S0302-1-1 Higher Harmonic Imaging and Sizing of IGSCC in Ni Based Alloy Weld

Abstract

The validity of the higher harmonic imaging technique is demonstrated for detecting and sizing IGSCC in Ni-based alloy weld with buttered region. The IGSCCs in the buttered and welded regions were imaged by the normal or oblique incidence techniques. The depth of the IGSSC estimated by higher harmonic images agrees within 4mm with tat measured by optical microscope..