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Sivateja et al. / Structural Integrity Procedia 00 (2023) 000 – 000

Chinnam Sivateja et al. / Procedia Structural Integrity 60 (2024) 245–255

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Acknowledgements The authors gratefully acknowledge the support from CSIR- National Aerospace Laboratories and sincerely thank the expertise and assistance received from Dr Sujatha, MSD for fractography studies. We sincerely thank technical support from Mrs. Kalavati, MS Division, for imaging through SEM, and Mr Naveena, HT of RNC Division, for coordinating the sample preparation and testing. We sincerely thank Mr Pushpendra Kumar Dwivedi, MME Dept. of NIT Rourkela, for assisting us in carrying out residual stress measurements. References: Arola, D., and Williams, C. L., 2002. Estimating the fatigue stress concentration factor of machined surfaces. International Journal of Fatigue 24, 923 – 930, https://doi.org/10.1016/S0142-1123(02)00012-9 ASM Vol. 13B (2007). Stephen D. Cramer ; Bernard S. Covino, Jr., ASM Handbook, Volume 13B, Corrosion: Materials. Corrosion. 2007 Oct 1;63(10):983. ASTM E8. Standard Test Methods of Tension Testing of Metallic Materials, Annual Book of ASTM Standards, American Society for Testing and Materials, Vol. 3.01 ASTM E466. Standard Practice for Conducting Constant Amplitude Axial Fatigue Tests of Metallic Specimens. Annual Book of ASTM Standards, American Society for Testing and Materials, Vol. 3.01 Çakır , O., 2008. Chemical etching of aluminum. Journal of materials processing technology. 2008 Apr 1;199(1-3):337-40. CCFAM 2000. Corrosion and Corrosion Fatigue of Airframe Materials, Federal Aviation Administration. Report Number: DOT/FAA/AR-00/22, July 2000. Eftekhari. A., 2008. Nanostructured materials in electrochemistry. Wiley-VCH. Liao, M. W. and Chung, C. K., 2013. The role and effect of residual stress on pore generation during anodization of aluminum thin films. Corros Sci, vol. 74, pp. 232 – 239, Sep. 2013, doi: 10.1016/j.corsci.2013.04.047. MIL-HDBK-5J, 2003. Department of Defense handbook metallic materials and elements for aerospace vehicle structures. Newman Jr, JC., Raju, IS.,1981. An empirical stress-intensity factor equation for the surface crack. Engineering fracture mechanics, 15(1-2):185 92. Schneider, M., Fürbeth, W.,2022. Anodizing — The pore makes the difference. Materials and Corrosion, 73(11):1752-65. Sefer, B., Gaddam, R., Roa, J. J., Mateo, A., Antti, M. L. and Pederson, R., 2016. Chemical milling effect on the low cycle fatigue properties of cast Ti – 6Al – 2Sn – 4Zr – 2Mo alloy. International Journal of Fatigue, vol. 92, pp. 193 – 202, Nov. 2016, doi: 10.1016/j.ijfatigue.2016.07.003. Sesana, R., Spriano, S., Ferraris, S. and Matteis, P., 2019. Fatigue resistance of light alloy sheets undergoing eco-friendly chemical milling: Metallurgical and chemical aspects. Procedia Structural Integrity , Elsevier Ltd, 2019, pp. 362 – 369. doi: 10.1016/j.prostr.2019.12.039. Shahzad, M., Chaussumier, M., Chieragatti, R., Mabru, C. and Rezai-Aria, F., 2010. Influence of anodizing process on fatigue life of machined aluminium alloy. Procedia Engineering, Elsevier Ltd, 2010, pp. 1015 – 1024. doi: 10.1016/j.proeng.2010.03.110. Shimpo, R., Ichikawa, E., Sugiyama, Y., Hoshino, S., 2003. Mechanical Properties of Anodic Oxide Films on Aluminium, J Surf Finishing Soc Japan, 54, pp. 794-797. Spear, A. D. and Ingraffea, A. R., 2013. Effect of chemical milling on low-cycle fatigue behavior of an Al-Mg-Si alloy. Corros Sci , vol. 68, pp. 144 – 153, Mar. 2013, doi: 10.1016/j.corsci.2012.11.006. Suresh S., 1998. Fatigue of materials. Cambridge university press; 1998. Wang, S., Peng, H., Shao, Z., Zhao, Q. and Du, N., 2016. Sealing of anodized aluminum with phytic acid solution. Surf Coat Technol, vol. 286, pp. 155 – 164, 2016, doi: 10.1016/j.surfcoat.2015.12.024. Wragg, D. A., Davies, D. P. and Jenkins, S. L., 2022. Influence of and differences between Chromic and Sulphuric acid anodising on the fatigue properties of 7050 T7451 aluminium alloy. International Journal of Fatigue, vol. 163, Oct. 2022, doi 10.1016/j.ijfatigue.2022.107026.