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fiber optic sensors

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Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006763
EISBN: 978-1-62708-295-2
... and light-emitting diode panel overhead illumination Some fractures, such as a fatigue fracture, produce a fracture pattern that is best viewed with low angle-of-incidence side lighting. A useful technique for side lighting is the use of an incandescent or LED fiber optic light source. A typical...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003527
EISBN: 978-1-62708-180-1
... the option of lighting from only one side of the failed component, to better reveal fracture surface details. Fiber Optic Lighting Fiber-optic techniques are useful in directing light to a certain location, including cavities and hollow areas, as well as providing a means to emphasize fracture surface...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006782
EISBN: 978-1-62708-295-2
.... Original magnification: 16.9× Fig. 5 Cracking on a bent wire. Original magnification: 52× Fig. 6 Failed (top) and used good (bottom) yellow brass water-temperature sensor units. Original magnification: 3.5× Fig. 7 Discolored (pink) and shiny crystalline appearance of the tip...
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
... of anomalies. Equipment for remote visual examination includes telescopes, borescopes, and fiber-optics cameras. Visual examination of translucent materials uses artificial lighting that can be contained in an illuminator to produce directional lighting. The illuminator provides light of an intensity...
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
... removing the part from an assembly or a structure to document the pristine damage condition of the part before any destructive testing begins, ideally prior to removal or re-location of the part. Visual inspection can include optical magnifiers and light sources to aid in the detection of surface flaws...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006769
EISBN: 978-1-62708-295-2
... the development of SEM technology and operating principles of basic systems of SEM. The basic systems covered include the electron optical column, signal detection and display equipment, and the vacuum system. The processes involved in the preparation of samples for observation using an SEM are described...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003503
EISBN: 978-1-62708-180-1
... in the interconnections between subsystem elements. Cables, plumbing, fiber-optic links, mechanical linkages, and other interconnections between subsystem modules provide the basis for the postulated failure modes. Each type of interconnection has its own set of potential failure modes. The interface fault analysis...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001814
EISBN: 978-1-62708-241-9
... of the shell in the quench chamber wall The gasifier vessel had a fiber optic system mounted on the outer wall of the combustion chamber to monitor its skin temperature and to alarm if the skin temperature exceeded 315 °C. This temperature sensing system, however, was not in service at the time...