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SEM/EDS fracture surface 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.c9001825
EISBN: 978-1-62708-241-9
... longitudinal and transverse cracks SEM/EDS fracture surface analysis tensile stress 304 (austenitic wrought stainless steel) UNS S30400 Introduction This paper details the investigation of the failure of a tube from a boiler stack economizer. The economizer was in a boiler at an ethanol plant...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001318
EISBN: 978-1-62708-215-0
... below design pressure in a brittle manner. Fractographic examination using SEM indicated that failure occurred intergranularly from the cylinder side. EDS analysis indicated the presence of mercury on the fracture surface and mercury was also detected using scanning auger microprobe (SAM) analysis...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001784
EISBN: 978-1-62708-241-9
... Original A Original B Hardness (HRB) 16 (±1) 18 (±0.25) 15 (±0.9) Scanning Electron Microscopy (SEM)/Energy Dispersive Spectroscopy (EDS) Analysis Figure 4 shows scanning electron micrograph of the fractured wrench socket indicating two pure brittle outer layer with a core region...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001371
EISBN: 978-1-62708-215-0
.../Fractography The fracture initiation sites in samples A and B were examined in the SEM and subjected to EDS analysis in the as-received condition. Figures 3 show that the fracture surface in the initiation area had an intergranular morphology and was covered by a corrosion product. EDS analysis...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0090994
EISBN: 978-1-62708-225-9
... strength range was 1689 to 1793 MPa (245 to 260 ksi). The finished springs were to be shot peened for greater fatigue resistance. Investigation (visual inspection, 3x images, 2% nital etched 148x SEM images, chemical analysis, hardness testing, and EDS analysis) supported the conclusion that the springs...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001633
EISBN: 978-1-62708-221-1
... Abstract Failure analysis of a mobile harbor crane wheel hub that included SEM and EDS analyses demonstrated that the mechanism of failure was fatigue. The wheel hub was a ductile cast iron component that had been subjected to cyclic loading during a ten-year service period. The fracture...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001324
EISBN: 978-1-62708-215-0
... electron microscope (SEM) to document fracture features. The fracture surface deposits were analyzed by energy dispersive x-ray spectoscopy (EDS). Figure 3 shows typical SEM photographs of the crack surfaces. The primary, secondary, and lab fracture surfaces exhibited the same fracture features. Fig...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001098
EISBN: 978-1-62708-214-3
... NR Molybdenum 0.20 NR Iron bal bal (a) NR, no requirement During the initial SEM examination, deposits on the fracture surfaces of screws No. 1 and 4 were examined in situ using energy-dispersive X-ray spectroscopy (EDS). EDS provides qualitative elemental analysis...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001102
EISBN: 978-1-62708-214-3
... embrittlement (LME). Fig. 6 SEM micrograph of a fracture surface, depicting a melted and resolidified cadmium layer over an intergranular topography. EDS analysis was performed at “A” (see Fig. 7 ). 1540×. Fig. 7 Cracks in stud 3, filled with cadmium. EDS analyses were performed at “B...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001614
EISBN: 978-1-62708-225-9
... of the failed screw with fracture surface. SEM, 10× These so-called microfractographic fracture surface elements are specific to the method, or rather mechanism, of fracture. 4 Using these elements, it is possible to deduce the initial loading conditions of the mechanical part, as well as the role...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006943
EISBN: 978-1-62708-395-9
.... Scanning electron microscopy instruments combined with an energy-dispersive spectroscopy (EDS) attachment (also referred to as EDX) allow the elemental chemical analysis of plastic materials. The EDS analysis with an SEM instrument can produce additional information for the plastic surfaces. The SEM...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001088
EISBN: 978-1-62708-214-3
... fracture surface from specimen A was removed for analysis to determine material composition. Standardless, semiquantitative SEM/EDS element analyses of the fracture surface revealed a carbon steel shaft and a type 300 stainless steel weld nugget ( Fig. 4 and 5 ). Fig. 4 Standardless...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001101
EISBN: 978-1-62708-214-3
... and laboratory-opened fracture surfaces of the screw were examined with a stereomicroscope at magnifications of 7 to 45× and with a scanning electron microscope (SEM) at much higher magnifications. The fracture surfaces displayed similar fracture modes. Figure 2 shows the overall fracture surface. Figure 3...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001801
EISBN: 978-1-62708-241-9
... arrows Semi-quantitative chemical analysis was performed using SEM/EDS and the results were listed in Table 1 . The data showed that rod “B” had low aluminum and that iron was present, which might be a surface contaminant. Rod “A” chemical analysis met the chemistry specification for ASTM F136...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001841
EISBN: 978-1-62708-241-9
... testing. SEM analysis showed that striations were present on the fracture surface, indicating that a fatigue crack preceded the overload fracture as shown in Fig. 6 and 7 . Several other cracks were observed at multiple locations along the stent, shown in Fig. 8 . Fig. 6 SEM image of fractured...
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
... and 14 ; consistent with brittle fracture in steels. EDS analysis (not shown) revealed that the plating on the caster was zinc. Fig. 12 Stereomicroscope image of the fracture surface Fig. 13 SEM image of the fracture surface near the origin showing brittle cleavage Fig. 14 SEM...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001355
EISBN: 978-1-62708-215-0
... Microscopy Fractography Examination of the fracture surface in the SEM revealed a flat oxidized fracture, typical of fatigue. Pits were found at each of the three fracture origins. Two origins are shown in Fig. 3 . The pits were 0.013 to 0.076 mm (0.0005 to 0.003 in.) deep. On the machined surface...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001333
EISBN: 978-1-62708-215-0
... electron microscope (SEM), and the inner and outer surface oxides/deposits were analyzed using EDS. In the SEM, the thick oxide/deposit on the inner surface near the fracture surface appeared to contain many constituents ( Fig. 9 ). These areas, as well as the oxide/deposit on the outer surface, were each...
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
... electron image. The image revealed an intergranular mode of fracture as shown in Figures 12 , 13 . Next an energy dispersive scan (EDS) was taken of the surface to determine if copper penetration had occurred and wetted the surface. Fig. 12 SEM image of intergranular fracture surface from secondary...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001066
EISBN: 978-1-62708-214-3
... Material Qualitative chemical analysis of the spool piece material was performed using SEM and energy-dispersive X-ray spectroscopy (EDS). Results indicated that the alloy composition was consistent with low-carbon steel. Coatings or Surface Layers SEM/EDS analysis of the fracture surfaces...