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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0048630
EISBN: 978-1-62708-217-4
...-load test was specified for a sample quantity of bolts from each lot. Electroplating Hydrogen embrittlement Cadmium-plated steel Surface treatment related failures Hydrogen damage and embrittlement Two clevis-head self-retaining bolts used in the throttle-control linkage of a naval...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001812
EISBN: 978-1-62708-241-9
... cadmium-plated notched bars tested in three-point bending at 350 °C did fail by LME, presumably because the electroplating conditions in this case were such that wetting did occur when the cadmium melted. The failed screw was therefore probably plated under conditions enabling wetting during the post...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001404
EISBN: 978-1-62708-220-4
... predominantly of the transgranular type as depicted in Fig. 2 . Fig. 2 Mode of cracking × 500 A spectrographic analysis carried out on the surface of the sample showed that the steel was of the stabilised austenitic type containing molybdenum, i.e. a type resistant to “weld-decay” without post...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001776
EISBN: 978-1-62708-241-9
... then tested for impact strength. Microstructural and Macrostructural Analyses The remaining three samples and the sample that was solution treated were cut, cleaned with ethanol, and blow-dried in warn air. The samples were ground, polished, and etched using 2% Nital as etchant and 15% HCl as re...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001328
EISBN: 978-1-62708-215-0
.... The intent was to provide a clean test surface without inducing any deformation which might affect detectability. Solvent-based visible dye penetrant was utilized. Metallography Microstructual Analysis In general, precipitates were observed in significantly varying distributions and morphologies...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001593
EISBN: 978-1-62708-234-1
... cycles. The fluid passing through the flow sensor had ranged from 40 to 200 °F (4 to 93 °C). Cleaning agents, including chlorine-based and acid-based chemicals, had also been put through the sensor. In addition to the failed part, a typical sample of molding resin was also received for comparison...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001718
EISBN: 978-1-62708-220-4
... zirconium impellers were submitted to IMR Test Labs (a division of Ithaca Materials Research) for post-service materials analysis. Both impellers were utilized in chemical industry circulation pump applications in the Mid-East. Analysis of the aqueous acidic pumpage reveals 50 g/L HCl, 3 g/L MgCl 2 , 3 g/L...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001837
EISBN: 978-1-62708-241-9
.... Although no cracks were found when the welds were visually inspected, X-ray radiography showed small discontinuous surface cracks adjacent to the weld bead in the heat affected zone. Further investigation, including optical microscopy, microhardness testing, and residual stress measurements, revealed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001647
EISBN: 978-1-62708-235-8
... for potential correlations between test conditions and weld porosity. Internal gas analysis was performed using a gas chromatograph and a residual gas analyzer. Samples were taken before, during, and after welding. No significant amounts of contaminant gases were detected in any of the tests, including...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001702
EISBN: 978-1-62708-219-8
.... , Pickering H.W. , Sehgal A. , Osseo-Asare K. , and Cady P.D. , “Electrochemical Measurements on Concrete Bridges for Evaluation of Reinforcement Corrosion Rates,” Corrosion, 49 ( 7 ), 601 – 613 , ( 1993 ). 10.5006/1.3316091 16. AASHTO T 260-94, “Sampling and Testing for Chloride...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001832
EISBN: 978-1-62708-241-9
... pipe across the tank from the inlet. The vapor then passes through a demister, a condenser, and a steam reheater. All vapors exhaust through an outlet HEPA filter, manual damper, and ventilation fan. A sample of the exhaust vapor is normally taken by a continuous air monitor (CAM) or by a portable air...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001379
EISBN: 978-1-62708-215-0
... inventory and the field were tested by magnetic particle inspection. One inventory bolt failed because of a transverse crack near the head-to-shank radius. It was deduced that either a 100% magnetic particle inspection had not been conducted during bolt manufacturing, or the crack went undetected during...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001708
EISBN: 978-1-62708-217-4
... examination two areas of the portside propeller and one area of the starboardside propeller were marked for cutting out samples for subsequent laboratory evaluation. One of the samples contained the full length of the fracture in the broken blade. The second piece was also removed from the portside propeller...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001768
EISBN: 978-1-62708-241-9
... testing, Charpy impact testing, and microscopic analysis. The samples taken from heel and edge of the plate are termed as sample# 1 and 2, respectively. Chemical analysis of a 30 mm × 30mm sample block was carried out in a Brukers’s make Optical Emission Spectrometer. A number of spots were analyzed...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001805
EISBN: 978-1-62708-241-9
... Society of Testing and Materials (ASTM) B 571, Standard Practice for Qualitative Adhesion Testing of Metallic Coatings . Exemplar “good” samples as well as delaminated samples were tested: neither passed ASTM B571. Fig. 6 Cross-section showing electroless nickel coating delamination and cracking...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003509
EISBN: 978-1-62708-180-1
...Abstract Abstract This article briefly reviews the general causes of weldment failures, which may arise from rejection after inspection or failure to pass mechanical testing as well as loss of function in service. It focuses on the general discontinuities observed in welds, and shows how some...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001717
EISBN: 978-1-62708-217-4
... and longitudinal sample were polished then etched with Marble's reagent (4 grams CuSO 4 , 20 ml HCl, and 20 ml deionized water). The structure was similar in both orientations, and was typical of a maraging steel, consisting of an aged, low-carbon martensite. In addition, the material was fairly clean, exhibiting...
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
.... However, one potential difference between a general failure and a failure related to corrosion is the need with the latter for immediate preservation and protection of all evidence. Corrosion failure can also require sampling and testing of corrosion products immediately, such as in the case for MIC...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003500
EISBN: 978-1-62708-180-1
... alignment Imbalance Inadequate bearing contact Inadequate testing Preparation for shipment Oil system not clean Inadequate drainage Protective coating not applied Wrong coating used Equipment not cleaned Protection Insufficient protection Corrosion by salt Corrosion by rain or humidity Poor packaging...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006788
EISBN: 978-1-62708-295-2
..., copper-copper sulfate reference electrode. Source: Ref 30 Indicator minerals found as corrosion products in external corrosion scenarios under disbonded polyethylene tape wrap coating on buried pipelines and in laboratory soil box tests Table 3 Indicator minerals found as corrosion products...