著作(論文等)

Basic information

Name YOSHIMURA Toshihiko

論文名

Development of processing technology using extremely high concentration cavitation energy by strong magnetic field

著者名

Toshihiko Yoshimura, Shunta Watanabe, Masataka Ijiri, Satoshi Ota

掲載誌名等

Results in Materials

掲載年月

2022-05

14

100289

開始頁

1

 

ENG

終了頁

11

出版者(日本語)

 

出版者(英語)

Elsevier

発表形態

Research paper

概要

This work demonstrates a new processing technology termed magnetic energy intensive multifunction cavitation (MEI-MFC). In this technique, a strong magnetic field is used to concentrate the bubble energy while ultrasonic waves are applied from the perimeter of a water-jet cavitation jet. The cavitation bubbles are expanded while generating a swirling flow that increases the temperature and pressure of the bubbles. In addition, the presence of a strong magnetic field at the nozzle outlet and the collisions of charged bubbles induced by the Lorentz force cause a significant increase in the number of bubbles and the energy density. This enhanced cavitation processing technology can be applied to various materials to improve strength and to induce functionalization. The peening of austenitic stainless steel using this technique provides a highly corrosion-resistant surface while suppressing the formation of martensite and preventing sensitization by generating a new surface microstructure with a toughened layer directly underneath.