Study on Dynamic Mechanical Behaviors and J–C Constitutive Model of a Fine-Grained D6A Steel
, Xicheng Huang 1 and Ruoze Xie 1
Round 1
Reviewer 1 Report
This paper investigates the uniaxial tensile loading tests of coarse grained D6A steel and ultrafine grained D6A steel by using material testing machine and rotating Hopkinson tension bar (SHTB). The experiment results are very good. Minor issues need to revise in the paper.
Experiment part
- The author use the finite element to simulate the results. The author should write down the simulation software. (For example, ANSYS software). For simulation results, the author should write down the elastic modulus for this material and the boundary conditions for this simulation part. These part suggest to add in the experiment part of paper.
- The experiment procedure writes after hot rolling and two-phase annealing. The author should write down the temperature and reduction (%) of hot rolling. Also, the author should write the temperature and times for annealing.
Results
- The Figures 10 and 11 are a little blurry.
- In conclusion, the author writes Grain refinement and cementite precipitation are the main reasons for the 341 strength improvement of UFG D6A steel. Is grain size also relate to tensile strength? Can small grain size or large grain size improve the strength of the steels?
Comments for author File: 
Comments.pdf
Author Response
Thank you very much for your review, we hope that the correction will meet with approval. Please see the attachment.
Author Response File: 
Author Response.docx
Reviewer 2 Report
The article is very interesting but the following questions need to be answered.
Regarding the fitting, it is necessary to indicate how it has been carried out and the fitting error obtained.
With regard to the simulation using the finite element method, it is necessary to indicate whether the simulation is 3D or using an axisymmetric model. It is necessary to indicate which software has been used and the type of analysis carried out, indicating the boundary conditions of the simulation.
It is necessary to improve the quality of the figures, especially figure 11b.
Author Response
Thank you very much for your review, we hope that the correction will meet with approval. Please see the attachment.
Author Response File: Author Response.docx
