Effect of machining on oxide development in type 316L stainless steel in high-temperature hydrogenated water
Effect of machining on oxide development in type 316L stainless steel in high-temperature hydrogenated water
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DOI：
10.1016/j.corsci.2021.109444
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发表时间：
2021-04
影响因子：
8.3
通讯作者：
Litao Chang;K. Mukahiwa;L. Volpe;F. Scenini
中科院分区：
文献类型：
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作者：
Litao Chang;K. Mukahiwa;L. Volpe;F. Scenini
本文用辅助分析技术研究了316L不锈钢在高温氢化水中的氧化机理。表面和内部氧化物的微观结构的差异被证明是负责加工表面上的快速氧化。实际上，机械加工促进了一层厚约1.2 μm的超细晶层的形成，与抛光表面相比，其内部氧化物的孔隙率更高，晶粒更细。机械加工表面的快速氧化动力学归因于加速的氧阴离子和金属阳离子通过氧化物孔隙和晶界的扩散。
The oxidation mechanisms of 316 L stainless steel in high-temperature hydrogenated water were investigated on machined and polished surfacesviacomplementary analytical techniques. The differences in microstructure of the surfaces and of the inner oxides were shown to be responsible for the fast oxidation on machined surfaces. In fact, machining promoted the formation of a ∼2 μm thick ultrafine-grained layer which developed a more porous and fine-grained inner oxide than on that formed on polished surface. The faster oxidation kinetics of machined surfaces was attributed to the accelerated oxygen anions and metal cations diffusion through the oxide pores and grain boundaries.