Optimization of Fatigue Response in Notched AISI 316L Friction Welded Joints Using a Hybrid Entropy-VIKOR-Taguchi Approach
Optimization of Fatigue Response in Notched AISI 316L Friction Welded Joints Using a Hybrid Entropy-VIKOR-Taguchi Approach |
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| © 2025 by IJETT Journal | ||
| Volume-73 Issue-3 |
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| Year of Publication : 2025 | ||
| Author : Jagadesh Kumar Jatavallabhula, Vaddi Venkata Satyanarayana, Vasudeva Rao Veeredhi |
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| DOI : 10.14445/22315381/IJETT-V73I3P120 | ||
How to Cite?
Jagadesh Kumar Jatavallabhula, Vaddi Venkata Satyanarayana, Vasudeva Rao Veeredhi, "Optimization of Fatigue Response in Notched AISI 316L Friction Welded Joints Using a Hybrid Entropy-VIKOR-Taguchi Approach," International Journal of Engineering Trends and Technology, vol. 73, no. 3, pp. 265-273, 2025. Crossref, https://doi.org/10.14445/22315381/IJETT-V73I3P120
Abstract
Current research investigates the effect of notch geometric parameters, viz. width, depth, and central angle, on the fatigue life and stress amplitude of friction-welded AISI 316L stainless steel joints. Despite the extensive use of friction welding, a critical gap exists in understanding how notch geometry influences fatigue performance in engineering applications. The current study addresses this gap by employing a hybrid Entropy-VIKOR-Taguchi technique to optimize fatigue life and minimize stress amplitude. Fatigue specimens were prepared from friction-welded rods according to ASTM E606 standards, with varying notch geometries based on a Taguchi L9 orthogonal array. The un-notched specimen exhibited a fatigue life of 5285 cycles, while notched specimens showed a range from 150 to 1627 cycles. The maximum stress amplitude required to maintain a strain amplitude of 0.3% is 486.70 MPa for the un-notched specimen, whereas, for the notched specimens, it ranges between 332.76 and 540.99 MPa. Optimal parameters were identified as mid-level notch width and depth with a low central angle, leading to a significant improvement in fatigue life and reduced stress amplitude. The ANOVA results show that the notch central angle contributes the most to the overall optimization of the responses, accounting for 31.55%, followed by notch depth at 29.10% and notch width at 20.85%.
Keywords
Fatigue, Notch, VIKOR, Stress amplitude, Strain amplitude, Scanning electron microscope.
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