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quantitative metallography

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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.c9001787
EISBN: 978-1-62708-241-9
...Abstract Abstract A masonry type drill bit, designed for impact drilling in rock, fractured after a short time in service. Samples of the failed bit were analyzed using optical and scanning electron microscopy, quantitative metallography, and chemical analysis. The composition was found...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001531
EISBN: 978-1-62708-231-0
... composition of materials is presented in Table 1 . For comparison, all specimens were cut from the rim part of real wheels at the same position. The failure specimens were analyzed with a Hitachi S-2700 type scanning electron microscope (SEM). The microstructure parameters were determined by quantitative...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003532
EISBN: 978-1-62708-180-1
... of quantitative metallography to the study of fractures ( Ref 14 , 15 , 19 , 20 , 21 , 22 , 23 ). Much of this work has used measurements made on polished sections taken parallel to the crack-growth direction. This work provides new insight into fracture processes and should be useful in failure analysis...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003536
EISBN: 978-1-62708-180-1
...Abstract Abstract The quantitative characterization of fracture surface geometry, that is, quantitative fractography, can provide useful information regarding the microstructural features and failure mechanisms that govern material fracture. This article is devoted to the fractographic...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001281
EISBN: 978-1-62708-215-0
.... Surface Examination Metallography Chemical Analysis/Identification Alloy surfaces exposed to high temperatures and gas environments can become coated with foreign deposits (sulfates, oxides, chlorides, etc.) from combustion air or fuel contaminants. Corrosion products can react with or dissolve...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001072
EISBN: 978-1-62708-214-3
.... ∼0.59×. Fig. 5 Typical macroetched cross section of cover, vane, welds, and disk. All hardnesses are HRC. ∼0.51×. Nondestructive Evaluation Surface Examination Metallography Chemical Analysis/Identification Mechanical Properties Most Probable Cause The impeller...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001367
EISBN: 978-1-62708-215-0
... out lines the stress pattern cracks. Hatched out line shows three of the vanes. Arrows indicate where metallographic samples were removed Surface Examination Metallography Chemical Analysis/Identification Mechanical Properties The results of the analyses, examinations, and tests...
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
... Examination Metallography Chemical Analysis/Identification Mechanical Properties Most Probable Cause Remedial Action The impeller had been in operation for about 3 years when the defects were observed during a pump overhaul activity. The impeller was fabricated from an ASTM A743 grade...
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
... with energy dispersive x-ray spectroscopy (EDS) to establish the failure modes, (ii) metallography of prepared sections from the shafts, (iii) the determination of the chemical composition of the shafts by using spectroscopic chemical analysis, and (iv) measurement of the tensile properties and impact...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001284
EISBN: 978-1-62708-215-0
... AM60A (ASTM B94). Surface Examination Metallography Chemical Analysis/Identification Examination revealed that the stock riser had cold shuts present at the site where fracturing occurred on the other risers. Cold shuts occur during the casting process as metal flows into the mold and fails...
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
... (arrows) before it was fractured open in the laboratory. Fig. 2 Secondary crack after it was fractured open in the laboratory. Surface Examination Metallography Chemical Analysis/Identification The brittle, cleavage features of the lab fracture (rather than classic, tensile...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001083
EISBN: 978-1-62708-214-3
.... Metallography Chemical Analysis Identification Mechanical Properties Copper alloy C83600 is commonly used for water pump impellers as well as housings, as it is typically corrosion resistant in water. However, all copper alloys are susceptible to sulfide attack, and use in such an environment should...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001605
EISBN: 978-1-62708-217-4
... and origin position, topology, and details of interactions with microstructural features. The aim of this investigation was to use quantitative fractography as a tool to extract information, including striation spacing and size of the stretched zone, in order to make a direct correlation with fracture...
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
.... orthopedic fixation device fracture surface damage titanium alloy notches roughness metallography fatigue crack growth rates ASTM F136 (alpha-beta titanium alloy) UNS R56401 Introduction Investigation Discussion Conclusions References References 1. http://www.scoliosis.org...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001120
EISBN: 978-1-62708-214-3
... for verification of the chemical composition, measurement of hardness, and analysis of the heat-treated microstructure and surface conditions. Surface Examination Chemical Analysis/Identification Mechanical Properties Metallography The results of this analysis indicated that the composition...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001272
EISBN: 978-1-62708-215-0
.... 4 ) shows common direction of distortion. Testing conducted by various parties involved in the investigation included chemical analysis, optical metallography, tensile testing, subsize Charpy impact testing, Rockwell hardness testing, microhardness testing, and scanning electron microscopy...
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
... deposits were examined by optical metallography and by electron microprobe analysis. Since both deposits were porous, they were vacuum impregnated with an epoxy compound before standard encapsulation in Bakelite and diamond polishing for optical metallography. They had been analyzed chemically earlier...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001316
EISBN: 978-1-62708-215-0
... Examination Metallography Chemical Analysis/Identification Erosion is the consequence of turbulent flow eroding the protective oxide scale and base metal during operation. In boiler systems, an oxide scale is established to protect the components from further metal loss due to oxidation. This scale...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001375
EISBN: 978-1-62708-215-0
... of the valves had failed in service; the third had been rejected by the manufacturer because of porosity found during machining. The valves were reportedly from the same heat. Surface Examination Metallography Chemical Analysis/Identification Mechanical Properties Cracking was not caused...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001081
EISBN: 978-1-62708-214-3
... of disk bolt hole regions were visible with the naked eye. No evidence of component distortion or component discoloration (indicative of overheating) was noted. Nondestructive Evaluation Surface Examination Metallography Chemical Analysis/Identification Mechanical Properties Stress...