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316L不锈钢经表面纳米化(SNC)处理后,表面形成一层纳米层。样品表面晶粒细化至纳米级大约12nm左右,随着深度的增加,晶粒尺寸逐渐增大。该文应用纳米压痕技术分析了纳米层力学性能,结果表明:纳米层的纳米硬度和弹性模量分别为6.05GPa和227GPa,是基体硬度和弹性模量的1.4倍和1.2倍。随距表面距离的增加而降低,并逐步趋近于一个稳定值。同时测得纳米层的应变硬化指数为0.44为基体的1.5倍。
316L stainless steel surface nanocrystallization (SNC) treatment, the surface layer of nano-layer. The sample surface grain refinement to about nanoscale nano-about 12nm, with increasing depth, the grain size increases. The nanoindentation technique was used to analyze the mechanical properties of the nanostructures. The results show that the nano-hardness and elastic modulus of the nanostructures are 6.05GPa and 227GPa, respectively, which are 1.4 times and 1.2 times that of the matrix. With the distance from the surface increases and decreases, and gradually approaching a stable value. At the same time, the strain hardening index of nano-layer was measured to be 0.44 times of the matrix.