The Grain Growth of Austenitic Model Steel during Fast Heating

Abstract:

The metallographic observation, thermo-simulation test and quantitative statistics were used to investigate the grain growth on different parts of the samples for Fe-40Ni-Ti alloy. The experiment results demonstrate that: near the center of the sample corresponding to the summit point of the temperature, the grain grows rapidly in 5s when the temperature reaches 1350°C, whose size is about 180μm; While the grain size of parent metal and HAZ (4mm to the welding line) remains nearly unchanged, whose size is about 80μm. The size of TiN particles in the welding line is fine than that of the parent metal obviously and the hinder to the grain boundaries can be observed. With the aid of Fe-40Ni-Ti alloy, the austenitic grain growth in the steel can be simulated.

• Periodical: Applied Mechanics and Materials (Volumes 644-650)
• Pages: 4772-4775
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.644-650.4772
• Online since: September 2014
• Authors: Shao Qiang Yuan*, Guo Li Liang, Yue Hui Yang
• Keywords: Fe-40Ni-Ti Alloy, Grain Boundary Migration, HAZ, Thermo-Simulation, TiN Particles

References

[1] Keesam S, Thomas F K. Scripta Materialia, 47（2002）, pp.839-844.

[2] Abdollah-Zedeh A, Dunne D P. ISIJ International, Vol43(2003), pp.1213-1218.

[3] YUAN Shaoqiang, ZHANG Xiaojuan. Key Engineering Materials, 609-610(2014), pp.515-520.

[4] Shaoqiang Yuan, Xiaojuan Zhang, Yuehui Yang. Materials Science Forum, 788(2014), pp.272-277.

[5] M. Maalekian, R. Radis, M. Militzer, et al. Acta Materialia, 60(2012), pp.1015-1026.

[6] QI Liang, ZHAO Zhengzhi, ZHAO Aimin, et al. Journal of University of Science and Technology Beijing, 35(2013), pp.304-311.

[7] Wan Decheng, Cai Qingwu, Yu Wei, et al. Heat Treatment of Metals, 38(2013), pp.12-15.

[8] Shaoqiang Yuan, Shanwu Yang, Wenjin Nie, et al. Journal of University of Science and Technology Beijing, 10(2003) , pp.76-78.