Surface crack detection in welded stainless steel canisters using shear horizontal waves

Sungho Choi, Hwanjeong Cho, Cliff J. Lissenden, Matthew S. Lindsey

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

Ultrasonic inspection methodologies for welded stainless steel canisters in spent nuclear fuel dry storage casks are investigated for detection of stress corrosion cracking (SCC) in the heat affected zone (HAZ) of a weld. Shear horizontal (SH) waves having 3D wave motion, which are actuated and received by periodic permanent magnet electromagnetic acoustic transducers (EMATs), are used to detect cracks perpendicular or parallel to the weld line. Due to the limited accessibility to the welds in the stainless steel canister, three different types of sensor layouts amenable to robotic delivery are proposed that use either through-transmission or pulse-echo sensor configuration. A stainless steel welded plate having artificial surface breaking notches near the weld is inspected to demonstrate the performance of the methods. Two dimensional ultrasonic images showing the notch locations are obtained by scanning a pair of EMATs in the direction parallel to the weld line. The feasibility of detecting cracks normal to, and along, the weld line using pulse-echo mode is demonstrated. Thus, robotically delivered SH-wave EMATs will be effective for inspecting the entirety of the weld lines in the stainless steel canister, even in the presence of guide channels.

Original languageEnglish (US)
Title of host publicationMaterials and Fabrication
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791850435
DOIs
StatePublished - Jan 1 2016
EventASME 2016 Pressure Vessels and Piping Conference, PVP 2016 - Vancouver, Canada
Duration: Jul 17 2016Jul 21 2016

Publication series

NameAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume6B-2016
ISSN (Print)0277-027X

Other

OtherASME 2016 Pressure Vessels and Piping Conference, PVP 2016
CountryCanada
CityVancouver
Period7/17/167/21/16

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

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