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quantitative tests

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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 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 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.c9001136
EISBN: 978-1-62708-229-7
... amplitude derived from quantitative fractographic studies, to give values in excess of 160 to 170 MPa. Discussion and Additional Tests The evidence of the previous section indicates that, in the case of this particular fan failure, the cyclic stress amplitudes (>100 MPa) were much higher than...
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
... in the United States for engineered metals are International Organization for Standardization (ISO), American Society for Testing and Materials (ASTM), Society of Automotive Engineers (SAE), Aerospace Materials Specifications (AMS), American Iron and Steel Institute (AISI), and military standards (MIL), which...
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
... on the basis of quantitative fractography results is probably closer to the mean SII. Simulation Tests Spin-pit simulation tests were conducted on fully bladed disks in vacuum. Details of the spin-pit test apparatus are given in Ref 6 . Two loading sequences (constant amplitude and variable amplitude...
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...
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
... were undertaken to determine the mode of cracking. Visual Examination of General Physical Features The second-stage impeller was examined and magnetic particle tested at a local machine shop. The eye, vane tip, and the stress pattern cracks on the outside surface of the backing plate were marked...
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
... polymers (polyvinylidene fluoride or perfluoroalkoxy alkane), by the qualitative detection of either chlorine or fluorine. Analysis for material identification is useful for a preliminary determination before quantitative analysis is done, or it may be the only analysis possible when destructive testing...
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
... much of its surface. Fig. 1 As-received main boiler feed pump impeller Testing Procedure and Results Surface Examination Visual The impeller surfaces were examined using a stereomicroscope at magnifications from 7 to 67.5×. Apparent cracking was observed on many areas...
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 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
... to the outer diameter. The entire impeller surface was tested by the dry magnetic particle method. Visual and microstructural examinations revealed intergranular cracking. Energy-dispersive spectroscopy of corrosion products contained in the cracks disclosed the presence of chlorine and sulfur The failure...
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
... and 500× magnifications, respectively. To observe the microstructures of the case and core regions, the polished samples were etched in 3% nital (3 ml HNO 3 in 97 ml ethanol) and observed in a light microscope at 1000× magnification. For corroborating phase identity, Vickers microhardness tests were...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001691
EISBN: 978-1-62708-234-1
.... It causes equipment to fail because of perforation with only a small percent weight loss of the entire structure. It is difficult to detect pits because of their small size and because the pits are often covered with corrosion products. It is difficult to measure quantitatively and compare the extent...
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
... Abstract A segment from a premium-quality H13 tool steel die for die casting of aluminum failed after only 700 shots. The segment was subjected to visual, macroscopic, hardness, and metallographic testing. The investigation revealed that failure occurred as a result of fatigue at an electrical...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006909
EISBN: 978-1-62708-395-9
... properties as a function of exposure time. A major challenge is to ensure that performance testing for determination of chemical resistance (level of degradation) is based on a set of quantitatively measurable criteria, avoiding qualitative or subjective assessment. It is important to note...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001474
EISBN: 978-1-62708-224-2
...° to give a partially crystalline fracture. A further notched piece, broken in a vice by means of hammer blows, gave a similar result. The latter tests indicated that the material was notch-brittle and, in order to provide a quantitative assessment of this aspect, Charpy test pieces were prepared...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006933
EISBN: 978-1-62708-395-9
... spectroscopy, energy-dispersive x-ray spectroscopy, differential scanning calorimetry, thermogravimetric analysis, and dynamic mechanical analysis. The article describes the methods for molecular weight assessment and mechanical testing to evaluate plastics and polymers. The descriptions of the analytical...
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
...) before it was fractured open in the laboratory. Fig. 2 Secondary crack after it was fractured open in the laboratory. Testing Procedure and Results Surface Examination Scanning Electron Microscopy Fractography Both primary and secondary cracks were examined using a scanning...
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
... (ASTM B94). Testing Procedure and Results Surface Examination The riser removed from stock was examined visually and using a stereomicroscope (up to 45×) to evaluate the surface of the riser at the sites where fracturing had occurred on the failed risers. Three of the broken risers had...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001133
EISBN: 978-1-62708-214-3
... failures (Other, miscellaneous, or unspecified) failure Background A femoral knee implant was returned to the casting vendor for analysis after exhibiting poor bond strength between the cast substrate and a sintered porous coating during routine quality-control testing at a prosthetic...