Título

ANALYSIS OF PITTING CORROSION ON AN INCONEL 718 ALLOY SUBMITTED TO HEAT TREATMENTS

ANALYSIS OF PITTING CORROSION ON AN INCONEL 718 ALLOY SUBMITTED TO HEAT TREATMENTS

Autoria

Caliari, Felipe Rocha; Rosa, Elias Felipe da; Silva, Maria Auxiliadora da; Reis, Danieli Aparecida Pereira; Neto, Carlos de Moura

DOI

10.5151/2594-5327-23298

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Resumo

Inconel 718 is one of the most important superalloys, and it is mainly used in the aerospace field on account of its high mechanical strength, good resistance to fatigue and creep, good corrosion resistance and ability to operate continuously at elevated temperatures. In this work the resistance to pitting corrosion of a superalloy, Inconel 718, is analyzed before and after the double aging heat treatments. The used heat treatment increases the creep resistance of the alloy, which usually is used up to 0.6 Tm. Samples were subjected to pitting corrosion tests in chloride-containing aqueous solution, according to ASTM-F746-04. The results of these trials show that after heat treatment the superalloy presents lower values of pitting potential.

 

Inconel 718 is one of the most important superalloys, and it is mainly used in the aerospace field on account of its high mechanical strength, good resistance to fatigue and creep, good corrosion resistance and ability to operate continuously at elevated temperatures. In this work the resistance to pitting corrosion of a superalloy, Inconel 718, is analyzed before and after the double aging heat treatments. The used heat treatment increases the creep resistance of the alloy, which usually is used up to 0.6 Tm. Samples were subjected to pitting corrosion tests in chloride-containing aqueous solution, according to ASTM-F746-04. The results of these trials show that after heat treatment the superalloy presents lower values of pitting potential.

Palavras-chave

Double aging; Pitting corrosion; Inconel 718.

Double aging; Pitting corrosion; Inconel 718.