Influence of interpass cooling conditions on microstructure and tensile properties of Ti-6Al-4V parts manufactured by WAAM

Wire and arc additive manufacturing (WAAM) technology is growing in interest in the last years. The technology enables the manufacturing of real geometries by overlapping weld beads and is well suited for metallic parts with high buy-to-fly ratio. Manufacturing costs and time are critical issues whi...

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Bibliographic Details
Published inWelding in the world Vol. 64; no. 8; pp. 1377 - 1388
Main Authors Vázquez, L., Rodríguez, N., Rodríguez, I., Alberdi, E., Álvarez, P.
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.08.2020
Springer Nature B.V
Subjects
Additive Manufacturing – Processes
Arc deposition
Beads
Chemistry and Materials Science
Cooling
Cooling effects
Dwell time
Heat treatment
Manufacturing
Materials Science
Mechanical properties
Metallic Materials
Microstructure
Oxidation
Production costs
Research Paper
Simulation and Inspection
Solid Mechanics
Surface finishing
Tensile properties
Theoretical and Applied Mechanics
Titanium base alloys
Interpass cooling
Microstructure
Ti-6Al-4V
Dwell time
WAAM
Tensile properties
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Summary:Wire and arc additive manufacturing (WAAM) technology is growing in interest in the last years. The technology enables the manufacturing of real geometries by overlapping weld beads and is well suited for metallic parts with high buy-to-fly ratio. Manufacturing costs and time are critical issues which determine the business case. Therefore, it is necessary to develop strategies that minimise the production time while meeting quality requirements. In this regard, cooling conditions are a key factor to reduce time and determine mechanical properties and resulting microstructure. This study aims at investigating the effect of interpass cooling conditions on resulting mechanical properties and microstructure of Ti-6Al-4V alloy. The influence of dwell time between successive deposition of layers is investigated both for air and forced interpass cooling. Forced cooling is done by using water-cooled anvil under base plate. The goal is to find a minimum dwell time to maximise arc-on time and deposition rate while avoiding wall collapse, widening, oxidation and the need to apply post building heat treatment. Obtained mechanical properties are compared with standards for products manufactured by conventional manufacturing. Additionally, microstructure, surface finishing and part accuracy of WAAM samples are characterised.
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ISSN:0043-2288
1878-6669
DOI:10.1007/s40194-020-00921-3