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deformed grains

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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
... direction. A zone of heavily deformed grains at the fracture edge was revealed by longitudinal metallographic examination. The shearing fractures of a commercially pure titanium screw and a cast cobalt-chromium-molybdenum alloy were discussed for purpose of comparison. Deformation Surcigal implants...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048399
EISBN: 978-1-62708-226-6
...Abstract Abstract Two of four adjustable Moore pins, which had been used to stabilize a proximal femur fracture, were found to be broken and deformed at their threads. The pins were made from a cobalt-chromium alloy and were not in the same condition. Brittle precipitates in the grains...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001687
EISBN: 978-1-62708-220-4
... surrounding the macrovoids and the concentration of stresses at their tips, caused extensive localized plastic deformation which led to the formation of microvoids and subsequently to the spalling of the oxide film. The non-protective character of the film induced a progressive deterioration of the grain...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001799
EISBN: 978-1-62708-241-9
... the bearings led to the transfer of material. gear shaft fatigue fracture seizing high-strength low-alloy steel scoring marks deformed grains uniaxial fatigue testing macrofeatures 4145 (high-strength low-alloy steel) UNS G41450 Introduction Service History Observations and Analyses...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001011
EISBN: 978-1-62708-229-7
..., approximately halfway through tube wall. Note grain boundary voids. Nital etch. Fig. 3 Wedge-type cracks seen in Fig. 2 , shown in more detail. Nital etch. At the inside surface of the tube the fracture showed extensive plastic deformation, and the overall sequence of failure may be given...
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
...Abstract Abstract Deformation, surface cracking, and spalling on the raceway of the outer ring (made of 4140 steel) of a large bearing caused it to be replaced from a radar antenna. The raceway surfaces were to be flame hardened to 55 HRC minimum and 50 HRC 3.2 mm below the surface, according...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001302
EISBN: 978-1-62708-215-0
... in the region which undergoes the most deformation during forging. Moreover, the cracks exhibited rounded large intergranular facets associated with localized melting at the grain boundaries. Throughout the shoulder regions there were solidification shrinkage cavities and MnS inclusions. The latter showed...
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
... exhibiting slip-dominated failure. (b) Out-of-phase bithermal fatigue TMF exhibiting large-scale viscoplastic deformation (fatigue creep). Source: Ref 3 Fig. 6 (a) Cross section near the fracture surface of a single-crystal nickel-base superalloy tested in thermomechanical fatigue (TMF...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001607
EISBN: 978-1-62708-231-0
... population of silicates and oxides and a few nitrides and sulfides ( Fig. 6 ). The silicates were observed to be present as long stringers ( Fig. 7 ). After etching with aqua regia, the sample showed severely deformed grains of austenite ( Fig. 8 ). Fig. 6 Longitudinal section of the failed wire...
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 Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0047199
EISBN: 978-1-62708-234-1
... heat treatments. A section through a forging fabricated from material 1 (extruded stock) in the as-received (T6) temper is shown in Fig. 1(b) . The metal had an interior structure composed of highly deformed elongated grains (micrograph A, Fig. 1 ) and a thin, partly recrystallized grain...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006835
EISBN: 978-1-62708-329-4
... and improved mechanical properties by: Improved internal quality due to compressive deformation Grain refinement and beneficial grain-flow patterns Elimination of casting porosity and breakup of macrosegregation patterns Improved toughness and/or fatigue resistance due to grain flow and fibering...
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
... adjustable Moore pins, which had been used to stabilize a proximal femur fracture, were broken and deformed at their threads. The pins were made from a cobalt-chromium alloy and were not in the same condition. One pin contained brittle precipitates in the grains and grain boundaries. Correspondingly...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001824
EISBN: 978-1-62708-241-9
... are pronounced. In contrast, the intact nut showed small equiaxed grains (deformed grains) typical of nickel-base superalloy, as shown in Fig. 6 and 7 , respectively. Fig6 Typical microstructure for the failed austenitic stainless steel bolt. Magnification: 200× Fig. 7 Typical microstructure...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001816
EISBN: 978-1-62708-241-9
.... structural components superplastic deformation boundary sliding dislocation creep high-strength low alloy steel decohesions traction testing grain size elongation Ti-Nb microalloyed ultrafine-grained steel (UGS steel, general) high-strength low-alloy steel (HSLA steel, general) Introduction...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001738
EISBN: 978-1-62708-220-4
... Microscopic Investigations Accelerated Creep Testing Coarse-Grained Zone Replica Technique Cracks in the Manifold Oxidation Notch Ductility Deformation Mechanism Grain Size Deformation Capability Residual Life The results of the chemical analysis of the material from...
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
... bush failure has been shown. The deformation heat treatment reduces wear intensity by 25% at dry friction as compared with the babbit in the cast state. The babbit obtained by plasma spraying has the least wear intensity at dry friction, which is probably connected with the β-phase grain-size...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006774
EISBN: 978-1-62708-295-2
... the fracture of a component of interest in a failure investigation. Details on the mechanisms of deformation, brittle transgranular fracture, intergranular fracture, fatigue fracture, and environmentally affected fracture are also provided. brittle transgranular fracture creep fracture deformation...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003537
EISBN: 978-1-62708-180-1
... Possible improper processing creating denuded zone adjacent to grain boundary River pattern or fan pattern Cleavage fracture; crack runs “down” river; fan rays point to initiation site within a grain (see Fig. 10 ) Tongues Twinning deformation during rapid crack propagation (see Fig. 28...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003545
EISBN: 978-1-62708-180-1
... through recovery events. Creep deformation also produces microstructural changes, such as slip bands, grain-boundary sliding, cavity formation and growth, and cracking (grain boundary, interphase boundary, and transgranular). There are others, some of which are very important. One is in situ...