Strength–Ductility Matching Mechanism for Multi-Phase Microstructure Control of High-Ductility Ship Plate Steel
Round 1
Reviewer 1 Report
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Comments for author File: 
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Author Response
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Reviewer 2 Report
The control of the mechanical properties of steels of complex chemical composition is a rather topical topic for research. The authors did a great job of working out the parameters, analyzing the results and discussing. The results obtained are not in doubt, and the discussion is of a high level. As a remark, I would like to point out Table 1. What method was used to measure the chemical composition of the alloy? What is the confidence interval of the measured values for each element?
Author Response
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Author Response File: Author Response.pdf
Reviewer 3 Report
This paper focuses on the microstructure control for a ship plate steel by adjusting the cooling processes with the aim of analysis of strength-ductility matching mechanism with different microstructures. The authors profoundly characterized the developed microstructures and defined the microstructure with the best strength-ductility balance.
This paper is a well-designed, well-written and organized paper. The experimental work is clear and straightforward. The authors did a good job with presenting their results. I found the charachterization method, particularly of the microstructures, and the accompanying discussions both interesting and instructive.
The authors can be benefited from the following comments:
1- "relaxation-laminar cooling-air cooling" not clear, is it “relaxation-laminar air-cooling”
2- Table 1: as the Ti, Nb and V play different roles in the precipitation formation and the microstructure development (different dissolution temperatures and precipitation kinetics) it is important to provide the content of each element separately. Please provide the microalloying contents of the three elements Nb, Ti and V.
3- “the temperature of Ar1 and Ar3 were measured to be 830.9 °C and 688.0 °C, respectively.
4- If the calculated temperatures are the temperatures under equilibrium, Ae1 and Ae3 should be used instead of Ar1 and Ar3 (Ar1 and Ar3 are attained during continuous cooling).
5- The equation of Tnr shows the importance of giving the content of each microalloying element in Table 1.
6- Please change “precision rolling” to “finish rolling”
7- “where K is a contanst” change to “K is a constant”
8- “FWHM of the diffraction peak”- Pls. explain for what FWHM it stands
9- “This method shows high accuracy and confidence” Please give a reference or a reason for this claim.
10- The authors jumped from discussing Figure 8 (line 244 to line 259) to Figure 9 (line 263 to line 280) and got back to describing the results in Figure 8. The reason for this jump is not clear.
11- It is true in Figure 8b to define that the point on intersection between the work hardening rate and true strain curves as the end of uniform elongation, however a reference is needed.
12- Please change “small angle grain boundary (LAGB)” to “low angle ..”
Author Response
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Author Response File: Author Response.pdf
