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An image analysis study of pit formation on Ti–6Al–4V

2002; Elsevier BV; Volume: 341; Issue: 1-2 Linguagem: Inglês

10.1016/s0921-5093(02)00218-6

1873-4936

Eduardo Norberto Codaro, Roberto Zenhei Nakazato, Ana Horovistiz, L. M. F. Ribeiro, Rosinei Batista Ribeiro, Luís Rogério de Oliveira Hein,

Corrosion Behavior and Inhibition

Metallographic techniques and digital image processing have been used to investigate heat-treated Ti–6Al–4V pitting corrosion, often used as aircraft components. LM and SEM metallography of 'as received', annealed (heating up to 800 °C/30 min and cooling furnace) and aged (heating up to 900 °C/30 min, quenching in water, heating up to 540 °C/240 min and again water-quenched) microstructures reveal pitting sites at primary and secondary α/β interfaces. Microstructural arrangements influence and corrosive environment association on pit morphology could be demonstrated by digital image analysis and results statistical treatment.