The Mechanism of High-Strength Quenching-Partitioning-Tempering Martensitic Steel at Elevated Temperatures
Round 1
Reviewer 1 Report
Dear Editor,
thank you for giving me the opportunity to review the present paper.
The paper is quite interesting, anyway before being published i recommend the following:
1. My first concern is about the effect of elements on Q&P process.I think that references [11-15] are too general and I suggest to modify the text (line 45) as follows:
"The effects of micro-alloying elements, quenching and partitioning temperatures and holding time, and the martensite/austenite interface migration on the microstructure and mechanical properties have been extensively studied [11-15]. In particular it has been shown that silicon, aluminum and manganese, can be utilized for stabilization of retained austenite at room temperature [16-18]
[16] B. Masek, H. Jirkova, D. Hauserova, L. Kucerova and D. Klauberova, Materials Science Forum654-656 (2010) 94-97
[17] W. Cao, C. Wang, J. Shi and H. Dong, Materials Science Forum 654-656 (2010) 29-32.
[18] A. Di Schino, C. Braccesi, F. Cianetti, P. Di Nunzio, S Mengaroni, P. Rodriguez-Calvillo, J.M. Cabrera
Materials Science Forum 879 (2017) 430-435."
2. Moderate english language changes through all the text
Author Response
Reply to reviewer
Author Response File: Author Response.pdf
Reviewer 2 Report
This paper shows that the tensile behavior at elevated temperature of medium carbon Q-P-T steel. The authors explained well relationship between tensile properties and microstructural changes in the temperature range of RT and 350 C. However, they just mentioned DARA effect without any evidence on it. They need to supply experimental data on DARA. In addition, they need to supplement the reason why Q-P-T steels is necessary to contain tensile properties at high temperature in Introduction. The caption in Fig. 8 is insufficient, and English polishing is necessary as well.
Investigate the stability of retained austenites at RT and 200 Celsius, if possible.
In my thought, the stability of retained austenites at RT and 200 Celsius is one of the critical factors to determine drastic improvement in tensile property at 200 Celsius.
Author Response
Reply to reviewer
Author Response File: Author Response.pdf
Round 2
Reviewer 2 Report
The authors revised the manuscript faithfully. This revised paper is ready for publication.