High-Strain Rate Spall Strength Measurement for CoCrFeMnNi High-Entropy Alloy
Round 1
Reviewer 1 Report
Cantor high entropy alloy (HEA) of CoCrFeMnNi were systematically experimental studied. The Hugoniot equations of state (EOS) of the materials was determined and the EOS coefficient was measured. The spallation strength of the alloy at a high pressure up to 5 GPa and strain rates in excess of 106 s-1.The failure mechanism behind spallation is analyzed. It is revealed that the ductile fracture occurs in the void caused by the chromium oxide deposit produced in the manufacturing process. It is a very interesting paper. The research appropriately designed, the methods and results were adequately described and clearly presented.The manuscript was well written and can be accepted for publication as it is.
Author Response
Thank you for your review. We appreciate your time in this matter.
Reviewer 2 Report
Line 31-33: more references are necessary.
Line 39: What kind of other high consequence applications Authors mean?
Line 44: EOS not EoS
Line 64: Please, add reference for the article where this previous research is published.
Line 74: In the aim of the work Authors should write that presented results are do first time for such type of the alloys. If not, Authors should explain what is novel in their measurements and results.
Line 86: If it possible, can Authors add picture of investigated alloy?
Line 131: two times “and”
Figure 3a and 3b: the velocity scale should have the same length.
Figure 4: equations on figure: what mean “y” and “x”?
What value of coefficient of determination Authors obtain for Us – Up relation?
How Authors explain scatter of results obtained from MD simulations.
Obtained Hugoniot coefficient s and bulk sound speed c0 should be compared with some literature data, for example with these obtained for bulk alloys.
Author Response
Thank you for your feedback. We have attached a point-by-point response.
Author Response File: 
Author Response.pdf
Reviewer 3 Report
Congratulations to the authors of the work, the article is written clearly and clearly, concerns an interesting topic (fits in the popular subject of HAE), and presents interesting properties of the CoCrFeMnNi material. I did not find any shortcomings or errors in the text and I believe that the material, results, and analysis are carried out and described correctly. I was interested in the porosity, which can be observed in Figure 8b, what is the general share of pores, what is their shape, and where are the privileged places for their formation - this is interesting from the point of view of the analyzed properties. Please also pay attention to the correct description of the devices, as the journal recommends.
kind regards
reviewer
Author Response
Thank you for your review. The correct description of the devices according to journal recommendations has been verified. We appreciate your time in this matter.
