Session: 03-01 Metals: Post Processing Topics

Paper Number: 93968

93968 - Effects of Post Processing Techniques on Mechanical Properties in Gmaw Wire Arc Additive Manufacturing of Ti 6al 4v 

Effects of Post Processing Techniques on Mechanical Properties in GMAW Wire Arc Additive Manufacturing of Ti 6Al 4V

Itziar Minondo, Ana Gómez, Ester Porras.

High residual stress, distortion and anisotropy are the major challenges faced by components produced using GMAW (Metal Inert Gas Welding) wire arc additive manufacturing (WAAM). This study focuses on titanium, Ti 6Al 4V, with respect to mechanical properties and their improvement with different post-welding processes. All the samples were obtained with the same processing conditions, such as substrate thickness, interlayer temperature, deposit height and electrical parameters. The effects of post processing such as heat treatments, in line hot micro-rolling, and hot isostatic pressure on the magnitude and distribution of mechanical properties were investigated. In line hot micro-rolling was found to have a major influence on the mechanical properties while heat treatments reduce anisotropy. Tensile strengths reach values similar to forged material. Depending on the final geometry and layer high, in line hot micro-rolling produced micro-cracks that heavily reduced the samples strength.

Issue Section: Research Papers

Keywords: Titanium alloy Ti 6Al 4V, post-welding heat treatment, in line micro-rolling, hot isostatic pressure, wire arc additive manufacturing (WAAM)

Topics: Additive manufacturing, Titanium alloys, Temperature, Tension, Welding, Yield strength, Tensile strength

Presenting Author: Itziar Minondo FUNDACION IDONIAL

Presenting Author Biography: Itziar Minondo. PhD in Mechanical Engineering from the University of Oviedo and International Welding Engineer from the International Institute of Welding (iiw) and European Welding Engineer from the European Welding Federation (EWF). For more than 10 years he has worked in different companies of the multinational Thyssenkrupp in sectors such as the automotive industry and passenger transport. She has been lecturing for more than 10 years at the University of Oviedo in the Department of Construction and Manufacturing Engineering. Since 2014 he has been part of the Materials Technology Institute as an R&D technician responsible for the Union Technologies and Welding area. She has participated in more than 50 regional, national and international projects related to welding Technologies.

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