Abstract

The presented article is focused on the evaluation of mechanical properties of stainless steel disintegrated using an ultrasonically modulated pulsating water jet. The experimental procedure was performed using a nozzle with a circular orifice with an equivalent diameter of 1.6 mm. The mechanical properties evaluation was based on indentation elasticity modulus E_p and nano hardness H, which were measured using nanoindentation technique. Influence of ultrasonic power and plunger pressure change on disintegrated material was evaluated. Changes in mechanical properties in dependence on distance from the disintegrated surface were evaluated. Elasticity modulus and nano hardness change were observed below and on the sides of the disintegrated surfaces. Measurements were performed until the distance of 930 μm. The indentation was carried in three series of 10 indents with 100 μm spacing located below the affected area, next to the affected area and in the unaffected material. Results of experimental testing show changes of nano hardness (generally an appreciable decrease) and elasticity modulus (limited increase) of material under and to the side of the newly created surface.

中文翻译：

---

脉冲水射流崩解对奥氏体不锈钢AISI 304L硬度和弹性模量的影响

摘要

这篇文章的重点是评估使用超声调制脉冲水射流分解的不锈钢的机械性能。使用具有等效直径为1.6毫米的圆形孔的喷嘴执行实验程序。力学性能评估基于压痕弹性模量E _p和纳米硬度H，使用纳米压痕技术进行测量。评估了超声功率和柱塞压力变化对崩解材料的影响。评估了机械性能随离崩解表面距离的变化。在分解表面的下方和侧面观察到弹性模量和纳米硬度变化。进行测量直到距离为930μm。压痕以三个系列的10个压痕进行，每个压痕的间距为100μm，位于受影响区域的下方，邻近受影响区域以及未受影响的材料中。实验测试的结果表明，在新创建的表面下方和侧面，材料的纳米硬度（通常会明显下降）和弹性模量（有限地增加）会发生变化。