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2012•Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and AtomsRequires access

Effect of Chloride and Oxygen on Stress Corrosion Cracking of 304N in High Temperature Water

Pingzhu Zhang

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Abstract

The stress corrosion cracking(SCC) behavior and mechanism of solution-treated 304N stainless steel in high temperature water were studied by slow strain rate tensile test(SSRT) and fracture surface analysis.The results show that the SCC beha-vior of 304N in high temperature water reveals as transgranular cracking,and with the increasing of Cl-content,the susceptibility of SCC increases.The specimen shows brittle fracture mode when it is exposed to high temperature aerated water containing 50 mg/L Cl-.The present results also indicate that the susceptibility of chloride induced-SCC decreases significantly with decreasing of dissolved oxygen(DO) content in water,which reveals that DO plays a significant role in promoting SCC of 304N in high temperature water.

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What this paper is about

The stress corrosion cracking(SCC) behavior and mechanism of solution-treated 304N stainless steel in high temperature water were studied by slow strain rate tensile test(SSRT) and fracture surface analysis.The results show that the SCC beha-vior of 304N in high temperature water reveals as transgranular cracking,and with the increasing of Cl-content,the susceptibility of SCC increases.The specimen shows brittle fracture mode when it is exposed to high temperature aerated water containing 50 mg/L Cl-.The present results also indicate that the susceptibility of chloride induced-SCC decreases significantly with decreasing of dissolved oxygen(DO) content in water,which reveals that DO plays a significant role in promoting SCC of 304N in high temperature water.

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Available abstract

The stress corrosion cracking(SCC) behavior and mechanism of solution-treated 304N stainless steel in high temperature water were studied by slow strain rate tensile test(SSRT) and fracture surface analysis.The results show that the SCC beha-vior of 304N in high temperature water reveals as transgranular cracking,and with the increasing of Cl-content,the susceptibility of SCC increases.The specimen shows brittle fracture mode when it is exposed to high temperature aerated water containing 50 mg/L Cl-.The present results also indicate that the susceptibility of chloride induced-SCC decreases significantly with decreasing of dissolved oxygen(DO) content in water,which reveals that DO plays a significant role in promoting SCC of 304N in high temperature water.

Key concepts: Stress corrosion cracking, Cracking, Materials science, Chloride, Oxygen, Metallurgy, Corrosion, Slow strain rate testing

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Effect of Chloride and Oxygen on Stress Corrosion Cracking of 304N in High Temperature Water — Research Paper | ScholarLens