Manufacturing Ti-6Al-4V components by shaped metal deposition: microstructure and mechanical properties

Bernd Baufeld, Omer Van Der Biest, Rosemary Gault, Keith Ridgway

Research output: Contribution to journalConference Contribution

33 Citations (Scopus)
4 Downloads (Pure)

Abstract

The urge in aeronautics to reduce cost and time to flight of components without compromising safety and performance stimulates the investigation of novel manufacturing routes. Shaped Metal Deposition (SMD) is an innovative time-compression technology, which creates near-net shaped components layer by layer by weld deposition. Especially for Ti alloys, which are difficult to shape by traditional methods such as forging, machining and casting and for which the loss of material during the shaping process is also very expensive, SMD promises great advantages. Applying preliminary SMD parameter, four different tubular components with a square cross section and wall thicknesses of about 9 mm were built. The microstructure of the Ti-6Al-4V components consists of large prior β grains, elongated along the temperature gradient during welding, which transform into a lamellar α/β substructure at room temperature. The ultimate tensile strength was between 880 and 1054 MPa. The strain at failure was between 3.0 and 11.3 % for tensile testing parallel to the deposition plane and between 9.1 and 16.4 % perpendicular to the deposition plane. The micro-hardness (3.1 - 3.4 GPa), the Young's modulus (117 - 121 GPa) and the oxygen and nitrogen content are comparable to cast Ti-6Al-4V material.
Original languageEnglish
Number of pages8
JournalIOP Conference Series: Materials Science and Engineering
Volume26
Issue number1
DOIs
Publication statusPublished - 2011
EventTrends in Aerospace Manufacturing Conference, TRAM09 - Rotherham , United Kingdom
Duration: 9 Sep 200910 Sep 2009

Keywords

  • layer by layer
  • metal deposition
  • microstructure and mechanical properties
  • nitrogen content
  • room temperature
  • shaping process
  • square cross section
  • temperature gradient
  • Ti alloys
  • Ti-6al-4v
  • tubular components
  • ultimate tensile strength
  • wall thickness
  • weld deposition
  • young's modulus
  • aluminum
  • innovation
  • manufacture
  • mechanical properties
  • microstructure
  • tensile strength
  • tensile testing
  • vanadium
  • welding
  • titanium alloys

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