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qualitative test

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001012
EISBN: 978-1-62708-234-1
..., with the cracks starting on the inside surfaces of the tubes. There was no known corrosive agent in the system, and no other corrosion damage could be found. Qualitative tests and spectrographic analysis gave a positive indication for mercury. The spacing of the cracks, the branched intergranular cracking...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006932
EISBN: 978-1-62708-395-9
... a consequence of high coefficients of thermal expansion and low thermal diffusivities. Although time-consuming techniques can be used to analyze thermal stresses, several useful qualitative tests are described in this article. The classification of internal stresses in plastic parts is covered. The article...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048777
EISBN: 978-1-62708-229-7
..., indicative of pre-existing cracks, were revealed by examination of the fracture surface at the drain grooves arc gouged at the nozzle sites. A thin layer of material with a dendritic structure was observed at the groove surface. The dendritic layer was revealed by qualitative microprobe analysis to contain...
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: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001329
EISBN: 978-1-62708-215-0
... factors, the information presented should be viewed from a qualitative, rather than quantitative, perspective. Results of EDS scans (semiquantitative analysis) Table 1 Results of EDS scans (semiquantitative analysis) Specimen Composition, % EDS scan Mill test report Cu Al...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001336
EISBN: 978-1-62708-215-0
... quality-control personnel per ASTM A380, “The Copper Sulfate Test” (section 7.2.5.3). No hardness or tensile specifications were cited. Specimen Selection Several pipe flange assemblies were submitted for analysis—both unused and used, and both old and new. Visual Examination of General Physical...
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
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0048846
EISBN: 978-1-62708-234-1
... were found contain small cracks and microvoids. A mechanism of intergranular creep rupture at elevated temperature was identified as a result of a series of stress-rupture and tensile tests. It was revealed by the crack shape that cracking initiated on the pipe exterior, then propagated inward...
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: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001066
EISBN: 978-1-62708-214-3
... present in the process stream. Circumstances Leading to Failure The pipe was removed from the system after cracks were observed in the painted coating. Sample Selection The entire 460 mm (18 in.) length of spool piece was sent for analysis. Testing Procedure and Results Surface...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001354
EISBN: 978-1-62708-215-0
..., MPa (ksi) 658 (95.4) 682 (98.9) 590 (85) min Elongation, % 22.8 19.7 17 Reduction of area, % 72.0 68.4 45 Fracture Toughness To qualitatively assess the rotor disk toughness, Charpy bars were machined and tested. Ten bars were machined so that their longitudinal axes were...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001319
EISBN: 978-1-62708-215-0
... observed, indicating contamination by rusted carbon steel particles. Liquid penetrant testing was used to determine the extent of the cracks, and in situ metallographic analysis was performed over the cracked region. The morphology of the cracks was indicative of transgranular stress-corrosion cracking...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006941
EISBN: 978-1-62708-395-9
... while an input frequency is maintained. The frequency ω (rad/s) in a dynamic test qualitatively relates to the time variable in a transient experiment through ω = 1/ t ( Ref 5 , 8 , 10 ). Depending on the frequency range of interest, the experimental analysis employs free vibration, resonance...
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
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001076
EISBN: 978-1-62708-214-3
... of General Physical Features The component was ring-shaped, with 12 individual bearing pads. Each pad was separated by an oil groove, as shown in Fig. 1 . Fig. 1 Thrust bearing face, showing overall damage. 0.33×. Testing Procedure and Results Surface Examination Visual The ESD...
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
... of damage, qualitative fractographic work combined with metallography and mechanical testing are usually sufficient. In routine investigations, the fracture origin, the kind of fracture, and special features on the fracture surface are described. The goal of this investigation was to obtain information...
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
.... Optical Emission Spectroscopy Optical emission spectroscopic (OES) methods are some of the most commonly used techniques in elemental analysis and alloy identification. The OES methods are commonly used in failure analysis for quantitative and qualitative determination of primary and trace elemental...
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
.... Qualitative chemical tests used in materials identification Table 1 Qualitative chemical tests used in materials identification Element tested for Reagent Positive result Applications Chromium Diphenylcarbazide Violet color Identify chromium-free steel Cobalt Ammonium thiocyanate...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001114
EISBN: 978-1-62708-214-3
..., and hardness testing and for rnicrostructural analysis. The fracture surface was examined under a scanning electron microscope (SEM). Fig. 2 (a). As-received clamp. (b) and (c) Mating fracture surfaces, showing fracture initiabon site at handling pad eye (arrows). Visual Examination of General...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006800
EISBN: 978-1-62708-329-4
... specification (or functions) and the underlying physical concept and preliminary layout to achieve the intended functions A detailed design stage involving both the qualitative definition of part configuration and the quantitative analysis of design parameters (e.g., dimensions, tolerances, materials...