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| QUANTITATIVE DETERMINATION OF MECHANICAL PROPERTIES FOR CAVITATION CORROSION SURFACE LAYER OF METAL BY MICRO/NANO MECHANICS MEASUREMENT TECHNOLOGY |
| YONG Xingyue, JI Jing, ZHANG Yaqin, LI Dongliang, ZHANG Zhanjia |
| Beijing University of Chemical Technology, Beijing 100029 |
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Abstract The microhardness of the cross section of metal surface layer and the nano-mechanical properties of cavitation corrosion surface layer for austenitic stainless steel after cavitation corrosion test were quantitatively determined by micro/nano mechanics measurement technology on the base of researches on the cavitation corrosion of austenitic stainless steel. The nano-mechanical parameters of cavitation corrosion surface layer and their changes with displacement into surface including in the relation between the degradation of nano-mechanical properties of cavitation corrosion surface layer and cavitation corrosion were studied. It was found that the surface layer of austenitic stainless steel was composed of cavitation corrosion surface layer with smaller hardness, hardening layer with higher hardness and metal substrate under cavitation corrosion. The degradation of nano-mechanical properties for cavitation corrosion surface layer was induced by the interaction between cavitation and corrosion of media，resulting in serious cavitation corrosion of austenitic stainless steel. There was a critical value for the degradation of nano-mechanical properties of cavitation corrosion surface layer, below which austenitic stainless steel was seriously subjected to cavitation corrosion. And that nanohardness played a dominating role during cavitation corrosion of austenitic stainless steel. The ratio of nano-hardness to nano- elastic modulus (H/E) of cavitation corrosion surface layer is a dimensionless function, which can be used for comprehensively measuring degradation degree of cavitation corrosion surface layer of metal and for studying the relation between the degradation of nano-mechanical properties of cavitation corrosion surface layer and the mean depth of cavitation corrosion penetration of metals.
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Received: 10 April 2010
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Corresponding Authors:
YONG Xingyue
E-mail: yongxy@mail.buct.edu.cn
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Cite this article:
YONG Xingyue, JI Jing, ZHANG Yaqin, LI Dongliang, ZHANG Zhanjia. QUANTITATIVE DETERMINATION OF MECHANICAL PROPERTIES FOR CAVITATION CORROSION SURFACE LAYER OF METAL BY MICRO/NANO MECHANICS MEASUREMENT TECHNOLOGY. J Chin Soc Corr Pro, 2011, 31(1): 40-45.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2011/V31/I1/40
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