Mechanical Properties of Ti6Al4V Fabricated by Laser Powder Bed Fusion: A Review Focused on the Processing and Microstructural Parameters Influence on the Final Properties

Flávio Bartolomeu*, Michael Gasik, Filipe Samuel Silva, Georgina Miranda

*Corresponding author for this work

Research output: Contribution to journalReview Articlepeer-review

25 Citations (Scopus)
165 Downloads (Pure)

Abstract

Ti6Al4V alloy is an ideal lightweight structural metal for a huge variety of engineering applications due to its distinguishing combination of high specific mechanical properties, excellent corrosion resistance and biocompatibility. In this review, the mechanical properties of selective laser-melted Ti6Al4V parts are addressed in detail, as well as the main processing and microstructural parameters that influence the final properties. Fundamental knowledge is provided by linking the microstructural features and the final mechanical properties of Ti6Al4V parts, including tensile strength, tensile strain, fatigue resistance, hardness and wear performance. A comparison between Laser Powder Bed Fusion and conventional processing routes is also addressed. The presence of defects in as-built Ti6Al4V parts and their influences on the mechanical performance are also critically discussed. The results available in the literature show that typical Laser Powder Bed–Fused Ti6Al4V tensile properties (>900 MPa yield strength and >1000 MPa tensile strength) are adequate when considering the minimum values of the standards for implants and for aerospace applications (e.g., ASTM F136–13; ASTM F1108–14; AMS4930; AMS6932).

Original languageEnglish
Article number986
Pages (from-to)1-22
Number of pages22
JournalMetals
Volume12
Issue number6
DOIs
Publication statusPublished - Jun 2022
MoE publication typeA2 Review article, Literature review, Systematic review

Keywords

  • additive manufacturing
  • fatigue
  • laser powder bed fusion
  • microstructure
  • tensile strength

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