Fabrication of imitative stress-corrosion cracks for electromagnetic NDE using synchrotron deep x-ray lithography and powder metallurgy processing

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Publication Details

Author list: Jomdecha C., Cai W., Xie S., Chen Z., Phung-On I., Pattanakul R.

Publisher: IOS Press

Publication year: 2018

Volume number: 43

Start page: 80

End page: 87

Number of pages: 8

ISBN: 9781614998358

ISSN: 1383-7281

eISSN: 1383-7281

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85050549637&doi=10.3233%2f978-1-61499-836-5-80&partnerID=40&md5=d17796f630d1b54d7a11b910080328b2

Languages: English-Great Britain (EN-GB)

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Abstract

This paper presents advanced methods using the deep X-ray lithography (X-ray LIGA) and the powder metallurgy processing to fabricate imitative Stress Corrosion Crack (SCC) for electromagnetic NDE as needed to be a reference specimen. A pattern of the imitative SCC was formed by using X-ray LIGA with controllable shape and size with precise details of SU-8 material. The prepared pattern was then inserted into mixed-stainless steel and Sn powders in a soft mold by using less pressure filling method. Afterward, the specimens were sintered at 1100 ฐC. The results showed that these promising combined techniques can be utilized to fabricate micro sizes of the imitative SCCs. In addition, an inversion scheme was utilized to evaluate the equivalent conductivity of the specimens. The analysis results revealed that they were appropriated for desired equivalent conductivities of actual SCC detection by an eddy current testing. ฉ 2018 The authors and IOS Press.

Keywords

Eddy Current Testing, Imitative SCC, Lithography, Synchrotron