Analysis of Thermal Elasto-Plastic Stress during Pulsed Laser Heating a K418 Alloy Plate

Abstract:

The paper presents a study on analysis of thermal elasto-plastic stress during pulsed laser heating a K418 alloy plate. Based on elasto-plastic constitutive relationship, a spatial finite element model was established to simulate the whole process. The distribution and evolutions of temperature and stress field was calculated. The stresses induced during the process are highly heterogeneous because of the recurrent changing temperature field. The stresses during the process fluctuate as the temperature field changes. High level tensile residual stresses reside in the fusion zone after the laser process. Compared to all other stress components, longitudinal stress is the highest and will have considerable influences over the distortion level and failure of the material.

• Periodical: Advanced Materials Research (Volumes 538-541)
• Pages: 1892-1896
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.538-541.1892
• Online since: June 2012
• Authors: Chang Liang Lu, Fang You Hu, Xu Ren Huang, De Xian Yi, Ai Yong Cui, Bin Hu
• Keywords: Pulsed Laser, Residual Stress, Thermal Stress

References

[1] M. Kalyon, B.S. Yilbas, ImechE, Part C: Mech. Eng. Sci. 215 (2001) 1429–1445.

[2] B.S. Yilbas, I.Z. Naqavi, S.Z. Shuja, ASME. Manuf. Sci. Eng. 124 (2002) 863–874.

[3] B.S. Yilbas, J. Phys. Part D: Appl. Phys. 35 (2002) 1210–1217.

[4] B.S. Yilbas, O. Khan, I. Naqavi, Proc. Inst. Mech. Eng. Part B: Eng. Manuf. 218 (2004) 375–388.

[5] M.Z.H. Khandkar, K. Jamil, ASME International Mechanical Engineering Congress, vol. 374 (2003) 355–360.

[6] Abul Fazal, M.A., Mater. Process. Tech. 136(2003) 120–138.

[7] Sunar, M., Yilbas, B.S., Boran, K., Mater. Process. Tech.172 (2006) 123–129.

[8] Yanbei Chen, Jian Lua, Journal of Materials Processing Technology. 205 (2008) 9–15