Microstructure and Properties of Thin-Wall Part by Laser Metal Deposition Shaping

Abstract:

Laser additive direct deposition of metals is a new rapid manufacturing technology, which combines with computer aided design, laser cladding and rapid prototyping. The advanced technology can build fully-dense metal components directly from CAD files without a mould or tool. With this technology, a promising rapid manufacturing system called “Laser Metal Deposition Shaping (LMDS)” is being constructed and developed. Through the LMDS technology, fully-dense and near-net shaped metallic parts can be directly obtained through melting coaxially fed powder with a laser. Typically, the microstructure and mechanical properties of the as-formed thin-wall part were tested and analyzed synthetically. The results show that there are different grain categories distributing in certain position of thin-wall part, and the mechanical properties represent as anisotropy.

• Periodical: Materials Science Forum (Volumes 675-677)
• Pages: 563-566
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.675-677.563
• Online since: February 2011
• Authors: Kai Zhang, Xiao Feng Shang
• Keywords: Grain Categories, Laser Metal Deposition Shaping (LMDS), Microstructure, Property Analysis, Thin-Wall Part

References

[1] Li, P., Ji, S.Q., Zeng, X.Y., Hu, Q.W., Xiong, W.H., 2007. Direct Laser Fabrication of Thin-Walled Metal Parts under Open-Loop Control. International Journal of Machine Tools & Manufacture, 47(6): 996-1002.

DOI: 10.1016/j.ijmachtools.2006.06.017

[2] Huang, F.X., Jiang, Z.H., Liu, X.M., Lian, J.S., Chen, L., 2009. Microstructure and Properties of Thin Wall by Laser Cladding Forming. Journal of Materials Processing Technology, 209(11): 4970-4976.

DOI: 10.1016/j.jmatprotec.2009.01.019

[3] Smurov, I., 2008. Laser Cladding and Laser Assisted Direct Manufacturing. Surface & Coatings Technology, 202(18): 4496-4502.

DOI: 10.1016/j.surfcoat.2008.04.033

[4] Zhang, K., Liu, W.J., Shang, X.F., 2007. Research on the Processing Experiments of Laser Metal Deposition Shaping. Optics & Laser Technology, 39(3): 549-557.

DOI: 10.1016/j.optlastec.2005.10.009

[5] Hunt, J.D., 1984. Steady State Columnar and Equiaxed Growth of Dendrites and Eutectic. Materials Science and Engineering, 65(1): 75-83.

DOI: 10.1016/0025-5416(84)90201-5

[6] Zhou, Y.H., Hu, Z.Q., Jie, W.Q., 1998. Solidification Technology. China Machine Press, Beijing, China (in Chinese).

[7] Lu, J.G., 2004. Research on Process and Microstructure of Thin Parts in Laser Cladding Forming. M.S. Thesis, Hunan University, Changsha, China (in Chinese).

[8] Zhang, K., Liu, W.J., Shang, X.F., 2007. Characteristics of Laser Aided Direct Metal Powder Deposition Process for Nickel-based Superalloy. Materials Science Forum, Vols. 534-536: 457-460.

DOI: 10.4028/www.scientific.net/msf.534-536.457