Effect of nitrogen on corrosion behaviour of a novel high nitrogen medium-entropy alloy CrCoNiN manufactured by pressurized metallurgy
作者： Hao Feng , Huabing Li , Xiaolei Wu , Zhouhua Jiang , Si Zhao
DOI: 10.1016/J.JMST.2018.03.021
关键词:
摘要: Abstract A novel high nitrogen medium-entropy alloy CrCoNiN, which had higher strength and slightly lower ductility than CrCoNi alloy, was successfully manufactured by pressurized metallurgy. The microstructure corrosion behaviour were investigated microscopic, electrochemical spectroscopic methods. results indicated that existed in the form of Cr2N precipitates uniformly distributed N atoms, alloying significantly refined grain size. Besides, enriched on outmost surface passive film metal/film interface as ammonia (NH3 H 4 + ) CrN, respectively. significant improvement resistance CrCoNiN attributed to metastable pitting susceptibility together with thicker, less defective more compact film.
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