Additive manufacturing of metals: a brief review of the characteristic microstructures and properties of steels, Ti-6Al-4V and high-entropy alloys

Stéphane Gorsse, Christopher Hutchinson, Mohamed Gouné, Rajarshi Banerjee

Research output: Contribution to journalReview ArticleResearchpeer-review

126 Citations (Scopus)

Abstract

We present a brief review of the microstructures and mechanical properties of selected metallic alloys processed by additive manufacturing (AM). Three different alloys, covering a large range of technology readiness levels, are selected to illustrate particular microstructural features developed by AM and clarify the engineering paradigm relating process–microstructure–property. With Ti-6Al-4V the emphasis is placed on the formation of metallurgical defects and microstructures induced by AM and their role on mechanical properties. The effects of the large in-built dislocation density, surface roughness and build atmosphere on mechanical and damage properties are discussed using steels. The impact of rapid solidification inherent to AM on phase selection is highlighted for high-entropy alloys. Using property maps, published mechanical properties of additive manufactured alloys are graphically summarized and compared to conventionally processed counterparts.

Original languageEnglish
Pages (from-to)584-610
Number of pages27
JournalScience and Technology of Advanced Materials
Volume18
Issue number1
DOIs
Publication statusPublished - 31 Dec 2017

Keywords

  • 3D printing
  • Additive manufacturing
  • microstructure
  • steels, high entropy alloys
  • Ti alloys

Cite this