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electrical conductivity

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047935
EISBN: 978-1-62708-225-9
... was suspected to have caused the electric discharge by accumulation and discharge of static charge. The electrical resistance between the rotor and the motor frame lubricated with electrically conductive grease and the grease used in the current case was measured and compared to confirm the fact the currently...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0046535
EISBN: 978-1-62708-234-1
... depression in the backfill revealed the site of failure. Analysis (visual inspection, electrical conductivity, and soil analysis) supported the conclusions that the failure had resulted from galvanic corrosion at a point where the corrosivity of the soil was substantially greater than the average, resulting...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0046512
EISBN: 978-1-62708-234-1
... actuators had been nickel plated. During assembly of the actuators a lubricant containing molybdenum disulfide had been applied to the gaskets as a sealant. The vellum gasket was found to be electrically conductive, and analysis (visual inspection, 500x unetched micrographs, galvanic action testing, and x...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047076
EISBN: 978-1-62708-217-4
..., 0.2x/2x/2.3x electron microscope fractographs, hardness testing, and electrical conductivity testing) supported the conclusions that the failure was caused by fatigue cracks originating on the inside curved surface of the flanges. The cracks had initiated in surface defects caused by either corrosion...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0046146
EISBN: 978-1-62708-217-4
.... Sectioning and 2x metallographic analysis showed small fatigue-type cracks in the hole adjacent to the origin of primary fracture. Hardness and electrical conductivity were typical for aluminum alloy 7075. This evidence supported the conclusion that the arm failed in fatigue cracking that initiated on each...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001815
EISBN: 978-1-62708-241-9
...Abstract Abstract Copper electrical feedthrough pins used in a bolting application in a refrigeration compressor had functioned without failure for years of production and thousands of units. When some of the pins began to fail, an investigation was conducted to determine the cause. Visual...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001387
EISBN: 978-1-62708-215-0
... the steel top plate material. The presence of highly electrically conducting powder in substantial quantities at the bottom of a good cell must have shorted the electrodes, thus disrupting the electrolytic process. The passage of high current through a narrow cross section might have led to melting...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0047199
EISBN: 978-1-62708-234-1
... alloy 7075-T6 forgings made from three different materials Table 1 Effect of thermal treatments on properties of aluminum alloy 7075-T6 forgings made from three different materials Thermal treatment Longitudinal strength Electrical conductivity, % IACS Exfoliation rating Yield Tensile...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0006409
EISBN: 978-1-62708-217-4
... was determined to be fluorinated hydrocarbon teflon-type tape. Hardness checks on both connectors showed the large male end connector to be 75 HRB and the small male end connector to be 77 HRB. Electrical conductivity checks on both connectors showed the large male end connector to have a conductivity of 31...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001510
EISBN: 978-1-62708-217-4
... the specified minimum of Rockwell B78. Electrical conductivity measured 39.2% IACS, within the required range of 35.5–41.5% IACS. Microstructural Analysis Metallographic examination of a chemically etched cross-section cut throughthe origin confirmed the presence of intergranular attack and showed...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001385
EISBN: 978-1-62708-215-0
... as in incident 1. Standards 486B and 486E require that terminals intended for use with aluminum shall be coated to inhibit oxidation and contact with copper. The coating must be electrically conductive. Tin has been found to be acceptable. These standards also prescribe heat cycling tests, tightening torques...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001811
EISBN: 978-1-62708-241-9
... of electromagnetic induction and is sensitive to the electrical conductivity and magnetic permeability of conductive materials. Eddy current evaluation technique can be applied on both conductive and nonconductive materials depending upon their permeability: however; the permeability must not be equal to one...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0091528
EISBN: 978-1-62708-229-7
...: 285 °C (545 °F) Pressure: 7 MPa (1000 psi) pH: 6.5 to 7.5 Chloride content: <0.1 ppm Oxygen content: 0.2 to 0.3 ppm Electrical conductivity: <0.4 mmho/cm Stress: The welding procedure, which employed few passes and high heat input, undoubtedly generated unacceptably high...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047632
EISBN: 978-1-62708-235-8
..., the material was found to be metallurgically satisfactory with a hardness of 69 to 70 HRB, electrical conductivity of 32 to 33% IACS, and a chemical composition conforming to aluminum alloy 2219. There were indications of localized overheating. A review of the production procedures indicated that preheating...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003533
EISBN: 978-1-62708-180-1
... that the sample be electrically conductive to prevent a charge buildup in the sample that affects the incoming primary and emitted secondary electrons, resulting in a poor, distorted image that is constantly changing in contrast and location. The sample should also be dry when placed in the vacuum chamber...
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
... Characterization , Volume 10 of the ASM Handbook , 2019 ( Ref 3 ). A conventional SEM also requires that the sample be electrically conductive to prevent a charge buildup in the sample that affects the incoming primary and emitted secondary electrons. A charge buildup will occur on insulating samples, which...
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
... into the volume of the component. NDE techniques such as eddy current testing (ET) for electrically-conductive materials, full volumetric inspection using ultrasonic testing (UT) for metals, and radiographic testing (RT) are available in these instances. Eddy current testing is typically only able...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0046227
EISBN: 978-1-62708-217-4
... chemical milling and before painting can cause pitting in aluminum alloys. Chemical analyses, measurements of electrical conductivity, and hardness tests all indicated that the aluminum alloy used for the fuel-tank floors conformed to the specifications for 7178-T6. The floors failed by fatigue...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001297
EISBN: 978-1-62708-215-0
... a composition consistent with the specified 2014 aluminum alloy. Hardness tests averaged 84 HRB. The typical hardness of 2014-T652 aluminum is 81 to 90 HRB. The electrical conductivity was also found to be appropriate for the specified material. Crack initiation Mechanical properties 2014-T652...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001020
EISBN: 978-1-62708-214-3
... had been were dirty and discolored. Surface Examination Metallography Chemical Analysis/Identification Mechanical Properties Results of electrical conductivity determinations showed the strut alloy to have a conductivity of 31.3% IACS (International Annealed Copper Standard). Again...