The microstructure and stress corrosion cracking behaviour of precipitation-hardened Fe8.7Al29.7Mn1.04C alloy in 20% NaCl solution

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journal

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Original languageEnglish
Pages (from-to)203-211
Journal / PublicationMaterials Science and Engineering
Volume80
Issue number2
Publication statusPublished - Jul 1986
Externally publishedYes

Abstract

The microstructure of Fe8.7Al29.7Mn1.04C alloy (where the composition is given in approximate weight per cent) was examined by transmission electron microscopy (TEM) after various aging treatments. TEM results show that finely ordered K phase carbide particles are precipitated within the austenite grains and grain boundaries after aging at 710 °C for 30 s. These carbide particles have fully developed into a modulated structure after aging at 710°C for 3600 s. Prolonged heat treatment at 710°C for 82.8 ks leads to the decomposition of austenite into ferrite and β-Mn phases at the austenite grain boundaries. The effects of aging treatments on the stress corrosion cracking behaviour of Fe8.7Al29.7Mn1.04C alloy is discussed in this paper. © 1986.