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SEM analysis

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Published: 01 June 2019
Fig. 1 Combined SEM/AES analysis of failed niobium alloy rocket-nozzle component. (a) Intergranular-fracture surface with contaminant particles on grain facets. (b) AES spectra of contaminated fracture surface More
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Published: 01 June 2019
Fig. 9 EDS analysis and corresponding SEM micrographs of different foreign particles observed on the fracture surface of the forging near the defect More
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Published: 01 June 2019
Fig. 10 EDS analysis and corresponding SEM micrographs of different inclusions More
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Published: 01 June 2019
Fig. 8 A 2,000× SEM of a pit. Chemical analysis showed high chlorine levels associated with the pitting. The pit walls are highly cracked. More
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Published: 01 January 2002
Fig. 36 SEM fracture-surface analysis of the failed hip prosthesis shown in Fig. 33 . (a) Fracture surface showing three distinct grains labeled A, B, and C. (b) Grain A has a shallow crystallographically oriented fracture structure. (c) Grain B has a crystallographically oriented fracture More
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Published: 01 June 2019
Fig. 3 EPMA analysis of inclusion stringers in failed extrusion press. (a) SEM micrograph of metallographic section near bleed hole. Note large inclusions. 490x. (b) EDX dot map of manganese. (c) EDX dot mop of sulfur More
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Published: 01 June 2019
Fig. 4 SEM fracture-surface analysis of the failed hip prosthesis shown in Fig. 1 . (a) Fracture surface showing three distinct grains labeled A, B, and C. (b) Grain A has a shallow crystallographically oriented fracture structure. (c) Grain B has a crystallographically oriented fracture More
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Published: 01 December 1993
Fig. 2 Standardless semi-quantitative SEM/EDS element analysis data and graph of typical corrosion residue present in some of the cracks in the eye of the second-stage impeller. The high sodium content was believed to be the corrosion component for the stress-corrosion cracks. Element More
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Published: 01 December 1993
Fig. 3 Standardless semi-quantitative SEM/EDS element analysis data and graph of a crack fracture surface. Base metal elements revealed that the impeller material was an AISI 4300 alloy steel. Element wt% at.% Silicon 0.27 0.53 Chromium 1.10 1.18 Manganese 0.88 More
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Published: 01 December 1992
Fig. 4 Standardless, semiquantitative SEM/EDS element analysis of the failed carrier shaft material revealed a carbon steel composition. No contaminants were present on the fracture surface. Element Precision, wt% at.% 2σ K -Ratio Silicon 0.41 0.82 0.12 0.0015 More
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Published: 01 December 1992
Fig. 5 Standardless, semiquantitative SEM/EDS element analysis of the weld material revealed a type 300 stainless steel composition. Element Precision, wt.% at.% 2σ K -Ratio Silicon 1.35 2.63 0.17 0.0051 Chromium 17.84 18.72 0.52 0.2143 Iron 74.56 72.84 More
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Published: 01 December 2019
Fig. 6 ( a ) SEM image of coke in inner surface. ( b ) EDS analysis of ( a ). ( c ) SEM image of coke in outer surface. ( d ) EDS analysis of ( c ) More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001105
EISBN: 978-1-62708-214-3
..., respectively. Visual examination of the bellows revealed cracks in heavily cold-worked areas (both inside and outside) and considerable corrosion. SEM analysis showed a classical intergranular failure pattern with microcracking. The threaded tie rod microstructure contained spheroidized carbide that was more...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001719
EISBN: 978-1-62708-231-0
... phase material, one can use various x-ray spectrographic techniques in conjunction with a scanning electron microscope (SEM). This study describes those metallographic and SEM analysis techniques for determining the mode of failure for a locomotive traction motor by LME. Intergranular fracture...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001301
EISBN: 978-1-62708-215-0
... Abstract Gears in a strip mining dragline failed in service. The material was identified as a low-alloy (NiCrMoV) steel. SEM analysis indicated that the initial fracture and subsequent fractures resulted from impact or a suddenly applied load. Mechanical testing indicated that the gears had low...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001383
EISBN: 978-1-62708-215-0
... either a fatigue mechanism or ductile overload failure. SEM analysis revealed that the mode of fracture was intergranular decohesion, which indicates an environmental influence in the fracture mechanism. The primary fracture initiated at a thread root and propagated by environmentally-assisted slow crack...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001803
EISBN: 978-1-62708-241-9
... Abstract Metallurgical SEM analysis provides many insights into the failure of biomedical materials and devices. The results of several such investigations are reported here, including findings and conclusions from the examination a total hip prosthesis, stainless steel and titanium compression...
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Published: 01 June 2019
Fig. 12 SEMs with EDS analysis showing the severe corrosion at ID of the Stage 3 tube. (a) Note the irregular shape of the corrosion products and loose/porous scale. (b) Note the embedded ash/silica particles. More
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Published: 01 June 2019
Fig. 13 SEMs with EDS analysis showing the severe corrosion at ID of the Stage 3 tube. (a) Note the porous nature of the corrosion products Cl (bright) and Si (dark). (b) Note the silica particles (smooth area). More
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...