Abstract
AbstractAmong Additive Manufacturing technologies, Wire and Arc Additive Manufacturing process is strongly dependent of deposition conditions such as welding parameters, substrate temperature, trajectory. In this research, geometry and temperature evolutions of single beads have been investigated according to process parameters modifications. For our experiment, a heating device have been used in order to control the substrate temperature from room temperature up to 400 °C. Considering the Cold Metal Transfer technology, welding parameters, Wire Feed Speed (WFS) and Travel Speed (TS), have been modified while keeping a constant ratio λ (WFS/TS). Results indicate that weld bead geometry, height (h) and width (w), is influenced by substrate temperature and welding parameters. It has been shown that substrate temperature, itself influenced by process parameters, tends to produce thicker and lower weld beads while it increases.
Highlights
Additive Manufacturing (AM) technologies build up materials layer by layer, allowing complex shapes to be produced
It has been shown that substrate temperature, itself influenced by process parameters, tends to produce thicker and lower weld beads while it increases
Wire and Arc Additive Manufacturing (WAAM) technology, several modes of energy distribution are available according to suppliers
Summary
Additive Manufacturing (AM) technologies build up materials layer by layer, allowing complex shapes to be produced. CMT process requires much less energy to work than tungsten inert gas (TIG) or plasma processes Thanks to this lower energy, thin plates and low cladding of aluminum alloys have been possible. This specificity have been exploited in WAAM as, for example, several studies have shown its interest to be able to produce parts with maximize density [3–5]. As CMT technology uses a lower amount of energy compared to other techniques, it allows to minimize these deformation induced by heat accumulation. When it comes to parts with complex
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