Corrosion fatigue crack growth behavior of duplex stainless steels with different nitrogen contents

Chuan Ming Tseng, Horng Yih Liou, Wen Ta Tsai

研究成果: Conference article同行評審

摘要

The effect of nitrogen content on the environmentally-assisted cracking behavior of 22% Cr duplex stainless steel in chloride solutions was investigated. Slow strain rate tests and corrosion fatigue tests employing fracture mechanics specimens were conducted in chloride containing solution. The experimental results show that the strength of 22% Cr duplex stainless steel increases with increasing amount of nitrogen (in the range of 0.1 to 0.2 wt%) in the steel. Slow strain rate testing results indicate that 22% Cr duplex stainless steels with different nitrogen contents are resistant to environmentallyassisted cracking in 3.5 wt% NaCl solution at room temperature, but become susceptible in boiling 45 wt% MgCl2 solution. The experimental results indicate that the fatigue crack growth rates of 22% Cr duplex stainless steels with different nitrogen contents are lower than that of 316L stainless steel in air at 1 Hz. But in the 3.5 wt% NaCl solution, the fatigue crack growth rates in 316L stainless steel and all duplex stainless steels are almost the same. The environmental effect is more prominent for duplex stainless steel than for 316L stainless steel. The results revealed that nitrogen in the range of 0.1 to 0.2 wt% does not affect the FCG rate of 22% Cr duplex stainless steel in air and in 3.5 wt% NaCl solution at 1 Hz.

原文English
期刊NACE - International Corrosion Conference Series
2000-March
出版狀態Published - 2000
事件Corrosion 2000 - Orlando, United States
持續時間: 2000 三月 262000 三月 31

All Science Journal Classification (ASJC) codes

  • 化學 (全部)
  • 化學工程 (全部)
  • 材料科學(全部)

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