J. Mater. Sci. Technol. ›› 2019, Vol. 35 ›› Issue (2): 270-284.DOI: 10.1016/j.jmst.2018.09.004

• Orginal Article • Previous Articles     Next Articles

A review of selective laser melting of aluminum alloys: Processing, microstructure, property and developing trends

Jinliang Zhanga, Bo Songa*(), Qingsong Weia, Dave Bourellb, a   

  1. aState Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
    bDave Bourell Laboratory for Freeform Fabrication, Mechanical Engineering Department, The University of Texas at Austin, Austin, TX, 78712, USA
  • Received:2018-03-29 Revised:2018-04-26 Accepted:2018-05-22 Online:2019-02-05 Published:2018-12-21
  • Contact: Song Bo
  • About author:

    These authors contributed equally to this work.

Abstract:

Selective laser melting (SLM) is an attractive rapid prototyping technology for the fabrication of metallic components with complex structure and high performance. Aluminum alloy, one of the most pervasive structural materials, is well known for high specific strength and good corrosion resistance. But the poor laser formability of aluminum alloy restricts its application. There are problems such as limited processable materials, immature process conditions and metallurgical defects on SLM processing aluminum alloys. Some efforts have been made to solve the above problems. This paper discusses the current research status both related to the scientific understanding and technology applications. The paper begins with a brief introduction of basic concepts of aluminum alloys and technology characterization of laser selective melting. In addition, solidification theory of SLM process and formation mechanism of metallurgical defects are discussed. Then, the current research status of microstructure, properties and heat treatment of SLM processing aluminum alloys is systematically reviewed respectively. Lastly, a future outlook is given at the end of this review paper.

Key words: Selective laser melting, Aluminum alloy, Metallurgical defects, Mechanical properties, Heat treatment, Developing trend