Research on Hot Deformation Behavior of F92 Steel Based on Stress Correction
Abstract
:1. Introduction
2. Experimental Details
3. Results and Discussion
3.1. True Stress–Strain Curve
3.2. Stress Correction Model 1
3.3. Stress Correction Model 2
3.4. Arrhenius (AR) Model at Strain of 0.3
3.5. Microstructure Evolution
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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C | Si | Mn | P | S | V | Ni | Cr | Mo | Al | Cu | W | B |
---|---|---|---|---|---|---|---|---|---|---|---|---|
0.12 | 0.3 | 0.44 | 0.01 | 0.002 | 0.23 | 0.14 | 8.65 | 0.46 | 0.007 | 0.082 | 1.78 | 0.003 |
Symbol | Definition | Unit |
---|---|---|
Ro | radius before strain rate | mm |
ho | height before strain rate | |
h | height after strain rate | |
RM | radius after strain rate |
Strain Rate(s−1) | Deformation Temperature (°C) | ||||
---|---|---|---|---|---|
250 | 300 | 350 | 400 | 450 | |
0.001 | 1.12 | 1.17 | 1.13 | 1.11 | 1.13 |
0.01 | 1.14 | 1.21 | 1.18 | 1.15 | 1.11 |
0.1 | 1.11 | 1.18 | 1.14 | 1.12 | 1.15 |
1 | 1.16 | 1.16 | 1.11 | 1.17 | 1.12 |
10 | 1.12 | 1.12 | 1.19 | 1.18 | 1.11 |
Symbol | Definition | Unit | Numerical Value |
---|---|---|---|
Cp | specific heat capacity | J/(g*K) | 0.5 |
∫σdε | mechanical power | ||
∆ε | strain interval | 0.3/0.5/0.7 | |
average stress | MPa | ||
ρ | density of experimental materials | g/cm3 | 7.75 |
∆T | temperature rise | ||
γ | adiabatic factor | 0 (0.001 s−1), 0.25 (0.01 s−1), 0.5 (0.1 s−1), 0.75 (1 s−1), 1(10 s−1) |
Symbol | Definition | Unit | Numerical Value |
---|---|---|---|
σa | Adiabatic-corrected stress | Mpa | |
σo | origin stress | Mpa | |
Q’ | constant coefficient | J/mol | 23 |
R | universal gas constant | J/(mol × K) | 8.5 |
TD | deformation temperature | K | |
TR | Thermocouple temperature | K | |
f | friction coefficient | 0.25 | |
ro | original radius | mm | 4 |
ho | original height | mm | 12 |
e | true deformation |
Symbol | Definition | Unit |
---|---|---|
ε | strain rate | s−1 |
σ | flow stress | MPa |
Q | deformation activation energy | J/mol |
T | absolute temperature | K |
R | molar gas constant | 8.31 J/(mol*K) |
A | structural factor | material constant |
α | stress level parameters | |
n | stress index |
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Li, J.; Yu, R.; Xu, G.; Chen, C.; Ha, Y.; Song, L.; Zhang, H. Research on Hot Deformation Behavior of F92 Steel Based on Stress Correction. Metals 2022, 12, 698. https://doi.org/10.3390/met12050698
Li J, Yu R, Xu G, Chen C, Ha Y, Song L, Zhang H. Research on Hot Deformation Behavior of F92 Steel Based on Stress Correction. Metals. 2022; 12(5):698. https://doi.org/10.3390/met12050698
Chicago/Turabian StyleLi, Jinghui, Renhai Yu, Gaoshan Xu, Changhua Chen, Yao Ha, Leijun Song, and Huiping Zhang. 2022. "Research on Hot Deformation Behavior of F92 Steel Based on Stress Correction" Metals 12, no. 5: 698. https://doi.org/10.3390/met12050698