Application of on-site positron annihilation lifetime spectroscopy system as non-destructively shot peening evaluation technique

Author:  N. Uesugi1, M. Yamawaki2, K. Hattori1, Y. Watanabe1* 1. Toyo Seiko Co., Ltd., Japan 2 National Institute of Advanced Industrial Science and Technology, Japan
Source:  ICSP14 Milan
Doc ID:  2022058
Year of Publication:  2022
Abstract:  
Positron annihilation lifetime spectroscopy (PALS) is a non-destructively technique to study open-volume lattice defects such as vacancies or dislocations, which is used for fatigue, aging and shot peening inspection. In this work, we developed a portable PALS apparatus that has the ability for on-site measurement. We developed the light-shielding technique which enable us to do on-site measurement. Furthermore, we downsized the apparatus size using Monte Carlo simulation technique. We validated that the developed portable apparatus have the same shot peening potential as the conventional system. We concluded that the developed portable apparatus is sufficiently able to capture the change caused by shotpeening time. Keywords Non-destructive inspection, Positron annihilation analysis, Lattice defects