can be adjusted by changing the processing parameters?

Comments for author File: Comments.pdf

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

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