Fabrication of imitative cracks by 3D printing for electromagnetic nondestructive testing and evaluations

Noritaka Yusa, Weixi Chen, Jing Wang, Hidetoshi Hashizume

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

This study demonstrates that 3D printing technology offers a simple, easy, and cost-effective method to fabricate artificial flaws simulating real cracks from the viewpoint of eddy current testing. The method does not attempt to produce a flaw whose morphology mirrors that of a real crack but instead produces a relatively simple artificial flaw. The parameters of this flaw that have dominant effects on eddy current signals can be quantitatively controlled. Three artificial flaws in type 316L austenitic stainless steel plates were fabricated using a powderbed-based laser metal additive manufacturing machine. The three artificial flaws were designed to have the same length, depth, and opening but different branching and electrical contacts between flaw surfaces. The flaws were measured by eddy current testing using an absolute type pancake probe. The signals due to the three flaws clearly differed from each other although the flaws had the same length and depth. These results were supported by subsequent destructive tests and finite element analyses.

Original languageEnglish
Pages (from-to)9-14
Number of pages6
JournalCase Studies in Nondestructive Testing and Evaluation
Volume5
DOIs
Publication statusPublished - 2016 May 1

ASJC Scopus subject areas

  • Computational Mechanics
  • Materials Science (miscellaneous)
  • Safety, Risk, Reliability and Quality
  • Mechanics of Materials

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