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bainite

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c0090959
EISBN: 978-1-62708-222-8
...Abstract Abstract Mower blades manufactured from grade 1566 high-manganese carbon steel failed a standard 90 deg test. The blades had been austempered and reportedly fractured in a brittle manner during testing. The austempering treatment was intended to produce a bainitic microstructure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c0048674
EISBN: 978-1-62708-222-8
... a bainitic structure and the method of plating the fastener with zinc was changed from electroplating to a mechanical deposition process to thus avoid hydrogen embrittlement. Fasteners, corrosion Electroplating Lawn furniture 1060 UNS G10600 Surface treatment related failures Hydrogen damage...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0048289
EISBN: 978-1-62708-234-1
.... The microstructure near the rupture edge was revealed by metallographic examination to consist of ferrite and acicular martensite or bainite. The microstructure and the observed lack of cold work indicated a temperature above the transformation temperature of 727 deg C had been reached. Swelling of the tubes...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001196
EISBN: 978-1-62708-224-2
... inspection, 200x micrographs, chemical analysis, and metallographic examination) supported the conclusion that the primary cause of the failure was the brittleness (lack of impact toughness) of the steel. The coarse bainitic microstructure was inadequate for the service application. The microstructure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001159
EISBN: 978-1-62708-232-7
... pipe had become coarse-grained and acicular, and the microstructure of the welding seam had become predominantly martensitic as a result of the mixing of the weld metal with the fused pipe material. The chrome steel pipe had become partially transformed to martensite or bainite at the transition...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047830
EISBN: 978-1-62708-235-8
... surface was identified around one of the folds and a fatigue crack initiated in the fold and propagated across the cheek. Properties representative of 4140 steel, quenched and tempered to a hardness of 20 to 22 HRC, were observed. Tempered bainite was revealed in the general microstructure...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001811
EISBN: 978-1-62708-241-9
... to be homogenous and had no banded structure. However, x-ray diffraction analysis confirmed the presence of up to 6% retained austenite which likely caused the tube to buckle during the 910 °C heat treating procedure. tube buckling retained austenite bainitic steel distortion x-ray diffraction analysis...
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
... steel having a mixed structure of martensite and bainite . Metall. Trans. A. 16 , 73 – 82 ( 1985 ) 10.1007/BF02656714 Selected References Selected References • Vander Voort G.F. , Failures of Tools and Dies, Failure Analysis and Prevention , Vol 11 , ASM Handbook , Becker...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001791
EISBN: 978-1-62708-241-9
... compared with sample 1, as indicated in Fig. 4 . When fracture occurred, the inner wall (not fractured), previously not exposed to hot gas flux, started to receive directly this flux. As a consequence, in this site, pearlite lost its typical lamellar aspect and was transformed predominantly in bainite...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001711
EISBN: 978-1-62708-229-7
.... This proves that a localized softening led to a fall in resistance. Figure 6 shows an area right next to the fracture: a great globulization of the original bainitic structure is apparent. On the other hand, around the outside of the pipe, globulization is clearly smaller and the bainitic structure remains...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001784
EISBN: 978-1-62708-241-9
... of fractured steel surface may have served as void-nucleating sites. Elemental mapping showed Al and S that are inclusion constituents have potentially played a role in fracture of the wrench socket. Optical microscopy of the failed socket indicated feathery bainite microstructure that is expected...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001823
EISBN: 978-1-62708-241-9
... with martensite and/or bainite. The presence of martensite/bainite indicates heating of the metal followed by rapid cooling. The hardness and microstructure of the base metal for away from the perforation are consistent with this vintage and grade of line pipe steel. There was no evidence of external...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001245
EISBN: 978-1-62708-232-7
... consisted of very fine acicular martensite with fine spherical carbide inclusions ( Fig. 6 ) up to a depth of 5–6 mm. The martensite indicated no signs of tempering treatment. Adjoining the purely martensitic peripheral zone was a transition zone with increasing amount of bainite and pearlite from...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0048795
EISBN: 978-1-62708-220-4
... of bainite and austenite having a hardness (1-kg load) of 426 to 460 HV. Elsewhere, the structure of the HAZ was coarse and jagged bainite with a hardness of 313 to 363 HV. Examination of a section transverse to the weld disclosed that the structure of the flange forging contained pronounced banding...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003510
EISBN: 978-1-62708-180-1
..., a relatively hard transformation product; and to achieve the desired as-quenched hardness. The most common transformational products that may be formed from austenite in quench-hardenable steels are, in order of formation with decreasing cooling rate: martensite, bainite, pearlite, ferrite, and cementite...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0047817
EISBN: 978-1-62708-233-4
... extrusion, the weld zone was almost undetectable. A metallographic specimen taken from near the fracture surface showed that the microstructure of the metal at the inner surface contained acicular ferrite and bainite, indicative of decarburization ( Fig. 1b ) The microstructure of the metal...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001611
EISBN: 978-1-62708-219-8
... , were observed in the metallographic views. Of particular interest, the weld HAZ microstructure was also examined to evaluate the relative cooling rate during welding. The HAZ microstructure is shown in Fig. 4 and consists of ferrite, pearlite, and minor amounts of martensite (or perhaps bainite...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001167
EISBN: 978-1-62708-228-0
... that both corrosion fatigue and stress corrosion may have contributed to the initial stage of slow crack growth. Sections for optical micro-examination taken from areas both adjacent to and remote from the fracture had similar micro-structures consisting of upper bainite together with grains...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001362
EISBN: 978-1-62708-215-0
... of tempered martensite and bainite. Fig. 3 The typical bulk microstructure observed in the disc is shown at two different magnifications. The microstructure consists of tempered martensite and bainite. Crack Origins/Paths Samples representing the typical damage were sectioned from the turbine...
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
.... Fig. 3 Micrograph showing the intergranular morphology of the crack surfaces. 630× Metallographic cross sections of the turbine disk were prepared for examination. The resultant microstructure was bainitic, typical for quenched and tempered nickel-chromium-molybdenum-vanadium steels ( Fig. 4...