Ultrasonic Methods for Material and Structure Inspection pdf

[...]... new developments in ultrasonic research for material and structure inspection Application areas cover both engineering and biological materials Some of the recent advances in the science and technology of ultrasonic NDE and other areas of research on ultrasonic technology that go beyond the traditional imaging techniques of internal defects are covered in this book New inspection and material characterization... used for microstructure inspection, are influenced by the texture The propagation and scattering of ultrasonic waves in textured polycrystals are discussed in Chapter 6 This is important for material microstructure inspection by ultrasonic waves; – how embedded piezoelectric ultrasonic sensors are used for health monitoring of large plate type structures A rigorous study of the interaction between ultrasonic. .. that the ultrasonic methods that are used or developed for NDE inspections, whether it is in a laboratory setting or in the field or depot, cannot be directly translated into SHM There are issues and challenges involved in 4 Advanced Ultrasonic Methods for Material and Structure Inspection transitioning from NDE to real-time SHM More information on this area is to be found in [JAT 06] While many material. .. mission where crack growth behavior will alter Therefore, the future endeavors in development of sensors for material and damage state awareness must target microstructure parameters that control fatigue crack growth 18 Advanced Ultrasonic Methods for Material and Structure Inspection 1.3.2.5 Corrosion Uniform corrosion mentioned previously is just one form of corrosion (it should be recognized that this... failure mechanisms for the two materials can be completely different A good understanding of different failure mechanisms for various materials is needed for designing efficient SHM systems for different structural components made of various types of material Similarly, it is also important for materials scientists to understand the basic mechanics behind SHM systems for better communication and collaboration... creep is 12 Advanced Ultrasonic Methods for Material and Structure Inspection controlled by dislocation movement and is independent of the grain size, shown as dislocation creep regime in Figure 1.1 Grains here elongate and new textures form Currently, in order to decipher the specific mechanism that is occurring in a component, specimens from the component are sectioned and prepared for scanning or transmission... categories: (I) deformation, (ii) fracture and (iii) material loss An Introduction to Failure Mechanisms and Ultrasonic Inspection 5 1.3.1.1 Deformation A metallic alloy can fail to perform an assigned function due to excessive deformation arising either from inferior yield strength at ambient temperatures or through excessive creep at high temperatures For instance, the improper selection of material of... are being Chapter written by Kumar V JATA, Tribikram KUNDU and Triplicane A PARTHASARATHY 2 Advanced Ultrasonic Methods for Material and Structure Inspection developed and in order to monitor these states it is important to know what damage and material states are being sensed and how the material state change may be progressing Without such knowledge the sensor output generated during flight or during... the mechanics and materials community on SHM-related knowledge and understanding The mechanics community often fails to see the importance of the type of material used when designing an SHM system for a specific structural component or material As an example, the analysis and design-based on Young’s modulus and Poisson’s ratio does not necessarily produce two SHM systems for two different materials because... phases (present in the alloy), stress state conditions at the crack tip, temperature and crack tip strain rate A large body of information on this subject was published between 1973 and 1990 and the reader is referred to the bibliography at the end of chapter 20 Advanced Ultrasonic Methods for Material and Structure Inspection 10-5 Al-Zn-Mg alloys T6 tempers Region II, plateau region, constant velocity . h1" alt="" Advanced Ultrasonic Methods for Material and Structure Inspection This page intentionally left blank Advanced Ultrasonic Methods for Material and Structure Inspection . ultrasonic research for material and structure inspection. Application areas cover both engineering and biological materials. Some of the recent advances in the science and technology of ultrasonic. methodologies for structural damage and material state are being Chapter written by Kumar V. JATA, Tribikram KUNDU and Triplicane A. PARTHASARATHY. 2 Advanced Ultrasonic Methods for Material and Structure