Microscopic, fracture, and tensile strength assessment of laser welded joint of Nimonic 80A: An optimization
Suman Kumar SAURABH, Prabha CHAND, Umacharan Singh YADAV
Abstract. The performance attributes of welding processes are greatly enhanced by superalloy. Nimonic 80A is a renowned superalloy for its exceptional strength retaining at high temperature and good weldability. The aim was to scrutinize the microstructure and fracture patterns of welded superalloy 80A joints, particularly through Laser welding. Taguchi analysis was used to determine the best laser power, welding speed, focal distance, and gas flow rate to get the strongest welded specimens. An L9 orthogonal array was utilized, estimating the ultimate tensile strength of the specimens. Microstructure and fracture analyses were performed, providing further insights. The primary goal of this investigation was to improve the UTS of Nimonic 80A welded joints. It was determined that the optimal welding strength of 809 MPa was achieved at a laser power of 1600 W, a speed of 2200 mm/s, a focal distance of 18 mm, and a gas flow rate of 10 lpm.
Keywords
Fracture, Microstructure, Nimonic 80A, Optimization, Tensile Strength
Published online 3/1/2025, 11 pages
Copyright © 2025 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Suman Kumar SAURABH, Prabha CHAND, Umacharan Singh YADAV, Microscopic, fracture, and tensile strength assessment of laser welded joint of Nimonic 80A: An optimization, Materials Research Proceedings, Vol. 49, pp 475-485, 2025
DOI: https://doi.org/10.21741/9781644903438-48
The article was published as article 48 of the book Mechanical Engineering for Sustainable Development
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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