Tensile properties of stainless steels integranularly corroded by CsOH

Tensile tests of the solution treated and 20% cold worked 316 stainless steel intergranularly corroded by the fission product elements. In the load elongation curve of the 20% cold worked specimen, the rupture of the corroded zone was separately observed from the corroded one, whereas the rupture of the corroded zone in one of the solution treated specimens was not distinguished from the rupture of the corroded zone. In the corroded zone of the solution treated specimen, the transverse crack which leads to the rupture took place in the strain range beyond 0.5%. The ultimate tensile strength of the intergranularly corroded zone was measured using the wholly corroded solution treated specimen. The values obtained were 20%-30% of the uncorroded zone in the temperature range from room temperature to 700 deg. C. (author)