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large grain structure

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Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001270
EISBN: 978-1-62708-215-0
.... Examination revealed that areas near the parting line exhibited a large grain structure not present in the forged stock. High-temperature scale was also found in the cracks. It was concluded that the cracks were caused by material being folded over the parting line. The folding occurred because of a mismatch...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0047199
EISBN: 978-1-62708-234-1
... that rolled bar stock should be preferred to extruded bar stock. Differences in grain structure of the forgings, as induced by differences in thermal-mechanical history of the forged material, can have a significant effect on susceptibility to exfoliation corrosion. Regarding thermal treatment, the results...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047991
EISBN: 978-1-62708-225-9
... austenitized. Displacement of metal on the outer raceway was revealed by elongation of grain structure. It was concluded that the failure of the raceway surface was due to incomplete austenitization caused by the improper heat treatment during flame hardening process. Antennas Austenitizing Bearing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001510
EISBN: 978-1-62708-217-4
... fracture disclosed a flat surface with a wood grain textured appearance over the entire fracture plane. One large fanshaped area was evident radiating circumferentially across one third of the fracture surface of the component, as shown in figure 1 . The semi-circular region appeared to have initiated...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001821
EISBN: 978-1-62708-241-9
... large grain structure continuous transverse grain boundaries microstructural analysis ultimate tensile strength A202B (chromium-manganese-silicon alloy steel) Background Failure Investigation of Excess Flow Valves on Stationary Tank BLEVE of Truck-Mounted Tank Discussion of BLEVE...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001082
EISBN: 978-1-62708-214-3
... that circulated around the impeller surfaces is given in Table 1 . Chloride was present in significant quantities. The presence of high-chloride-content fluid that fluid that flushed the leading-edge cracks of the 304L impeller blades (the location of a large grain structure and high stress) resulted...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001347
EISBN: 978-1-62708-215-0
... properties, exhibited low impact values which may be attributed to its large grain structure; the microstructure indicates that the head was not normalized. Charpy V-notch impact properties for tank fragments Table 2 Charpy V-notch impact properties for tank fragments Fragment Charpy V-notch...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006816
EISBN: 978-1-62708-329-4
... potential, this treatment can result in large austenite grains, excessive retained austenite at the surface, and low hardness and toughness. A better structure is produced by air cooling from the carburizing furnace, reheating to just above Ac 1 , and quenching to harden. At the austenitizing...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001026
EISBN: 978-1-62708-214-3
... grain size, as deduced from the apparent cleavage facet size, was very large. When examined at high magnifications in an SEM, the fracture surface looked somewhat like an intergranular fracture, with a much smaller grain size. The intergranular appearance was unusual, in that it did not have...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001077
EISBN: 978-1-62708-214-3
... through wedge-shaped area associated with initiation, showing large area of ferrite just inside the carburized layer of tooth in an otherwise martensitic structure. 5% nital etch. 40×. Fig. 6 Cross section showing layer of ferrite grains below fracture surface of tooth No. 2 in core. Defect...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001135
EISBN: 978-1-62708-219-8
... and annealed. Since the deformation is always greater in the surface layers, the plate will have a finer recrystallized grain structure in this region. Because the interior will be at higher temperatures for longer times during cooling, grain growth can occur in the interior of large pieces. This is especially...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001734
EISBN: 978-1-62708-234-1
... that these features were residual melt in the grain boundaries, which sustained a cold fracture during separation. Fig. 1 As-received actuator—note removal of paint and location of fracture. Fig. 2 Structure in center of fracture contains grains joined by tendrils. Magnification 840 times...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001717
EISBN: 978-1-62708-217-4
... temperatures during thermal treatment. These large grains offered less resistance to fatigue and SCC. In addition, evidence of titanium-carbo-nitrides was detected at the grain boundaries of this material that was prohibited according to the governing specification. This phase is formed at higher thermal...
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
.... (a) Macrograph of the tube showing blow out that appears to involve the loss of a single large grain. (b) Structure near the neutral axis of the bend. The huge grain at lower left (light area) occupied almost the entire wall thickness of the tube and was 5 to 7.6 mm (0.2 to 0.3 in.) long. 65× Other...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001776
EISBN: 978-1-62708-241-9
... . The macrostructure reveal a cleavage-like brittle fracture with grainy texture, while the micrographs reveal an austenitic structure with large carbides at the grain boundaries as well as in the austenite grains ( Figs. 3 – 5 ). However, the micrograph of the sample that was given solution treatment did not reveal...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048403
EISBN: 978-1-62708-226-6
..., the fracture surface of the cast cobalt-chromium-molybdenum alloy screw had an erratic structure ( Fig. 3a ), which can be explained by the large grain size and the tendency of the grains to fracture along crystallographic planes. Figure 3(b) shows such fracture planes of differently oriented grains...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047187
EISBN: 978-1-62708-225-9
... side ( Fig. 1b ) consisted of coarse acicular martensite with a large percentage of retained austenite. Parts with such a structure usually have a relatively low wear resistance because of low hardness. They are also very sensitive to shock because of their large grain size. Fig. 1 Forged 1.60Mn...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003507
EISBN: 978-1-62708-180-1
... internal quality due to compressive deformation Grain refinement Uniform grain structure Elimination of casting porosity and breakup of macrosegregation patterns Beneficial grain-flow pattern for improved part performance Improved toughness and/or fatigue resistance due to grain flow...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001819
EISBN: 978-1-62708-180-1
.... 10×. (g) Shearing crack (arrow, f). 130× In contrast, the fracture surface of the cast cobalt-chromium-molybdenum alloy screw had an erratic structure ( Fig. 13a ), which can be explained by the large grain size and the tendency of the grains to fracture along crystallographic planes. Figure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001581
EISBN: 978-1-62708-235-8
.... Microstructural examination was performed prior to and after creep testing. Prior to the creep tests, the cold-drawn wire had flow lines, large non-equiaxed grains, and few carbides. The material exposed to three years of service had a very fine grain size, ASTM E112, No. 11 to 12, and numerous carbides...