|
|
|
| Dislocation Pipe Diffusion of Mn during Annealing of 5Mn Steel |
| Jie LIN1,Xi-nan LUO1,Xiao-yan ZHONG1,Hui-hua ZHOU1,Cun-yu WANG2,Jie SHI2,Han DONG2 |
1. National Center for Electron Microscopy in Beijing, Key Laboratory of Advanced Materials MOE, State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University,Beijing 100084, China
2. Central Iron and Steel Research Institute, Beijing 100081, China |
|
|
|
|
Abstract The dislocation pipe diffusion of Mn during annealing of 5Mn steel was experimentally investigated using transmission electron microscopy (TEM). Many dislocations existed inside the ferrite and terminated at the ��/�� interface of the sample after intercritical annealing at 650 �� for 1 min. Line scans of Mn distribution demonstrated a high Mn concentration in austenite and Mn enrichment at dislocations, indicating that the dislocation pipe diffusion of Mn during intercritical annealing occurred in addition to the ��/�� interface diffusion. In-situ TEM observations at 500 �� revealed that due to Ostwald ripening, large cementite precipitates grew while small cementite precipitates dissolved via Mn diffusion along the dislocations between them.
|
|
Received: 15 April 2016
Published: 15 December 2016
|
| Fund:National Basic Research Program of China;National Natural Science Foundation of China;Specialized Research Fund for the Doctoral Program of Higher Education of China |
|
Corresponding Authors:
Xiao-yan
E-mail: xyzhong@mail.tsinghua.edu.cn
|
|
|
|
| [1] |
Min-qiang Gao,Ying-dong Qu,Guang-long Li,Jun-hua You,Rong-de Li. Cementites decomposition of a pearlitic ductile cast iron during graphitization annealing heat treatment[J]. Chinese Journal of Iron and Steel, 2017, 24(8): 838-843. |
| [2] |
Hong-ru Ren,Jin-tao Gao,Zhe Wang,Chong Li,Fu-qiang Wang,Zhan-cheng Guo. Evolution of microstructure, mechanical and magnetic properties of electrodeposited 50%Ni-Fe alloy foil after thermal treatment[J]. Chinese Journal of Iron and Steel, 2017, 24(8): 844-851. |
| [3] |
Tao Zhang,,Cheng-yong Wang,*,Lugee Li,**,Yong Zhang,Cui-lan Liu. Mass production of magnetocaloric LaFeMnSiB alloys with hydrogenation[J]. Chinese Journal of Iron and Steel, 2017, 24(4): 462-468. |
| [4] |
Dong-dong Zhuang,*,Lei-gang Wang,Yao Huang,Xiao-min Li,Hua-yang Zhang,De-wei Ren. Microstructure and texture evolution during recrystallization of low-carbon steel sheets[J]. Chinese Journal of Iron and Steel, 2017, 24(1): 84-90. |
| [5] |
Juan JIA,Wei-wei ZHU,Xin-li SONG,Ze-xi YUAN. Precipitation Behavior of FeTiP in Ti-added Interstitial Free High Strength Steels[J]. Chinese Journal of Iron and Steel, 2016, 23(7): 692-698. |
| [6] |
Ye XIA,Xi-nan LUO,Xiao-yan ZHONG,Hui-hua ZHOU,Cun-yu WANG,Jie SHI. In-situ TEM Observation of Cementite Coarsening Behavior of 5Mn Steel during Tempering[J]. Chinese Journal of Iron and Steel, 2016, 23(5): 442-446. |
|
|
|
|
2016, Vol. 23 
