What is it about?
18 % nickel maraging steels are known for their excellent combination of ultrahigh strength and high fracture toughness. The steels find extensive application in aerospace sector. Joining by welding comes into picture almost always, while fabricating structures using this material. Weld joints produced with the conventional welding techniques do not enjoy high levels of strength and toughness like the base metal. The innovative welding process presented here provides a solution to this limitation.
Featured Image
Photo by Bill Jelen on Unsplash
Why is it important?
Maintaining strength and toughness values in the maraging steel weld joint not less than 90 % of the corresponding base metal values is of paramount importance. This requirement necessitates painstaking development of welding technology. Further, welding of thick sections of maraging steel is an important part of fabrication of aerospace structures. As is well known, welding of thick sections is much more challenging. The welding technology presented here provides a solution on both these counts.
Perspectives
The innovative D-Process MIG welding presented here integrates multiple welding modes, including Gas Metal Arc Welding (GMAW), Single Pulse GMAW and Double Pulse GMAW, allowing for better control of process parameters and reduced heat input during welding. The beneficial effects of reduced heat input during welding have been well documented for this material. The results obtained show the promise that properties of the base metal can largely be retained in the weldment even in thick sections, paving the way for highly efficient exploitation of maraging steel for critical aerospace structures. The publication is based on inputs from the Doctoral Research carried out by Bibin Jose and R Arunprakash under the guidance of Dr M Manikandan. The expert advice of Dr N Arivazhagan was constantly available to these Scholars.
Nageswara Rao Muktinutalapati
Read the Original
This page is a summary of: Innovative D-process MIG welding for enhanced performance of thick sections of MDN 250 in aerospace applications, Welding International, October 2024, Taylor & Francis,
DOI: 10.1080/09507116.2024.2413379.
You can read the full text:
Contributors
The following have contributed to this page
