Abstract—

The nano- and micro-indentation mechanical parameters of the AISI 316L stainless steel, such as nanohardness (Н_NI), microhardness (H_MI), the Young modulus (E), the indices of plasticity (H/E) and resistance (H³/E²), and relaxation parameters h_s, h_res, h_e-p and their dependences on the value of P load applied to an indenter were studied. Hardness is shown to be slightly decreased in the microindentation interval (Р = 100–500 mN) with an increase in the load, whereas it grows substantially with P decrease in the region of nanoindentation (Р < 100 mN) to exhibit the Indentation Size Effect. The major peculiarities of the deformation process were established resulting from the study of the indenter penetration character. The presence of various mechanisms of the plastic deformation is supported during the indentation of AISI 316L steel (intragranular, intergranular, and rotational), and a physical interpretation of the observed patterns is offered. The results obtained are of great importance for practice, since the compound AISI 316L belongs to medical steels being used as implants in stomatology, bone impregnation, and biotechnology.

中文翻译：

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AISI 316L钢的纳米和微机械参数

摘要—

的AISI 316L不锈钢的纳米和微米压痕机械参数，诸如纳米硬度（Н _NI），显微硬度（ħ _MI），杨氏模量（ë），塑性（的索引ħ / ë）和电阻（ħ ³ / E ²），并研究了松弛参数h _s，h _res，h _e-p及其对压头施加的P负荷值的依赖性。硬度在微压痕间隔中有所降低（Р= 100–500 mN），随着载荷的增加，纳米压痕区域（Р <100 mN）中的P减小，则其显着增加，从而表现出压痕尺寸效应。通过对压头穿透特性的研究，确定了变形过程的主要特点。在AISI 316L钢的压痕过程中（晶内，晶间和旋转）可以支持各种塑性变形机制的存在，并且可以对观察到的模式进行物理解释。由于化合物AISI 316L属于医用钢，被用作口腔医学，骨浸渍和生物技术中的植入物，因此所得的结果对实践具有重要意义。