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sound-emission measurement

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Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006758
EISBN: 978-1-62708-295-2
... focal point can be used in these cases to obtain highly accurate and high-resolution UT measurements when compared to traditional UT probes. Acoustic emission testing is a UT method that can be used to determine the location and characteristics of an audible sound introduced into a component...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001757
EISBN: 978-1-62708-241-9
... steel fatigue cracking microhardness testing hardness STS403 martensitic stainless steel Introduction The compressor blade on J79 engine has been investigated to determine the cause of failure. The vibration and sounds were recognized by the pilot during take off, the RPM dropped 72...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001149
EISBN: 978-1-62708-232-7
... the critical value for the existing fatigue cracks. Fast fractures moving at the speed of sound in the material were heard by the system operators. Linear fracture mechanics is applicable to the elastic stress regions away from the stiffener rings, but not to the plastic stress regions near the rings...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001754
EISBN: 978-1-62708-241-9
... notable in the examination was the evidence confirming spalling, cumulative material transfer, and smearing at the surface, as well as heat distress from frictional heating ( Figs. 8 , 9 ). The core microstructure was consistent with an M50-quenched and tempered martensitic structure with a sound carbide...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006764
EISBN: 978-1-62708-295-2
... Inspection Ultrasonic inspection methods depend on sound waves of very high frequency being transmitted through metal and reflected at any boundary, such as a metal/air boundary at the surface of the metal, or a metal/crack boundary at a discontinuity within the part or component. High-frequency sound...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003524
EISBN: 978-1-62708-180-1
... parts or other porous materials. Ultrasonic Inspection Ultrasonic inspection methods depend on sound waves of very high frequency being transmitted through metal and reflected at any boundary such as a metal/air boundary at the surface of the metal, or a metal/crack boundary at a discontinuity...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006808
EISBN: 978-1-62708-329-4
... of the weld image. Ultrasonic Testing In ultrasonic testing, a beam of ultrasonic energy (i.e., nonaudible sound) is directed into a specimen, and either the energy transmitted through the specimen is measured or the energy reflected from interfaces is indicated (see the article “ Fundamentals...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003525
EISBN: 978-1-62708-180-1
.... Considerations in the Selection and Use of Test Methods Through the application of analytical testing and a systematic engineering approach, it is possible to successfully ascertain the nature and cause of a plastic component failure. The testing, however, must be performed in a sound manner...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006837
EISBN: 978-1-62708-329-4
... interface reveals a pronounced network of surface cracking due to rolling-contact fatigue, that is, shelling. The shelled surface attenuates the ultrasonic sound, thus preventing a good reflection. In addition, the analyst is frequently required to decide if the failure was then also causative...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006812
EISBN: 978-1-62708-329-4
... practices should also be considered. Simple matters such as specifying and verifying the proper material and material condition are critical. One company has used portable optical emission spectroscopy equipment for chemical analysis to examine several bulk items supposedly made of alloy steels and found 1...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003507
EISBN: 978-1-62708-180-1
..., extrusion, straightening, sizing, etc.). These metalworking operations have a two-fold purpose. First, they are obviously designed to produce parts with the desired configuration. Secondly, metalworking can develop a final shape with internal soundness and improved mechanical properties by: Improved...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006834
EISBN: 978-1-62708-329-4
... denoted as “C,” for clearance). The accuracy classes “P” and clearance classes “C” are defined within the corresponding standard ( Table 1 ). Useful accuracy and clearance standards and how they can be measured Table 1 Useful accuracy and clearance standards and how they can be measured...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006825
EISBN: 978-1-62708-329-4
... be used to detect cracks, pores, flakes, shrinkage cavities, laminations, and other similar discontinuities that produce reflective interfaces. X-ray or gamma-ray radiography is used to identify defects in the weld joints as well as to assess the overall soundness of the component/part. Mechanical...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.9781627083294
EISBN: 978-1-62708-329-4
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003553
EISBN: 978-1-62708-180-1
... explains the SCC, which occurs due to welding, metalworking process, and stress concentration, including options for investigation and corrective measures. It describes the sources of stresses in service and the effect of composition and metal structure on the susceptibility of SCC. The article provides...