Volumetric inspection of moderately thick austenitic stainless steels by multifrequency eddy currents

Journal Article · Thu Jan 01 00:00:00 EST 1981 · J. Nondestr. Eval.; (United States)

DOI:https://doi.org/10.1007/BF00614994· OSTI ID:6579233

Scott, G W; Dodd, C V

This paper describes the initial phase of a project to develop eddy-current methods to inspect welds joining sections of austenitic stainless steel pipe having walls up to 13 mm (0.5 in.) thick. The objective of this phase was to demonstrate the feasibility of detecting and characterizing flaws in austenitic stainless steel base metals. These materials and welds present challenging eddy-current problems because of their relatively large thickness and ferromagnetism. Multiparameter analysis shows that a reflection coil probe operated with three discrete driver frequencies and phase detection can locate and size a cracklike defect in a single conductor in the presence of variations in conductor resistivity, permeability, and thickness and in the probe-conductor spacing (liftoff).

• Research Organization: Oak Ridge National Lab., TN
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6579233
• Journal Information: J. Nondestr. Eval.; (United States), Vol. 2:1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
AUSTENITIC STEELS
WELDED JOINTS
INSPECTION
DEFECTS
DETECTION
EDDY CURRENTS
FEASIBILITY STUDIES
NONDESTRUCTIVE TESTING
USES
ALLOYS
CURRENTS
ELECTRIC CURRENTS
IRON ALLOYS
IRON BASE ALLOYS
JOINTS
MATERIALS TESTING
STEELS
TESTING
360104* - Metals & Alloys- Physical Properties
420500 - Engineering- Materials Testing