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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001251
EISBN: 978-1-62708-235-8
...Abstract Abstract In a steel foundry, tensile and bend specimens of castings made in a 2-ton basic arc furnace showed, at irregular intervals, regions with coarse-grained fractures where the specimens broke prematurely, so that the specified strength and toughness values could not be reached...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001533
EISBN: 978-1-62708-225-9
... presents the microstructure of the specimens. Figure 1(a) shows that the structure corresponds to the babbit of the selected composition and consists of α phase (solid solution of antimony and copper in tin), β phase (SbSn cubic crystals), and η phase (Cu 6 Sn 5 compound). The babbit structure revealed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001458
EISBN: 978-1-62708-220-4
... by a movable bearing in a cast iron swan neck frame. The machine was one of several installed in a chemical works and was used to remove dilute nitric acid from lead nitrate. The discharge weight of crystals from the basket was approximately 6 cwts. after drying, the centrifuge being filled and discharged...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001758
EISBN: 978-1-62708-241-9
... at carbides and other microconstituents, especially in single crystal castings that do not possess grain boundaries. gas turbine engine components creep deformation overheating nickel-base superalloy interdendritic stress-rupture fracture stress-rupture testing stress-rupture life Cast nickel...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001263
EISBN: 978-1-62708-224-2
... in a predominantly pearlitic steel seemed to us unusual. The behaviour of the material in the vicinity of the fracture could be observed exactly by an electron microscopic examination of a carbon replica. Figure 4 shows a slip plane in the pearlite where the two crystal halves are displaced by about half...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003538
EISBN: 978-1-62708-180-1
... concepts. bending brittle fracture compression failure deformation ductile crack nucleation ductile fracture ductility fractography manufacturing imperfections metals microvoid coalescence notched specimen plastic flow root cause failure analysis single-crystal cleavage models specimen...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006775
EISBN: 978-1-62708-295-2
..., cleavage across a grain on a single plane would be expected to result in smooth fracture surfaces. Such results are sometimes observed in high-purity, single-crystal specimens but are seldom seen in commercial engineering materials. Commercial engineering materials contain both a distribution of inclusions...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001769
EISBN: 978-1-62708-241-9
... total reflectance) technique. The sample was directly placed in the zinc selenide crystal and the spectrum was recorded in the transmittance mode. Scanning Electron Microscope (SEM) Studies Stainless steel coupons of size 1 × 2 cm were mechanically polished to mirror finish and immersed in 10...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001908
EISBN: 978-1-62708-235-8
... checks” ( Fig. 1 ) on the surface of the tailcones, while radiography showed indications of foreign material (both more and less dense than the casting material), gas holes, and shrinkage defects. Tensile testing of specimens machined from the component showed that the material did not meet the required...
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
...Abstract Abstract Various aluminum bronze valves and fittings on the essential cooling water system at a nuclear plant were found to be leaking. The leakage was limited to small-bore socket-welded components. Four specimens were examined: three castings (an ASME SB-148 CA 952 elbow from a small...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001450
EISBN: 978-1-62708-231-0
... a crystalline appearance, suggestive of intergranular failure, the outlines of the constituent crystals being clearly visible under low-power magnification. In some rivets small cracks were also present in the shanks close to and parallel to the plane of fracture. Sections parallel to the axes of the rivets...
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
... Scientific Incident x-ray photons pass through a “window” that separates the detector from the vacuum chamber of the SEM, penetrate the lithium-infused single-crystal silicon chip, and are absorbed. The major result of this conversion of energy is in the production of electron/hole pairs within...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001451
EISBN: 978-1-62708-224-2
... distribution of the carbides; the structure of this specimen is depicted in Figure 11 , which also shows cracks, of the type referred to above, that were present in the pre-existing ferrite crystals. Fig. 11 Etched. (×250). The failure of this hook is attributable to strain-age embrittlement...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001459
EISBN: 978-1-62708-234-1
... of rest between stress cycles. Characteristic Features of Basic Crack Types The characteristic features of fatigue cracks that arise in service will now be considered. Most of them can be reproduced in fatigue tests on suitable specimens, as has been ably shown by Bacon 6 , who has done much work...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001401
EISBN: 978-1-62708-220-4
...Abstract Abstract Following disruption of the austenitic stainless steel basket of a hydro-extractor used for the separation of crystals of salt (sodium chloride) from glycerin, samples of the broken parts were analyzed. Examination revealed that the fish-plates joining the reinforcing hoops...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001252
EISBN: 978-1-62708-235-8
... particles could be discerned on the conchoidal fracture planes with the SEM. The precipitates proved to be thin and partially transparent platelets of a hexagonal crystal lattice whose parameters resemble those of AIN. The precipitates were at least in part still undissolved in spite of the long holding...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047080
EISBN: 978-1-62708-235-8
... MPa (1000 psi) and dimensionally inspected. Investigation Visual inspection showed that some of the tubes failed by blow out of a section of the wall; some blow outs produced edges with sharp cleavage planes typical of a shear failure in a single crystal. Figure 1(a) shows an example believed...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006781
EISBN: 978-1-62708-295-2
.... The subsurface evolution will generally follow the same rate equation as that governing oxidation. This is shown in Fig. 4 , in which the cross section of a single-crystal nickel-base superalloy was sectioned and chemically etched after TMF testing. The surface of the test specimen is at the bottom of the image...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001258
EISBN: 978-1-62708-235-8
... for investigation with contiguous wire segments on both sides of the fracture of 300 mm each. Longitudinal and transverse sections were taken through the fracture and at the cut ends from all wire specimens. Figures 1 and 2 reproduce a longitudinal and transverse section of a fracture location. In addition...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0090451
EISBN: 978-1-62708-218-1
... surface. 20× Micro-FTIR was performed in the ATR mode on a core specimen of the jacket material. The resulting spectrum was consistent with a thermoplastic polyester resin. Such materials, including PET and PBT, cannot be distinguished spectrally, and a melting point determination is usually used...