室温下通过超声喷丸在纯钛上获得的纳米晶-非晶混合层。

A nanocrystalline-amorphous mixed layer obtained by ultrasonic shot peening on pure titanium at room temperature.

机构信息

Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan 250061, PR China.

出版信息

Ultrason Sonochem. 2018 Oct;47:68-74. doi: 10.1016/j.ultsonch.2018.04.017. Epub 2018 Apr 27.

DOI:10.1016/j.ultsonch.2018.04.017

PMID:29908608

Abstract

A nanocrystalline-amorphous (NC-A) mixed layer was obtained by ultrasonic shot peening (USP) on pure titanium at room temperature and observed by X-ray diffraction pattern (XRD), scanning electron microscope (SEM) and high-resolution transmission electron microscope (HRTEM). The results showed that the amorphization percentage in the NC-A mixed layer increased continuously with the increase of the peening duration, shot diameter and sonotrode amplitude or the decrease of the peening distance. The maximum amorphization percentage achieved in this study was 44.09%. Moreover, with the amorphization percentage in the NC-A mixed layer increasing, the surface hardness increased constantly. Base on the experimental results, the amorphization mechanism during USP treatment was also analyzed.

摘要

通过在室温下对纯钛进行超声喷丸处理（USP），获得了纳米晶-非晶（NC-A）混合层，并通过 X 射线衍射图（XRD）、扫描电子显微镜（SEM）和高分辨率透射电子显微镜（HRTEM）进行了观察。结果表明，在 NC-A 混合层中，非晶化百分比随着喷丸时间、喷丸直径和声频杆振幅的增加或喷丸距离的减小而连续增加。本研究中达到的最大非晶化百分比为 44.09%。此外，随着 NC-A 混合层中非晶化百分比的增加，表面硬度不断增加。基于实验结果，还分析了 USP 处理过程中的非晶化机制。