Investigation of the Effect of Heating-Lines on Tensional Mechanical Properties of Sheet Metal after Laser Forming

Abstract:

In this study，tensional mechanical properties of sheet metal with different heating-lines after laser forming are investigated. The basic mechanical properties of material (such as elastic modulus, yield strength, ultimate strength, TEI (total elongation index) and EIU (elongation index of uniform)) with different spacing between neighbored heating-lines and different heating-lines number are presented. The stress-strain curves are complied with a modified Swift law, where the hardening coefficient and strain hardening exponent of material are controlled by strain. The influence of heating-lines number on tensional mechanical properties of material is greater than that of the spacing between neighbored heating-lines. The results show that all mechanical properties are related to the distribution of microstructure in heat-affected zone after laser forming.

• Periodical: Applied Mechanics and Materials (Volumes 117-119)
• Pages: 1666-1671
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.117-119.1666
• Online since: October 2011
• Authors: Ai Hui Luo, Wen Jiao Dan, Wei Gang Zhang
• Keywords: Heating-Line, High Strength Steel (HSS), Laser Forming, Mechanical Property, Stress-Strain Curve

References

[1] Namba Y., Laser forming in space. Proceeding of the International Conference on lasers'85, editor: Wang C. P., Osaka, Japan, (1986) pp.403-407.

[2] Scully K., Laser line heating. Journal of Ship Production.1987, 4(3): pp.237-246.

[3] Thomson G. and Pridham M., Material property changes associated with laser forming of mild steel components. Journal of Material Processing Technology, 2001, 118(1): pp.40-44.

DOI: 10.1016/s0924-0136(01)00859-7

[4] Vollertsen F., An analytical model for laser bending, Lasers in Engineering, 1994, (2): p.261–276.

[5] C.J. Yau, K.C. Chan, et al., A new analytical model for laser bending, M.Geiger, F. Vollertsen, Eds., Laser Assisted Net Shape Engineering 2, in: Proc. of the LANE'97, Meisenbach Bamberg, 1997.

[6] A.K. Kyrsanidi, T.B. Kermanidis, et al., An analytical model for the prediction of distortions caused by the laser forming process, J. Mater. Process. Technol, 2000, 104: p.94–102.

DOI: 10.1016/s0924-0136(00)00520-3

[7] K. Dai and L. Shaw, Thermal and mechanical finite element modeling of laser forming from metal and ceramic powders. Acta Materialia, 2004(52): pp.69-80.

DOI: 10.1016/j.actamat.2003.08.028

[8] Y. J. Fan, Z. S. Yang, et al., Investigation of effect of phase transformations on mechanical behavior of AISI 1010 steel in laser forming. Journal of Manufacturing Science and Engineering-Transactions of the ASME, 2007 (129): pp.110-116.

DOI: 10.1115/1.2162911

[9] J. Chen, X. M. Zhao, et al., Study on Mechanical Properties of Superalloy by Laser Rapid Forming. Rare Metal Materials and Engineering, 2008 (37): pp.1664-1668.

[10] S. Y. Zhang, X. Lin, et al., Effect of solution temperature and cooling rate on microstructure and mechanical properties of laser solid forming Ti-6Al-4V alloy. Chinese Optics Letters 2009(7): pp.498-501.

DOI: 10.3788/col20090706.0498

[11] S. Y. Zhang, X. Lin, et al., Heat-treated microstructure and mechanical properties of laser solid forming Ti-6Al-4V alloy. Rare Metals, 2009(28): pp.537-544.

DOI: 10.1007/s12598-009-0104-5

[12] J. Chen, S. Y. Zhang, et al., Mechanical properties of Ti-6Al-4V alloy by laser rapid forming. Rare Metal Materials and Engineering, 2007 (36): pp.475-479.

[13] X. M. Zhao, J. Chen, et al., Study on microstructure and mechanical properties of laser rapid forming Inconel 718. Materials Science and Engineering-A, 2008(478): pp.119-124.

DOI: 10.1016/j.msea.2007.05.079

[14] X. M. Zhao, X. Lin, et al., The effect of hot isostatic pressing on crack healing, microstructure, mechanical properties of Rene88DT superalloy prepared by laser solid forming. Materials Science and Engineering-A, 2009 (504): pp.129-134.

DOI: 10.1016/j.msea.2008.12.024

[15] H. Shen, and Z. Q. Yao, Study on mechanical properties after laser forming. Optics and Lasers in Engineering, 2009(47): pp.111-117.

DOI: 10.1016/j.optlaseng.2008.07.010

[16] H. Y. Yu, 2005, Investigation on Transformation-induced plasticity behaviour in complex strain state for TRIP steels and its application into formability prediction autobody panels. Ph.D. Thesis, Shanghai JiaoTong University, Shanghai, China. (In Chinese).