On Formation and Estimation of Pores during Selective Laser Melting of Single-Phase Metal Powders

Abstract:

Porous metals are applied in many more fields than other porous materials. Pores in porous metal parts manufactured by selective laser melting (SLM) should not be regarded as defects but favorable characters because they are the main composition of porous metal parts. Therefore, fully densification is not the only target in forming metal parts via SLM. The formation mechanism of pores in SLM is studied mathematically in this article, and mathematical model is built to describe the formation mechanism. It is concluded that the shape of pores and the porosity of parts are the function of SLM processing parameters and the diameter of powder particles. Pores can be controlled and estimated by adjusting processing parameters and the nature of forming materials. Porous metal parts produced by SLM can be applied in many more fields owing that SLM technology is flexible to change the shape of these part and the nature of materials.

• Periodical: Advanced Materials Research (Volume 338)
• Pages: 94-101
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.338.94
• Online since: September 2011
• Authors: Jin Hui Liu, Wen Juan Xie, Sheng Bing Xiao, Wei Ling Zhao, Jia Zhang
• Keywords: Controlling, Estimation, Formation, Pores, Selective Laser Melting (SLM)

References

[1] Edson Costa Santos, Masanari Shiomi, Kozo Osakada, Tahar Laoui, International Journal of Machine Tools & Manufacture. 46(2006), p.1459

DOI: 10.1016/j.ijmachtools.2005.09.005

[2] W.O'Neill, C.J. Sutcliffe, R.Morgan, A.Landsborough, K.K.B Hon, Annals of the ClRP , Vol.48(1) (1999),p.151

[3] R. H. Morgan, A. J. Papworth, C. J. Sutcliff, P. Fox, W. O'Neill, Journal of Materials Science. Vol.37(2002), p.3093

[4] R. Morgan, C. J. Sutcliff, W. O'Neill, Journal of Materials Science. Vol.39(2004),p.1195

[5] T H C Childs, C Hauser, and M Badrossamay, Proc. IMechE Part B: J. Engineering Manufacture. Vol. 219(2005), p.339

[6] M. Badrossamay, T.H.C. Childs, International Journal of Machine Tools & Manufacture. Vol.47 ( 2007), p.779

[7] F Abe, E Costa Santos, Y Kitamura, K Osakada, M Shiomi, Proceedings of the Institution of Mechanical Engineers. Vol.217(1) (2003), p.119

[8] Kamran Aamir Mumtaz, Poonjolai Erasenthiran, Neil Hopkinson, Journal of Materials Processing Technology. 195(2008), p.77

[9] I. Yadroitsev, Ph. Bertrand, I. Smurov, Applied Surface Science. Vol.253(2007), p.8064

[10] I. Yadroitsev, L. Thivillon, Ph. Bertrand, I. Smurov, Applied Surface Science. Vol.254(2007), p.980

DOI: 10.1016/j.apsusc.2007.08.046

[11] E C Santos, K Osakada, M Shiomi, Y Kitamura, F Abe, Proceedings of the Institution of Mechanical Engineers. Vol.218 (7) (2004), p.711

[12] A. Simchi and H. Asgharzadeh, Materials Science and Technology. Vol.20(2004), p.1462

[13] A. Simchi, Metallurgical and Materials Transactions B. Vol.35B(2004), p.937

[14] A. Simchi, Materials Science and Engineering A. Vol.428(2006), p.148

[15] D. Gu, Y. Shen, Applied Surface Science. Vol.255(2008), p.1880

[16] Liu Peisheng:Testing method for porous materials ( Tinghua University Publications,Beijing 2005).

[17] Lu Jian, Ni Xiaowu, He Anzhi: Physics of interaction of laser and materials, (Mechanical Industrial Publications, Beijing 1996).

[18] Wang Jiajin: Laser Process Technologies, (Chinese Measurement Publications, Beijing 1992).

[19] Yao Huashan， Shi Yusheng， Zhang Wenxian， Liu Jinhui， Huang Shuhuai, Applied laser. Vol.27(12) (2007), p.456

[20] Frenkel, J., Journal of Physics. Vol.9(1945), p.385