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

Journal Article · Wed Dec 31 23:00:00 EST 1980 · 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), Journal Name: J. Nondestr. Eval.; (United States) Vol. 2:1; ISSN JNOED
• Country of Publication: United States
• Language: English

Related Subjects

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