CHARACTER OF CARBON-DEPLETED REGIONS IN UNDERCOOLED AUSTENITE AND THERMODYANMICS OF BAINITIC TRANSFORMATION

Abstract

Abstract: The chemical driving forces for the phase transformation from austenite in three different car- bon-depleted regions into ferrite with the identical composition have been derived respectively. The starting temperature of bainitic transformation,B_s,has also been calculated according to the shearing mechanism of bainitic transformation in carbon-depleted regions of austenite. The maximum driving forces for banitic transformation at B_s in both 3% Cr and the CrMo steels were obtained.It was shown that the proposed shearing mechanism of the bainitic trans- formation is thermodynamically possible.

Key words: bainitic, transformation, thermodynamics

YANG Quanmin KANG Mokuang Northwestern Polytechnical University,Xi'an,China YANG Quanmin,Dept.of Material Science and Engineering,Zhejiang University,Hangzhou 310027,China. CHARACTER OF CARBON-DEPLETED REGIONS IN UNDERCOOLED AUSTENITE AND THERMODYANMICS OF BAINITIC TRANSFORMATION[J]. Acta Metallurgica Sinica (English Letters), 1991, 4(1): 1-7.

[1]	Xiaosheng Zhou, Hao Chen, Chenxi Liu, Yongchang Liu. Residual Ferrite Control of 9Cr ODS Steels by Tailoring Reverse Austenite Transformation [J]. Acta Metallurgica Sinica (English Letters), 2021, 34(2): 187-195.
[2]	Meichen Liang, Hao Zhang, Lifeng Zhang, Peng Xue, Dingrui Ni, Weizhen Wang, Zongyi Ma, Hengqiang Ye, Zhiqing Yang. Evolution of Quasicrystals and Long-Period Stacking Ordered Structures During Severe Plastic Deformation and Mixing of Dissimilar Mg Alloys Upon Friction Stir Welding [J]. Acta Metallurgica Sinica (English Letters), 2021, 34(1): 12-24.
[3]	Ibrahim Ondicho, Bernard Alunda, Dicken Owino, Luke Otieno, Melody Chepkoech. Revealing a Transformation-Induced Plasticity (TRIP) Phenomenon in a Medium-Entropy Alloy [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(8): 1159-1165.
[4]	Jia-Qi Zhao, Hua Tian, Zhong Wang, Xue-Jiao Wang, Jun-Wei Qiao. FCC-to-HCP Phase Transformation in CoCrNi_x Medium-Entropy Alloys [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(8): 1151-1158.
[5]	Chengbo Yang, Jing Zhang, Meng Li, Xuejian Liu. Soft-Magnetic High-Entropy AlCoFeMnNi Alloys with Dual-Phase Microstructures Induced by Annealing [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(8): 1124-1134.
[6]	P. F. Zhou, D. H. Xiao, T. C. Yuan. Microstructure, Mechanical and Corrosion Properties of AlCoCrFeNi High-Entropy Alloy Prepared by Spark Plasma Sintering [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(7): 937-946.
[7]	Lei-Lei Xing, Cong-Cong Zhao, Hao Chen, Zhi-Jian Shen, Wei Liu. Microstructure of a Ti-50 wt% Ta alloy produced via laser powder bed fusion [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(7): 981-990.
[8]	Hong-Bin Li, Ming-Song Chen, Ya-Qiang Tian, Lian-Sheng Chen, Li-Qing Chen. Ultra-fine-Grained Ferrite Prepared from Dynamic Reversal Austenite During Warm Deformation [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(2): 290-298.
[9]	Pengfei Gao, Weijian Chen, Feng Li, Beijia Ning, Zhengzhi Zhao. Quasi-Situ Characterization of Deformation in Low-Carbon Steel with Equiaxed and Lamellar Microstructure Treated by the Quenching and Partitioning Process [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(12): 1657-1665.
[10]	Hongduo Wang, Kuaishe Wang, Wen Wang, Yongxin Lu, Pai Peng, Peng Han, Ke Qiao, Zhihao Liu, Lei Wang. Microstructure and Mechanical Properties of Low-Carbon Q235 Steel Welded Using Friction Stir Welding [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(11): 1556-1570.
[11]	Zhen-Yang Li, Sheng-Li Li, Ze-Ming Yuan, Yang-Huan Zhang. Effects of Ni Content and Ball Milling Time on the Hydrogen Storage Thermodynamics and Kinetics Performances of La-Mg-Ni Ternary Alloys [J]. Acta Metallurgica Sinica (English Letters), 2019, 32(8): 961-971.
[12]	Pei-Lin Zhang, Yu-Hong Zhao, Ruo-Peng Lu, Zhi-Bing Ding, Hua Hou. Microalloying Effect of Sn on Phase Transformation During Heat Treatment in Mg-Y-Zn-Zr Alloys [J]. Acta Metallurgica Sinica (English Letters), 2019, 32(5): 550-558.
[13]	Da-Zheng Zhang, Xiu-Hua Gao, Lin-Xiu Du, Hong-Xuan Wang, Zhen-Guang Liu, Ning-Ning Yang, R. D. K. Misra. Corrosion Behavior of High-Strength Steel for Flexible Riser Exposed to CO₂-Saturated Saline Solution and CO₂-Saturated Vapor Environments [J]. Acta Metallurgica Sinica (English Letters), 2019, 32(5): 607-617.
[14]	Huan Liu, He Huang, Jia-Peng Sun, Ce Wang, Jing Bai, Ai-Bin Ma, Xian-Hua Chen. Microstructure and Mechanical Properties of Mg-RE-TM Cast Alloys Containing Long Period Stacking Ordered Phases: A Review [J]. Acta Metallurgica Sinica (English Letters), 2019, 32(3): 269-285.
[15]	Sohail Ahmad, Li-Feng Lv, Li-Ming Fu, Huan-Rong Wang, Wei Wang, Ai-Dang Shan. Effect of Annealing on Microstructure and Mechanical Properties of Ultrafine-Grained Low-Carbon Medium-Manganese Steel Produced by Heavy Warm Rolling [J]. Acta Metallurgica Sinica (English Letters), 2019, 32(3): 361-371.

CHARACTER OF CARBON-DEPLETED REGIONS IN UNDERCOOLED AUSTENITE AND THERMODYANMICS OF BAINITIC TRANSFORMATION

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments