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首页> 外文期刊>Journal of Materials Engineering and Performance >Stress Corrosion Cracking of 2205 Duplex Stainless Steel with Simulated Welding Microstructures in Simulated Sea Environment at Different Depths
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Stress Corrosion Cracking of 2205 Duplex Stainless Steel with Simulated Welding Microstructures in Simulated Sea Environment at Different Depths

机译：2205双相不锈钢对不同深度模拟海洋环境中模拟焊接微观结构的应力腐蚀开裂

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摘要

The stress corrosion cracking (SCC) of 2205 duplex stainless steels (DSSs) with different microstructures in simulated sea environments were studied by electrochemical measurements, electron backscattered diffraction and slow strain rate tensile tests. Heat treatments were used to obtain different microstructures. The DSSs were held at 1350 and 850 degrees C for 30 min and then quenched in the water. The results showed that the DSSs had a higher SCC susceptibility in simulated shallow sea environment than in the simulated deep-sea environment. Electrochemical mechanism of the SCC process was controlled by environment factors (temperature, hydrostatic pressure and dissolved oxygen content). The mechanisms of SCC changed from anodic dissolution in the simulated shallow sea environment to hydrogen embrittlement in the simulated deep-sea environment. Moreover, the quenched DSSs, especially the steel held at 850 degrees C, were more vulnerable to SCC than as-received steel in the simulated sea environment due to the deterioration of the microstructure.
机译：通过电化学测量研究了模拟海洋环境中具有不同微结构的2205双相不锈钢（DSSS）的应力腐蚀裂纹（DSS），电子反向散射衍射和慢菌速率拉伸试验。使用热处理来获得不同的微观结构。 DSSS在1350和850℃下保持30分钟，然后在水中淬火。结果表明，DSSS在模拟浅海环境中具有比模拟的深海环境更高的SCC易感性。 SCC过程的电化学机理由环境因子（温度，静压压力和溶解氧含量）控制。 SCC改变了模拟浅海环境中阳极溶解的机制，在模拟深海环境中氢脆。此外，由于微观结构的劣化，淬火的DSS，特别是在850℃下保持的钢，比在850℃下保持的钢更容易受到模拟海洋环境中的钢板。

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