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316L Stainless Steel with Gradient Porosity Fabricated by Selective Laser Melting

  • Ruidi Li
  • Jinhui Liu
  • Yusheng ShiEmail author
  • Mingzhang Du
  • Zhan Xie
Article

Abstract

To fabricate 316L stainless steel part with a pore gradient structure, the method using selective laser melting (SLM) technique is exploited. Scan tracks feature, densification, and tensile property of SLM-produced samples prepared via different scan speeds were investigated. The results show that the porosity is strongly influenced by scan speed. On this basis, a gradient changed scan speed was applied in every SLM layer for the purpose of producing a gradient porosity metal. The results indicate that the structure exhibits a gradually increased porosity and a reduced molten pool size along the gradient direction of scan speed variation. The forming mechanisms for the gradient porosity were also addressed.

Keywords

pore gradient selective laser melting 316L stainless steel 

Notes

Acknowledgments

The authors gratefully appreciate the financial supports from the National High-Tech Program (863) of China (2007AA03Z115), Independent fund of State Key Laboratory of Material Processing and Die & Mould Technology of Huazhong University of Science & Technology (HUST) and Open fund of State Key Laboratory of Powder Metallurgy of Central South University (2008112022). The authors also thank the Analytic and Testing Center of HUST.

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Copyright information

© ASM International 2009

Authors and Affiliations

  • Ruidi Li
    • 1
  • Jinhui Liu
    • 2
  • Yusheng Shi
    • 1
    Email author
  • Mingzhang Du
    • 3
  • Zhan Xie
    • 3
  1. 1.State Key Laboratory of Material Processing and Die & Mould TechnologyHuazhong University of Science and TechnologyWuhanChina
  2. 2.Heilongjiang Institute of Science and TechnologyHarbinChina
  3. 3.Shichuan Petroleum Perforating Materials LtdLongchangChina

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