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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 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 techniques...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001571
EISBN: 978-1-62708-229-7
... of three people hired to perform the review [ 7 ]. We concluded that the temperature estimates were reasonable and suggested that quantitative microscopy, aided by selective etching, might permit a more precise estimate of the degree of thermal exposure. Subsequently, the writer obtained the metallographic...
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
... 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 mechanic...
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
... Abstract Identification of alloys using quantitative chemical analysis is an essential step during a metallurgical failure analysis process. There are several methods available for quantitative analysis of metal alloys, and the analyst should carefully approach selection of the method used...
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Published: 01 January 2002
Fig. 14 Quantitative correlation between the roughness parameter, R S , and stress-intensity factor range ΔK for fatigue specimens of two cast irons. (a) D4018 cast iron. (b) D5506 cast iron. Source: Ref 12 , 88 More
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Published: 01 January 2002
Fig. 19 Quantitative correlation between the ultimate tensile strength and the area percentage of voids on the corresponding fracture surfaces of high-pressure die-cast AM60 magnesium alloy specimens having the same dendrite arm spacing. Source: Ref 3 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
Image
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
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001136
EISBN: 978-1-62708-229-7
... and flaw size at failure, coupled with quantitative SEM fractography using striation spacing methods, revealed that the cyclic stress amplitudes just prior to failure were much larger than expected, in this particular case. Subsequent improvements in fan design and fabrication have effectively alleviated...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001532
EISBN: 978-1-62708-232-7
... roll quality, viz. characteristics of graphite, carbides, martensite, etc., have been extensively studied through optical microscopy, quantitative image analysis (QIA), and electron-probe microanalysis (EPMA). These are discussed in the context of spalling propensity and roll life. Hardness Hot...
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 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 Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006936
EISBN: 978-1-62708-395-9
... Abstract Of the many different nondestructive evaluation (NDE) techniques, ultrasonic inspection continues to be the leading nondestructive method for inspecting composite materials, because measurements can be quantitative and the typical defect geometries and orientations lend themselves...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006770
EISBN: 978-1-62708-295-2
... for failure analysis, qualitative results are adequate, but the method can determine quantitative elemental compositions to a precision of 0.01 wt% with relative accuracies of ±5%, depending on the specific material, type of x-ray detector used, the method of data analysis employed, and, as always, the skill...
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Published: 15 May 2022
Fig. 5 Typical energy-dispersive x-ray spectroscopy spectrum showing absorption features indicative of unique elements and the quantitation of those elements. cps, counts per second More
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Published: 01 January 2002
Fig. 9 X-ray elemental dot maps for copper and tin taken at three typical areas exhibiting penetration of the bearing elements. The three regions shown in the specimen current images (left) were quantitatively analyzed for copper and tin; results are given under the concentration maps. All 320× More
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Published: 15 January 2021
Fig. 7 Precipitate in a precipitation-hardened (PH) steel fracture surface, labeled as Spectrum 1, and energy-dispersive spectroscopy spectrum from the corresponding point showing nearby steel constituents (iron, chromium, nickel, and copper) that are detected. According to the quantitative More
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
..., the distinguishing alloying additions are low and the overlapping tensile requirements make hardness values inconclusive. Quantitative versus Qualitative Bulk Chemical Analysis When performing bulk chemical analysis, it is important to discern whether the technique being employed is considered quantitative...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001535
EISBN: 978-1-62708-232-7
... LEITZ-MM6 model, Leica, GmbH, Wetzla, Germany, microhardness tester to corroborate phase identification. Unetched specimens were also examined to observe nonmetallic inclusions. Automatic quantitative image analysis was carried out on polished and etched microsections to determine the volume percent...
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
... the inside, cooled in liquid nitrogen, and fractured open to enable analysis of a fracture surface. Standardless semi-quantitative scanning electron microscopy/energy-dispersive x-ray spectrometry (SEM/EDS) analysis revealed a high sodium content in the corrosion product ( Fig. 2 ). The base metal elements...
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
... was analyzed to determine its chemical quantitative composition. An area that contained an apparent repair weld was also analyzed using energy-dispersive x-ray spectroscopy (EDS) under a standardless quantitative (SQ) analysis program. EDS provides semiquantitative elemental analysis of materials under SEM...