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SEM/EDX analysis

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Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001848
EISBN: 978-1-62708-241-9
... included visual and macroscopic inspection, metallographic and chemical analysis, SEM imaging, optical profilometry, mechanical property testing, and EDX analysis. The die was made of chromium hot-work tool steel and the forgings were made of CuZn39Pb3 heated to an initial working temperature 700 deg C...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001126
EISBN: 978-1-62708-214-3
... metal oxide and covered on the back surfaces with an adherent black polyethylene plastic. Macro fractography, SEM fractography, EDX analysis, and photo elasticimetry were conducted on four of the shattered panels. Small nickel sulfide inclusions were found at the failure origins. Failure of the panels...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c9001573
EISBN: 978-1-62708-226-6
... was the presence of pits located in the uncoated area of the wires. The uncoated area of the wire, is the area where the wire is fixtured in the coating chamber during coating. Examination and analysis of the pits (shown in Figure 1 ) using SEM/EDX detection unit revealed significant peaks of B, O, Zr and Fe...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0045918
EISBN: 978-1-62708-235-8
... of the grain facets. EDX analysis showed they consisted of niobium and fluorine. Plastic replicas, prepared by standard TEM techniques, were analyzed with selected-area electron diffraction, showing a pattern match for niobium tetrafluoride. Auger analyses showed electron spectra containing peaks representing...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001795
EISBN: 978-1-62708-241-9
... it to uneven or eccentric loading. This explains the preferential nature of the flaking on the outer race and points to an assembly error as the root cause of failure. ball bearing spalling improper installation steel flaking SEM/EDX analysis load distribution AFNOR 100C6 (chromium alloy bearing...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001792
EISBN: 978-1-62708-241-9
... fracture rotary-bending fatigue steel ratchet marks beach marks star-shaped fracture pattern SEM/EDX analysis fatigue strength SAE 4340 (nickel-chromium-molybdenum alloy steel) UNS G43400 SAE 5046H (low-alloy chromium steel) UNS H50460 Introduction Investigation Methodology Results...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001029
EISBN: 978-1-62708-214-3
... micrograph showing a typical brittle overload fracture observed in a failed actuator casting. 315×. The fracture surfaces in the areas where the hot tear defects originated and in the brittle overload areas were analyzed for elemental chemical composition using an EDX microprobe attached to the SEM...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001084
EISBN: 978-1-62708-214-3
... and chromium levels of the impeller material are significantly greater than the specified maximum. The carbon and nickel levels of the impeller material are slightly above the allowable tolerances, while the manganese level is just below. Energy-dispersive x-ray (EDX) analysis was performed using the SEM...
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
... electron microscopy (SEM) and energy-dispersive x-ray (EDX) studies were carried out on the outer and inner surfaces of the gouged anode. EDX analysis of the unattacked nickel matrix showed the presence of nickel only ( Fig. 4 ). Analysis of the outer surface of the gouged resolidified nickel, however...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001118
EISBN: 978-1-62708-214-3
... through the spring wire. (a) Inclusions. As polished. 315×. (b) Microstructure. 63×. Energy-dispersive X-ray (EDX) analysis of the base metal revealed the typical type 302 stainless steel alloy composition ( Fig. 11 ). Several inclusions were evident in the cross-sectioned material; EDX analysis...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001267
EISBN: 978-1-62708-215-0
... of the spring during qualification testing. Applications Pertinent Specifications Visual Examination of General Physical Features All the samples were examined in an SEM equipped with an energy-dispersive x-ray (EDX) microprobe. Metallographic cross sections were also prepared in the longitudinal...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001706
EISBN: 978-1-62708-217-4
... confirmed that aluminium-containing pigment was applied on top of manganese phosphate primer to protect then the inner and outer surface of the beam. Fig. 17 SEM micrograph showing the locations used to generate EDX spectra to identify the constituents of the residue in the pit. 20× Fig. 18...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001310
EISBN: 978-1-62708-215-0
... with river water. One failed tube was submitted for failure analysis. The specimens were cut to suit the stage of the scanning electron microscope (SEM). Care was taken so that the attacked regions were not altered. Figure 1 shows a schematic of the specimen locations in the failed condenser tube...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0045903
EISBN: 978-1-62708-223-5
... to the longitudinal axis of the bleed hole and parallel to the major axis of the extrusion press housing, that is, in the same plane and direction as the fracture. Analysis of the stringers using the SEM/EDX system revealed high concentrations of sulfur and manganese, indicating the presence of manganese sulfide...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001028
EISBN: 978-1-62708-214-3
... originated at weld defects and a region of overload fracture in the root of the weld at the junction of the two sheets ( Fig. 13 , 14 , 15 ). SEM/EDX (energy-dispersive X-ray) analysis showed that this area contained some weld shrinkage ( Fig. 13 and 16 ), some nonmetallic inclusions ( Fig. 14 , 17...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001833
EISBN: 978-1-62708-241-9
... of grain boundaries ( Fig. 4b ). The SEM observation combined with EDX indicates that the microstructure of the steam chest material is primarily ferrite with granular, chrome-rich carbides. The grain boundary carbides frequently develop a chain or semicontinuous distribution ( Fig. 5 ). However, in spite...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001774
EISBN: 978-1-62708-241-9
... examination, however, showed the presence of large number of secondary cracks on the fracture surfaces ( Fig. 5 ). Compositional analysis carried out by using energy dispersive X-ray (EDX) analyzer attached to the SEM revealed that the corrosion products consisted of oxides of iron and chromium, and sulfur...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001696
EISBN: 978-1-62708-234-1
... of the fracture surfaces of the burst were analyzed via SEM, Figures 4 , 5 , 6 . A large pit was evident originating in the outer surface of the of the tube and extending across approximately one third of the fracture surface. The SEM examination revealed severe corrosion pitting of the tube adjacent...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001845
EISBN: 978-1-62708-241-9
... cause of failure and propose corrective measures. Visual inspection, scanning electron microscopy (SEM) equipped with an energy-dispersive X-ray (EDX) spectrometer for fractographic and microstructural evaluation, along with chemical analysis and hardness testing were used as the basic techniques...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001492
EISBN: 978-1-62708-235-8
... and 150 µin thick gold plating. Parallel cracks, perpendicular to the lead length, were observed with corrosion products/oxides in the crack. Some areas with flaked plating were also observed. SEM examination and EDX/WDX analyses showed the corrosion products to be oxides and chlorides of copper. Cross...