Influence of shot peening on microstructure and electrochemical behavior of al-Cu alloy; [Influence du grenaillage sur la microstructure et le comportement.]
- Title
- Influence of shot peening on microstructure and electrochemical behavior of al-Cu alloy; [Influence du grenaillage sur la microstructure et le comportement.]
- Creator
- Keshavamurthy, R.; Muneer, Shabbir Ahmed Ramanagara; Nirmala Devi, E.; Naga Sai, Ayinala; Ram Prasad, Chitturi; Satyanarayana, M.V.N.V.; Venkata Ramana, V.S.N.
- Description
- The current study explores the effects of shot peening on the microstructural evolution and corrosion behavior of precipitation-hardened Al-Cu alloy. Microstructural analysis revealed significant grain size reduction from 100 m to 6.5 m, and this process improves grain boundary density, reduces precipitate size from 2 m to 0.5 m, and ensures a uniform elemental distribution, effectively mitigating galvanic corrosion risks. Energy-dispersive spectroscopy (EDS) confirms the homogenisation of alloying elements. At the same time, X-ray diffraction (XRD) analysis highlights crystallographic modifications, including refined crystallite size, redistributed secondary phases, and compressive residual stresses, contributing to enhanced strength and fatigue resistance. Corrosion behavior studies reveal a dramatic reduction in weight loss from 0.09 mg to 0.03 mg and a corrosion rate decrease from 3.5 10?3 mpy to 1.5 10?3 mpy, along with a noble shift in corrosion potential from ?1150 mV to ?775 mV. As observed in optical microstructures, grain refinement, residual stress introduction, and uniform surface characteristics lead to a significant shift from severe to mild corrosion attacks. Impedance analysis demonstrated improved corrosion resistance in the shot-peened alloy, evidenced by higher charge transfer resistance (Rct) and lower double-layer capacitance (Cdl). 2025 Canadian Institute of Mining, Metallurgy and Petroleum.
- Source
- Canadian Metallurgical Quarterly;Volume;65;Issue;2;pp.1439-1450
- Date
- 01-01-2026
- Publisher
- Taylor and Francis Ltd.
- Subject
- Al-Cu alloy; Corrosion; Microstructure evolution; Precipitation behavior; Shot peening
- Coverage
- Keshavamurthy R., Department of Mechanical and Automobile Engineering, CHRIST University, Bengaluru, India; Muneer S.A.R., School of Engineering, EDICT Department, Bahrain Polytechnic, Issa Town, Bahrain; Nirmala Devi E., Department of Mechanical Engineering, Godavari Institute of Engineering and Technology, Rajahmundry, India; Naga Sai A., Department of Mechanical Engineering, Aditya University, Surampalem, India; Ram Prasad C., Department of Mechanical Engineering, Aditya University, Surampalem, India; Satyanarayana M.V.N.V., Department of Mechanical Engineering, Anil Neerukonda Institute of Technology and Sciences, Visakhapatnam, India; Venkata Ramana V.S.N., Department of Mechanical Engineering, GITAM (Deemed to be University), Visakhapatnam, India
- Rights
- Restricted Access; Hardcopy may be available in the library
- Relation
- ISSN: 84433; CODEN: CAMQA
- Format
- online
- Language
- English
- Type
- Article
Collection
Citation
Keshavamurthy, R.; Muneer, Shabbir Ahmed Ramanagara; Nirmala Devi, E.; Naga Sai, Ayinala; Ram Prasad, Chitturi; Satyanarayana, M.V.N.V.; Venkata Ramana, V.S.N., “Influence of shot peening on microstructure and electrochemical behavior of al-Cu alloy; [Influence du grenaillage sur la microstructure et le comportement.],” CHRIST (Deemed To Be University) Institutional Repository, accessed June 18, 2026, https://archives.christuniversity.in/items/show/22626.