预制裂纹304SS试样慢拉伸过程EN和SKP表征

赵茹; 宋诗哲

doi:10.61558/2993-074X.1969

电化学 >

2009 , Vol. 15 >Issue 2: 141 - 145

DOI: https://doi.org/10.61558/2993-074X.1969

研究论文

预制裂纹304SS试样慢拉伸过程EN和SKP表征

赵茹 ,
宋诗哲

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天津大学材料科学与工程学院;金属腐蚀与防护国家重点实验室;国家海洋局天津海水淡化与综合利用研究所;

收稿日期: 2009-05-28

修回日期: 2009-05-28

网络出版日期: 2009-05-28

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The Characteristic on Propagation of Fatigue Pre-cracking 304SS during SSRT with EN and SKP

ZHAO Ru ,
SONG Shi-zhe

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(1.School of Materials Sciences and Engineering,Tianjin University,Tianjin 300072,China;2.State Key Laboratory for Corrosion and Protection,Institute of Metal Research,The Chinese Academy of Sciences,Shenyang 110016,China;3.The Institute ofSeawater Desalination and Multipurpose Utilization,SOA Tianjin,Tianjin 300192,China

Received date: 2009-05-28

Revised date: 2009-05-28

Online published: 2009-05-28

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摘要

应用电化学噪声技术(EN)研究了慢应变速率拉伸(SSRT)条件下预制疲劳裂纹的304SS试样在4mol/LNaCl+0.01 mol/LNa2S2O3溶液中的腐蚀行为,EN的时域与频域谱图显示实验后裂纹发生了扩展.扫描Kelvin探针(SKP)分析也证实了裂纹试样经慢拉伸实验后裂纹出现扩展.

关键词： 电化学噪声; Kelvin探针; 预制疲劳裂纹; 304不锈钢; 应力腐蚀

本文引用格式

赵茹 , 宋诗哲 . 预制裂纹304SS试样慢拉伸过程EN和SKP表征[J]. 电化学, 2009 , 15(2) : 141 -145 . DOI: 10.61558/2993-074X.1969

Abstract

This work focuses on the characteristic of electrochemical noise obtaining from 304SS with fatigue pre-cracking 1.002 mm in 4 mol/L NaCl +0.01mol/L Na2S2O3 solutions during SSRT,with time and frequency domain analysis showed the cracking propagated,which was also confirmed by the morphology observations.Moreover,the characteristics of surface morphology image and Volta potential distribution over the surface have been studied before and after the experiments with Kelvin probe.Both the Kelvin and EN can get the same judgment that the cracking propagated after the experiments.

Key words： electrochemical noise; Kelvin probe; fatigue pre-cracking; stainless steel; SCC

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