Marukurthi V N V Satyanarayana, Sagar Yanda, Kethavath Kranthi Kumar, Bade Venkata Suresh, Durga Janaki Venkatesh, Rajani Kanthreddy Kolagotla, Kumar Raja Gudaru
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Effect of multi-pass overlapping friction stir processing on fatigue behavior of Al-Cu alloy
More than half of mechanical breakdowns stem from fatigue failure, often occurring suddenly and without warning. Friction stir processing (FSP) enhances the material's toughness and resilience to fatigue by refining its grain structure. This study investigates how multi-pass overlapping technique impacts the fatigue crack growth rate of FSPed Al-Cu alloy. Microstructural analysis revealed that the stir region exhibited uniformly dispersed and fragmented precipitates and finely recrystallized ultrafine grains. The hardness and strength were reduced, and ductility was enhanced after FSP due to high thermal cycling. Fatigue testing demonstrated a significant increase in fatigue life and reduced fatigue crack growth rate attributable to the combined effects of precipitation and grain refinement during cooling-assisted FSP. SEM examination of fatigue fracture surfaces revealed dimples indicative of ductile failure in the rapid crack propagation zone, while the steady-state propagation region displayed striation markings and secondary fractures.
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The Journal of Materials: Design and Applications covers the usage and design of materials for application in an engineering context. The materials covered include metals, ceramics, and composites, as well as engineering polymers.
"The Journal of Materials Design and Applications is dedicated to publishing papers of the highest quality, in a timely fashion, covering a variety of important areas in materials technology. The Journal''s publishers have a wealth of publishing expertise and ensure that authors are given exemplary service. Every attention is given to publishing the papers as quickly as possible. The Journal has an excellent international reputation, with a corresponding international Editorial Board from a large number of different materials areas and disciplines advising the Editor." Professor Bill Banks - University of Strathclyde, UK
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