Microstructure and intergranular corrosion resistance of UNS S17400 (17-4PH) stainless steel

被引：95

作者：

Tavares, S. S. M. ^{[1
]}

da Silva, F. J. ^{[2
]}

Scandian, C. ^{[2
]}

da Silva, G. F. ^{[1
]}

de Abreu, H. F. G. ^{[3
]}

机构：

[1] Univ Fed Fluminense, Programa Posgrad Engn Mecanica PGMEC, BR-24210240 Niteroi, RJ, Brazil

[2] Univ Fed Espirito Santo, Dept Engn Mecan, BR-29075910 Vitoria, ES, Brazil

[3] Univ Fed Ceara, Dept Met & Mat Engn, BR-60455760 Fortaleza, Ceara, Brazil

来源：

CORROSION SCIENCE | 2010年 / 52卷 / 11期

关键词：

Stainless steel; SEM; XRD; Intergranular corrosion; REACTIVATION TEST; LAVES PHASE; BEHAVIOR;

D O I：

10.1016/j.corsci.2010.07.016

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

UNS S17400 or 17-4PH is a precipitation hardening martensitic stainless steel with many industrial applications. Quite different mechanical properties can be produced in this material by varying the aging temperature. In this work, the influence of aging temperature on the intergranular corrosion susceptibility was evaluated by electrochemical and metallographic tests. The microstructural features were investigated by X-ray diffraction, optical and scanning electron microscopy. Intergranular chromium carbide precipitation occurs in specimens aged at high temperatures, although NbC carbides were also observed. The results obtained by double loop electrochemical potentiodynamic reactivation tests (DL-EPR) show that the susceptibility to intergranular corrosion resistance increases with the increase of aging temperature. Healing due to Cr diffusion in the 600-650 degrees C range was not observed by DL-EPR tests. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：3835 / 3839

页数：5

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