Nondestructive Characterization of Materials IIJean F. Bussière The possibility of nondestructively characterizing the microstruc ture, morphology or mechanical properties of materials is certainly a fascinating subject. In principle, such techniques can be used at all stages of a material's life - from the early stages of processing, to the end of a structural component's useful life. Interest in the subject thus arises not only from a purely scientific point of view but is also strongly motivated by economic pressures to improve productivity and quality in manufacturing, to insure the reliability and extend the life of existing structures. The present volume represents the edited papers presented at the Second International Symposium on the Nondestructive Characterization of Materials, held in Montreal, Canada, July 21-23, 1986. The Proceedings are divided into eight sections, which reflect the multidisciplinary nature of characterizing materials nondestructively: Polymers and Composites, Ceramics and Powder Metallurgy, Metals, Layered Structures/Adhesive Bonds/Welding, Degradation/Aging, Texture/ Anisotropy, Stress, and New Techniques. Invited papers by R. Hadcock of Grumman Aircraft Systems, R. Cannon of Rutgers University, H. Yada of Nippon Steel and R. Bridenbaugh of Alcoa review respectively the processing of polymer matrix composites, ceramics, steel and aluminum, emphasizing the need for material property sensors to improve process and quality control. Two other invited papers, one by A. Wedgwood of Harwell and the other by P. Holler of the IzFP in Saarbrucken review state of the art techniques to characterize particulate matter and metals respectively. |
Contents
Process Controls and Nondestructive Evaluation | 1 |
InProcess Ultrasonic Nondestructive Evaluation | 19 |
Nondestructive Characterization of Kevlar | 29 |
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acoustic adhesive alloys aluminum amplitude analysis annealing application austenite backscatter bainite Barkhausen noise binder calculated ceramic changes characterization coil components composite composite materials correlation creep cure curve deformation density depth detection determined diameter dislocation eddy current effect elastic energy epoxy evaluation experimental ferrite fiber Figure flaws fracture fracture toughness free induction decay frequency function grain hardening hardness heat increase inspection interface internal friction Kevlar Lamb waves laminate load longitudinal wave magnetic martensite matrix measurements mechanical properties metal method microstructure modulus monitoring nondestructive Nondestructive Testing obtained parameters particle peak phase Phys plastic polymers porosity powder prepreg probe relaxation resin sample scattering sensors shear shown in Fig shows signal sintered specimen steel strain strength stress structure surface techniques temperature tensile thermal thickness tion transducer transformation ultrasonic ultrasonic attenuation ultrasonic velocity ultrasonic waves values wave speeds weld X-ray yield strength