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bulk analysis

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Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006759
EISBN: 978-1-62708-295-2
... failure analysis. It describes the general considerations for bulk and microscale chemical analysis in failure analysis, the most effective techniques to use for organic or inorganic materials, and examples of using these techniques. The article discusses the processes involved in the chemical analysis...
Image
Published: 01 December 1993
Fig. 6 EDS elemental analysis from the bulk external deposits removed from the reheater tube More
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006766
EISBN: 978-1-62708-295-2
... in the articles “ Optical Emission Spectroscopy ,” “ Inductively Coupled Plasma Optical Emission Spectroscopy ,” and “ Ion Chromatography ” in Materials Characterization , Volume 10 of the ASM Handbook , 2019, and in the article “ Bulk Elemental Analysis ” in the Metals Handbook Desk Edition , 2nd ed., 1998...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001645
EISBN: 978-1-62708-232-7
... content in the core as determined by EPMA is similar to the bulk analysis of carbon (C = 0.2%) reported earlier. The EPMA quantitative data thus indicates that the surfaces of the failed roller-bearing as well as the inner-race samples were enriched in carbon and indicative of case carburizing, as has...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001658
EISBN: 978-1-62708-229-7
... was not known; bulk chemical analysis had simply shown that iron was a major component. Optical microscopy and electron microprobe analysis were used to identify the deposits. In the first instance, the deposit was found to be debris that was left in the reheater tubes during boiler modification and swept...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001277
EISBN: 978-1-62708-215-0
... Typical microstructure of pearlite and ferrite observed in the tube samples. Nital etch. (a) 100×. (b) 800×. Chemical Analysis/Identification Corrosion or Wear Deposits Bulk internal deposits were collected from the tubes and analyzed using energy dispersive x-ray spectroscopy (EDS...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001107
EISBN: 978-1-62708-214-3
..., along with sooty residue. Patterns similar to those associated with erosion/corrosion damage were observed. Microstructural examination of wasted areas revealed a bulk matrix composed of massive carbides, indicating that gross carburization and metal dusting had occurred. X-ray diffraction analysis...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c9001631
EISBN: 978-1-62708-222-8
... the various groups of fishhooks: Chemistry Microhardness testing Metallographic cross section Tensile testing Items 1, 2, and 3 can easily be visualized, and conventional quality control techniques were used. (Chemistry was a bulk analysis—the hooks were only approximately 0.060...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003529
EISBN: 978-1-62708-180-1
... handling wavelength-dispersive spectrometry CHEMICAL ANALYSIS is often a useful tool for failure analysis. There are two main categories of chemical analysis that are often used by failure analysts: Bulk composition evaluation: often performed in order to determine whether the correct alloy...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001362
EISBN: 978-1-62708-215-0
... the results of the in-situ EDS analysis of the deposits present in the fracture terminus areas of the laboratory opened crack sample. Mechanical Properties Hardness The bulk metal hardness of the steam turbine disc was measured using the Rockwell test. The bulk metal hardness readings averaged...
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
... of inclusions would be expected to result in poor mechanical properties of the steel in the region. The final overload fracture of the remaining material was related to its low fracture toughness. Although the bulk chemical analysis conformed to the specification requirements for this alloy, the inclusion...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001365
EISBN: 978-1-62708-215-0
... for about 14 years. Specimen Selection The entire impeller element was available for examination and sectioning. Visual Examination of General Physical Features The damaged impeller, which is shown as received for analysis in Fig. 1 , was visually examined. Apparent cracking was observed over...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001047
EISBN: 978-1-62708-214-3
... corrosion in the Ferralium. 126×. Chemical Analysis/Identification Material and Weld Chemical analysis of the bulk materials was performed using scanning electron microscopy and energy-dispersive X-ray spectroscopy. Results indicated that the bulk chemical compositions of the tube sheet...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001508
EISBN: 978-1-62708-236-5
... absent from the spectrum taken from the bulk material ( Figure 9 vs. Figure 10 ). Fig. 9 Energy Dispersive Spectrum of Fracture Surface (Typical) Fig. 10 Energy Dispersive Spectrum of Bulk Material (Typical) The analysis concluded the cause of failure to be stress corrosion...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001683
EISBN: 978-1-62708-234-1
... in the filler (cast) zone of the weld yielded interesting results. With reference to Figure 13 , the electron beam was focused at several places on the wall of the pit and also outside of the pit in the adjacent filler material. The bulk analysis ( Table 2 ) is comparable to the weld material in Table 1...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c9001574
EISBN: 978-1-62708-223-5
... of a yellow porous layer was clearly evident between the nitrided layer and the coating, in case of the used punch. Cracks were observed to propagate from the outer surface into the bulk. Oxidation was evident along the cracks. The microstructural transformation observed in the case of the used punch...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006761
EISBN: 978-1-62708-295-2
... techniques and discusses the advantages and limitations of each technique when used in failure analysis. The focus is on various types of static load testing, hardness testing, and impact testing. The testing types covered include uniaxial tension testing, uniaxial compression testing, bend testing, hardness...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001809
EISBN: 978-1-62708-241-9
.... Additionally, the ceramic coating was completely removed from the impeller. Chemical analysis at two different locations was performed by inductively coupled plasma (ICP) spectroscopy. The results were consistent with a cast NAB alloy, C95800 ( Table 1 ). The aluminum content varied from 8.4 to 9.6 wt...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0048702
EISBN: 978-1-62708-220-4
... the formation of protective oxide films was recommended. Condenser tubes Salt water Sulfurization Aluminum brass Pitting corrosion A tube sample from an aluminum brass seawater surface condenser was received for analysis. This condenser had failed due to pitting after less than 1 year of service...
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
... Abstract The failure of a boiler operating at 540 °C and 9.4 MPa was investigated by examining material samples from the near-failure region and by thermodynamic analysis. A scanning Auger microprobe, SEM, and commercial thermodynamic software codes were used in the investigation. Results...