Development of high performance NDE technique for ferromagnet of three dimensional shape and quantitative evaluation technique of crack shape

2014 Fiscal Year Final Research Report

• Project/Area Number: 24560889
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Material processing/treatments
• Research Institution: The University of Shiga Prefecture
• Principal Investigator: FUKUOKA Katsuhiro 滋賀県立大学, 工学部, 准教授 (40512778)
• Co-Investigator(Renkei-kenkyūsha): TAKAGI Toshiyuki 東北大学, 流体科学研究所, 教授 (20197065) ; KOJIMA Fumio 神戸大学, システム情報科学研究科, 教授 (70234763) ; AIYAMA Hideaki 地方独立行政法人北海道立総合研究機構, 産業技術研究本部, 研究員 (90503003)
• Research Collaborator: HASHIMOTO Mitsuo
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 非破壊検査 / 磁粉探傷試験 / 渦電流探傷試験 / 定量的評価 / 回転磁界

Outline of Final Research Achievements

The technique that inspected the ferromagnet of three dimensional shape in high accuracy was developed. The establishment of a hybrid electromagnetic nondestructive inspection system by the combination of the magnetic particle testing and the eddy current testing was considered. In addition, the technique for quantitatively evaluating the crack shape from flaw detection results was developed.
In this research, the development of the magnetizer that generated a uniform rotating field in the three dimensional space was attempted. The magnetization condition was considered by evaluating the distributions of the rotating magnetic flux density with FEM analysis. The eddy current testing probe that was able to detect a microcrack was developed. The technique for quantitatively evaluating the microcrack from the magnetic-particle pattern in the magnetic-particle testing was considered.

Free Research Field

電磁非破壊検査