Navegando por Palavras-chave "Corrosion Resistance, Aluminum Alloy Alloy 7075-T651, Plasma Nitrated"

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    Avaliação Do Comportamento Mecânico E Da Resistência À Corrosão Da Liga De Alumínio 7075-T651 Nitretada A Plasma
    (Universidade Federal de São Paulo (UNIFESP), 2018-02-28) Rocha, Leticia Oliveira [UNIFESP]; Reis, Danieli Aparecida Pereira [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    Studies About Plasma Nitriding And Fatigue Life Of 7075-T651 Aluminum Alloy After Plasma Nitriding Are Rare In The Literature And They Are Useful For Various Applications, Especially For The Aircraft Sector. The Objective Of This Work Was To Evaluate The Mechanical Behavior And Corrosion Resistance Of Plasma Nitrided 7075-T651 Alloy. Plasma Nitriding Was Performed Using A Pulsed Dc Source In A Temperature Of 350°C Using The Ratio Of 4:1 Between Nitrogen And Hydrogen Gases For 4 Hours. The Characterization Of The Material After Nitring Was Made Through X-Ray Diffraction, Hardness, Optical Profilometry, Microscopy And Corrosion And Tribocorrosion Analyses. It Was Used 27 Proof Bodies (11 Nitrided And 16 Without Nitriding) For S-N Curves Determination, Using For Each Applied Stress Level (150-500 Mpa) At Least 2 Tests. The High Cycle Fatigue Tests Were Conducted In Traction Conditions (R = 0,1), With Constant Amplitude Load. A Layer Of Approximately 2.1 "M Was Obtained On The Alloy Surface By The Plasma Nitridin