Progress in Additive Manufacturing Technique Based on Pulsed TIG

Abstract

Additive manufacturing based on PTIG (pulsed tungsten inert gas, PTIG) is a branch of arc additive manufacturing technique. Its notable advantages are low cost, high deposition rate, high material utilization ratio, and suitable for manufacturing parts of large size. In this paper, the research results on the control of formation quality, microstructure and properties of the parts deposited by PTIG additive manufacturing were emphasized in view of experimental research and numerical simulation. Meanwhile, the shortcomings of current investigations were also summarized. Based on accurate prediction and accurate control on the formation quality, microstructure and properties, the research directions for further study on PTIG additive manufacturing technique in the future were put forward, including the influence mechanism of process factors on the formation quality, defects forming mechanism and the suppression measures, numerical simulation on microstructure evolution in molten pool, formation and regulation mechanisms on internal stress and deformation,and the establishment on quantitative relationship model between the microstructure and mechanical properties.

Keywords

• pulsed TIG
• additive manufacturing
• formation quality
• microstructure
• mechanical property