PSI - Issue 42

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000 – 000 tr t r l I t rit r i ( ) Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ il l li t . i i t.

www.elsevier.com/locate/procedia . l i r. /l t / r i

ScienceDirect

Procedia Structural Integrity 42 (2022) 594–601

© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the 23 European Conference on Fracture – ECF23 damage mechanisms are discussed in this work. © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23 Keywords: Corrosion; Friction Stir Weld; Fatigue; Aluminum 1. Introduction Aluminum 2024 alloy due to its better strength and lightweight, finds widespread application in the field of aerospace, marine, and civil structures. This class of aluminum alloy finds extensive application in the wings and fuselages of the aircraft. To produce large structures, these parts often being welded using conventional welding t . li l i . . This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-n / . / i i ilit t : rr i ; ri ti tir l ; ti ; l i . i l i ll t it tt t t li t i t, i i li ti i t i l , i , i il t t . i l l i ll i t i li ti i t i l t i t. l t t , t t t i l i ti l l i 23 European Conference on Fracture - ECF23 Effect of Corrosion on Fatigue Behavior of Welded AA2024-T3 Alloy V.K. Yadav a , V. Gaur a,* , I.V. Singh a a Department of Mechanical & Industrial Engineering, Indian Institute of Technology Roorkee, Uttarakhand-247667, India Abstract This study investigates the combined effect of pre-corrosion and microstructural inhomogeneity due to welding on the corrosion resistance and its subsequent effect on fatigue crack growth resistance in the aluminum alloy 2024. Electrochemical Impedance Spectroscopy (EIS) and potentiodynamic polarization techniques were utilized to assess the corrosion phenomena. The localized corrosion results showed that weld nugget zone due to finer grains have better corrosion resistance compared to the columnar grains in the as-received material. The fatigue behavior of corroded specimens, after 100 hours of immersion in 3.5% NaCl solution, was investigated under load-controlled sinusoidal waveform at 10 Hz frequency. The tests were performed at two different load-ratios: 0.1 and 05. Pre-corrosion has detrimental effect on the fatigue behavior due to the localized pitting, and the results along with their underlying Alloy , a a t t f i l I t i l i i , I i I tit t f l , tt - , I i i t i ti t t i t i i t t l i it t l i t i i t it t t ti t i t i t l i ll . l t i l t t ti i l i ti t i tili t t i . l li i lt t t l t t i i tt i i t t t l i i t i t i l. ti i i , t i i i . l l ti , i ti t l t ll i i l t . t t t t i t l ti : . . i t i t l t t ti i t t l li itti , t lt l it t i l i i i i t i .

* Corresponding author. Tel.: +91-1332-284909 E-mail address : vidit.gaur@me.iitr.ac.in i t . l.: il : i it. .iit . .i

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23 l i r . . i i rti l r t - - li ( tt :// r ti . r /li / - - / . /) i i ilit t - t r . li

2452-3216 © 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the 23 European Conference on Fracture – ECF23 10.1016/j.prostr.2022.12.075