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Acoustic Emission in Friction


Acoustic Emission in Friction
  • Author : Victor M. Baranov
  • Publisher : Elsevier
  • Release : 2011-07-29
  • ISBN : 0080466273
  • Language : En, Es, Fr & De
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Acoustic Emission in Friction is devoted to acoustic, mainly ultrasonic, emission that occurs in friction of machine components. Its crucial novelty is in systematizing the advances in its use for monitoring technical systems, especially in the important nuclear power industry. Written by four well-known experts from the main nuclear research university in Russia, this book covers the following areas: All the sources of acoustic emission in friction The theory of acoustic emission The effects of surface conditions, load and velocity on acoustic emission The equipment for registration and monitoring of acoustic emission Unique data from acoustic emission control under various testing conditions in friction units of machinery for nuclear industry machinery There is much emphasis on the comparatively new and rapidly developing tribology of nuclear power engineering. Although a substantial part of the experimental data relates to this specific field of engineering, the universality of the method is shown and its application is possible wherever the field inspection of friction units is necessary. Calculation expressions describing main characteristics of AE registered in friction units Describes new set-ups for studying the tribological behaviour of nuclear engineering materials Presents the theory of the acoustic emission method in friction units

Acoustic Emission Internal Friction and Young s Modulus in a Mechanically Fatigued GFRP Composite and MACOR a Glass ceramic Composite


Acoustic Emission  Internal Friction and Young s Modulus in a Mechanically Fatigued GFRP Composite and MACOR  a Glass ceramic Composite
  • Author : Karl Andre Tebeau
  • Publisher :
  • Release : 1991
  • ISBN : MSU:31293009019344
  • Language : En, Es, Fr & De
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Acoustic Emission


Acoustic Emission
  • Author : Wolfgang Sachse
  • Publisher : ASTM International
  • Release : 1991-01-01
  • ISBN : 0803113897
  • Language : En, Es, Fr & De
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Papers presented at the symposium held in Charlotte, NC, March 1989, examine the phenomenon in which elastic or stress waves are emitted from a rapid, localized change of strain energy in a material. The first section focuses on AE sensors and systems. The second deals with fundamental investigation

Investigation of Acoustic Emission and Surface Treatment to Improve Tool Materials and Metal Forming Process


Investigation of Acoustic Emission and Surface Treatment to Improve Tool Materials and Metal Forming Process
  • Author : Deming Cao
  • Publisher :
  • Release : 2010
  • ISBN : OCLC:704699888
  • Language : En, Es, Fr & De
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Silicon nitride and WC-Co cermet tools are used for metal forming processes including extrusion and drawing. These materials are used to make tool dies which are exposed to deformation caused by friction and wear. Surface treatments such as ion implantation, laser blazing and coating have been found to improve surface properties, to optimize tribological behavior between the metal and die, as well as to extend service life of the tool dies. Early detection and continuous monitoring processes by non destructive testing (NDT) methods are needed in order to ensure the functionality of the wear process and extend the tool service life. Acoustic emission is one of the promising NDT methods for this application. The surface treatment chosen for this investigation was ion implantation. Three types of wear resistant materials with and without surface treatment were selected for this project; silicon nitride and two tungsten carbides (6% Cobalt and 10% Cobalt). This investigation was conducted using a pin-on-disk device for wear/friction tests of the selected materials with lubrication and/or without lubrication against both a stainless steel disk and an aluminum disk. The acoustic emissions generated during the experiments were recorded and analyzed. The results of this investigation showed that the ion implantation improved the tribological properties of the materials and reduced acoustic emission and coefficient of friction. A linear relationship between the average amplitude of the acoustic emission and the coefficient of friction of the tested materials was found. The investigation demonstrated that the acoustic emission method could be used to monitor the wear/friction processes.

Acoustic Emission


Acoustic Emission
  • Author : Wojciech Sikorski
  • Publisher : BoD – Books on Demand
  • Release : 2012-03-02
  • ISBN : 9789535100560
  • Language : En, Es, Fr & De
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Acoustic emission (AE) is one of the most important non-destructive testing (NDT) methods for materials, constructions and machines. Acoustic emission is defined as the transient elastic energy that is spontaneously released when materials undergo deformation, fracture, or both. This interdisciplinary book consists of 17 chapters, which widely discuss the most important applications of AE method as machinery and civil structures condition assessment, fatigue and fracture materials research, detection of material defects and deformations, diagnostics of cutting tools and machine cutting process, monitoring of stress and ageing in materials, research, chemical reactions and phase transitions research, and earthquake prediction.