Study on the Formulation Mechanism of Blisters in Electrochemical Hydriding Experiment of Medium Carbon Steel through Macro-micro Simulation

Study on the Formulation Mechanism of Blisters in Electrochemical Hydriding Experiment of Medium Carbon Steel through Macro-micro Simulation

Yuan Li Fengshan Du Junkai Fan Shiguang Huang Binbin Hu

School of Mechanical Engineering, Yanshan University

School of Mechanical and Power Engineering, Henan Polytechnic University

Corresponding Author Email: 
cccruler234@hotmail.com; fsdu@ysu.edu.cn; 29656632@qq.com; 1571776058@qq.com; 904241905@qq.com
Page: 
86-100
|
DOI: 
https://doi.org/10.18280/ama_c.720106
Received: 
15 March 2017
|
Accepted: 
15 April 2017
|
Published: 
31 March 2017
| Citation

OPEN ACCESS

Abstract: 

With medium carbon steel as the research object, this paper explores the regularities of hydrogen diffusion by electrochemical hydriding, establishes a macro-micro hydrogen diffusion simulation model, and obtains the regularities of hydrogen concentration distribution at different initial hydrogen concentrations and different hydriding times. Based on the test results, the authors get reasonable values of parameters that are difficult to measure, such as the initial concentration coefficient α. To disclose the formation mechanism of hydrogen-induced blisters, this paper analyzes the regularities of hydrogen concentration, diffusion and condensation in hydrogen traps from the micro perspective. The macro-micro hydrogen diffusion simulation model offers a simulation method to similar electrochemical experiments, helps predict hydrogen diffusion and condensation in cases that are difficult to measure, and provides clues to prevent “hydrogen embrittlement”.

Keywords: 

Electrochemical hydriding, hydrogen diffusion model, hydrogen-induced blisters, hydrogen pressure

1. Introduction
2. The Electrochemical Hydriding Experiment on Medium Carbon Steel
3. Macro-Micro Finite Element Simulation Model for the Electrochemical Hydriding Experiment
4. Hydrogen Trap Simulation Analysis with Microscopic Crystal Model
5. Conclusion
  References

1. D.T. Kang, Materials and heat treatment of large forging, Beijing: Longmen Book Company, 1998: 106-108. 

2.  J. Li, F.S. Du, Y. Liang, S. Wu, T.Y. Tan, Hydrogen diffusion calculation experiment of the sheet metal, 2016, Iron and steel, vol. 51, no. 7, pp.70-75.

3. G. Chen, L.P. Wang, Fracture properties of different pipeline steels at electrochemical hydrogen charging state, 2014, Heat Treatment of Metals, Beijing, China, vol. 39, no. 7, pp.47-49.

4. L. Hu, J. Chen, B. Wang, Q.Y. Liu, Z.H. Li, Effects of inclusion on hydrogen inducedd cracking susceptibility of pipeline steels under electrochemical hydrogen-charging condition, 2015, Materials for Mechanical Engineering, vol. 39, no. 9, pp.25-31.

5. X.G. Zeng, K. Liu, H. Luo, C.S. Luo, J.H. Zhao J, Study on mechanical behavior of N80 pipeline steel after electrochemical Hydrogen Charging, 2013, Hot Working Technology, vol. 44, no. 6, pp.41-44.

6. Z.X. Wang, B.P. Qu, F. Xue, H. Yang, Experimental investigation of hydrogen embrittlement of 65Mn steel with small punch testing method, 2011, Nuclear Power Engineering, vol. 32, no. 4, pp.14-18.

7. F.S. Du, Y. Li, M. Wang, J. Li, J.K. Fan. Macro-meso cross-scale simulation of forging process, 2014, Chinese Journal of Computational Mechanics, vol. 31, no. 6, pp.799-810.

8. W.Y. Chu, J.X. Li, Y.J. Su, L.J. Qiao. Influence of inclusions on initiation of hydrogen blister in iron, 2007, Acta Metallurgica Sinica, vol. 243, no. 7, pp. 673-677.

9. C.F. Dong, Z.Y. Liu, X.G. Li, Y.F. Cheng. Effects of hydrogen-charging on the susceptibility of X100 pipeline steel to hydrogen-induced cracking, 2009, International journal of hydrogen energy, vol. 34, no24, pp.9879-9884.