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OALib Journal期刊

ISSN: 2333-9721

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Avalia??o em rela??o à corros?o-fadiga de juntas soldadas da liga Inconel 625
Pfingstag,M. E.; Muller,I. L.; Schaeffer,L.;
Ciência & Tecnologia dos Materiais , 2010,
Abstract: it was studied the fatigue and corrosion fatigue behavior of welded specimens of a nickel base alloy, namely inconel 625. one of the most susceptible regions, to suffer these processes of degradation, since tensions are generated due to welding process, and is attenuated in the presence environment containing harsh elements with chlorine, carbon dioxide, among others. the tests used, in this work, to evaluate these phenomena, were polarization curves, slow strain rate technique, in air and in the presence of corrosive medium and fatigue and corrosion-fatigue tests using an eccentric type machine and an data acquisition system. this alloy shows a good corrosion resistance and a good behavior considering fatigue and corrosion fatigue tests, where even in stress levels higher than the ones used in service conditions, the number of cycles to failure of the specimens surpassed 5 million cycles.
Avalia o em rela o à corros o-fadiga de juntas soldadas da liga Inconel 625
M. E. Pfingstag,I. L. Muller,L. Schaeffer
Ciência & Tecnologia dos Materiais , 2010,
Abstract: Estudou-se neste trabalho o comportamento à fadiga e à corros o-fadiga de juntas soldadas da liga Inconel 625. Um dos pontos mais susceptíveis a sofrer esses processos de degrada o é a regi o da solda uma vez que s o geradas tens es residuais trativas evido ao processo de soldagem, e que é acentuada na presen a de meios contendo elementos agressivos como cloretos, gás carb nico, entre outros. Os testes utilizados para avalia o desses fen menos consistiram em curvas de polariza o para caracteriza o do comportamento à corros o, ensaios de tra o ao ar e em presen a do meio corrosivo, ensaios de fadiga e corros o fadiga em máquinas tipo excêntrica, sendo os ensaios foram monitorados com sistema da aquisi o de dados adequado. Esta liga demonstrou uma boa resistência a corros o com um potencial de pite de 0,6 V, e uma boa durabilidade frente a fadiga e corros o-fadiga, resistindo mesmo em tens es superiores às de trabalho a mais de 5 milh es de ciclos. It was studied the fatigue and corrosion fatigue behavior of welded specimens of a nickel base alloy, namely Inconel 625. One of the most susceptible regions, to suffer these processes of degradation, since tensions are generated due to welding process, and is attenuated in the presence environment containing harsh elements with chlorine, carbon dioxide, among others. The tests used, in this work, to evaluate these phenomena, were polarization curves, slow strain rate technique, in air and in the presence of corrosive medium and fatigue and corrosion-fatigue tests using an eccentric type machine and an data acquisition system. This alloy shows a good corrosion resistance and a good behavior considering fatigue and corrosion fatigue tests, where even in stress levels higher than the ones used in service conditions, the number of cycles to failure of the specimens surpassed 5 million cycles.
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