Practical Non-destructive Testing


Book Description

This comprehensive book covers the five major NDT methods - liquid penetrants, eddy currents, magnetic particles, radiography and ultrasonics in detail and also considers newer methods such as acoustic emission and thermography and discusses their role in on-line monitoring of plant components. Analytical techniques such as reliability studies and statistical quality control are considered in terms of their ability to reduce inspection costs and limit down time. A useful chapter provides practical guidance on selecting the right method for a given situation.










Non-destructive Testing and Evaluation of Civil Engineering Structures


Book Description

The non-destructive evaluation of civil engineering structures in reinforced concrete is becoming an increasingly important issue in this field of engineering. This book proposes innovative ways to deal with this problem, through the characterization of concrete durability indicators by the use of non-destructive techniques. It presents the description of the various non-destructive techniques and their combination for the evaluation of indicators. The processing of data issued from the combination of NDE methods is also illustrated through examples of data fusion methods. The identification of conversion models linking observables, obtained from non-destructive measurements, to concrete durability indicators, as well as the consideration of different sources of variability in the assessment process, are also described. An analysis of in situ applications is carried out in order to highlight the practical aspects of the methodology. At the end of the book the authors provide a methodological guide detailing the proposed non-destructive evaluation methodology of concrete indicators. - Presents the latest developments performed in the community of NDT on different aspects - Provides a methodology developed in laboratory and transferred onsite for the evaluation of concrete properties which are not usually addressed by NDT methods - Includes the use of data fusion for merging the measurements provided by several NDT methods - Includes examples of current and potential applications




Neutron Radiographic Nondestructive Inspection for Bonded Composite Structures


Book Description

Neutron radiography was found to be effective as a nondestructive inspection technique for detection of bondline voids/defects in a variety of composite structures. Radiographic data are presented in this paper from typical structures for which the neutron radiographic inspection technique offers advantages over more convetional inspection techniques. Complex composite joints such as box beam members, for example, are difficult to inspect by ultrasonic techniques, and the X-ray attenuation coefficients of the different materials in composite/metal combinations differ in such a manner as to yield very little nondestructive inspection (NDI) information regarding the integrity of the bond. Accurate bondline defect information was achieved in such structures utilizing a transportable californium-252(252Cf) neutron radiography system containing approximately 2 mg of the 252Cf isotope. Through techniques developed at Vought Corp. Advanced Technology Center, resolution of simulated bondline voids as small as 0.127 mm (0.005 in.) diameter in laminated graphite/epoxy specimens was achieved. It is expected that continuing improvements in imaging techniques, and in mobility of neutron sources for radiography, will spawn wide usage of the neutron technique for nondestructive inspection of complex wing joints, control surfaces, and other airframe structures.




Neutron Radiography (3)


Book Description

Proceedings of the Third World Conference held in Osaka, Japan, May 14-18, 1989




Summary Report on Neutron Radiography


Book Description

Methods for inspecting by neutron radiography have been demonstrated and are being applied to a wide variety of inspection problems. It seems reasonable to anticipate that the future availability of neutron sources other than nuclear reactors will contribute to much wider application of this technique in industry.




NBS Special Publication


Book Description