Microstructures in Solidification Simulation of Electron Beam Scanning with MC in Molten Pool

Abstract:

The solidification microstructure of electron beam scanning is important to product performance. The solidification process of molten pool temperature field and 2D simulation mathematical model of grain growth was established based on heat transfer and the physics of growth process of crystal grains. The heat distribution, thermal physical parameters and influence of thermal radiation on the temperature field was considered during the analysis process. The distribution of temperature field was solved by COMSOL. The process of solidification was simulated by using Monte Carlo method. Using optical microscope to observe the solidified microstructure of bath. The simulation results show that the mathematical model can reasonably describe the grain growth process, the temperature field and the simulation of microstructure morphology.

• Periodical: Advanced Materials Research (Volume 898)
• Pages: 168-172
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.898.168
• Online since: February 2014
• Authors: Rong Wang*, Yi Liu, De Qiang Wei
• Keywords: Bath, Electron-Beam Scanning, Monte Carlo Method, Solidification Microstructure

References

[1] Sun Xitai. Material surface strengthening technology [M]. Materials protection, Beijing: chemical industry press, 2005: 207.

[2] Wang Liqun. Monte Carlo simulation of grain growth in the heat-affected-zone of laser welding [D]. Wuhan: huazhong university of science and technology, (2004).

[3] Xiao Jilin. 3D simulation of grain growth in welding heat-affected zone by Monte Carlo technique [D]. Harbin: Harbin institute of technology, (2006).

[4] Xiao Gongqiang et al. The Monte Carlo simulation of grain growth and research of algorithm applied [J]. Journal of Nanchang university, 2004(9): 22-25.

[5] Zhang Jixiang et al. A modified Monte Carlo method in grain growth simulation [J]. Journal of mental. 2004(5): 457-461.

[6] Wang Kuangfei et al. Development of simulation and study on Monte Carlo method for grain growth[J]. Hot working Technology. 2009(8): 101-104.

[7] Wang yi and Haiyan Zhao. Establishment of double ellipsoid heat source model in numerical simulation of electron beam welding [J]. Chinese Journal of mechanical. 2004(2): 165-169.

DOI: 10.3901/jme.2004.02.165

[8] Liu Jianglong et al. Heat treatment of high-energy beam [M]. Beijing: Machinery industry press, (1997).

[9] Chang W S, Na S J.A. study on the predition of the laser weld shape with varying heat source equations and the thermal distortion of a small structure in mirco-joining[J]. Journal of Materials Processing, 2002: 208-214.

DOI: 10.1016/s0924-0136(01)00716-6

[10] Wu Su et al. New heat source model of numerical simulation of high-energy beam welding [J], 2004(1): 91-94.

[11] Wang Zhutang and Rongzhang Tian. Aluminum and processing manual [M]. Hunan: central south university press, (2000).