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bainite

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Published: 01 December 2019
Fig. 19 The onset of bainite shows up as a deep etching structure in axle 2 (nital etch) More
Image
Published: 01 December 2019
Fig. 3 ( a , b ) Optical micrograph of failed socket showing bainite phase ( a ) as compared with that of a better quality unfailed socket showing martensite phase ( b ) at the same magnification (Etchant: 2% Nital) More
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 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...
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Published: 01 June 2019
Fig. 5 Upper bainitic structure with aligned grains of unresolved pearlite (black). 100 × More
Image
Published: 01 June 2019
Fig. 2 Coarse bainitic structure of steel in condition as received, etched with Nital. 200 × More
Image
Published: 01 December 2019
Fig. 5 Manganese sulfide inclusions ( arrows ) present in a hardened, bainitic microstructure More
Image
Published: 01 December 1993
Fig. 4 Micrograph showing the bainitic microstructure of the turbine disk. Picral etch. 315× More
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
... 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 to the weld. Thus...
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
... hydrogen. It was revealed that fasteners treated in this manner were brittle due to hydrogen embrittlement as the baking process was found to not be able to remove all the nascent hydrogen which had induced during acid cleaning and electroplating. The heat treatment cycle was modified to produce a bainitic...
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
..., 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 resulted...
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
... 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. As a corrective measure...
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
... was studied at 4 KHz. Figure 6 demonstrates the change in eddy current response at different locations of the tube. The impedance values are plotted around the circumference of the tube, whereas, each curve has been taken along the tube axis. 28Cr3SiNiWMoV steel is a bainitic steel which during furnace...
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Published: 01 June 2019
Fig. 7 Microstructure of roll. Transverse section, etch: Picral, 500× Transition zone (martensite with bainite). More
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Published: 01 December 1992
Fig. 9 Microstructure of the axle core, composed of ferrite and pearlite (and perhaps bainite). 2% nital etch. 450×. More
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Published: 01 December 1993
Fig. 3 The typical bulk microstructure observed in the disc is shown at two different magnifications. The microstructure consists of tempered martensite and bainite. More
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Published: 01 December 1992
Fig. 7 Micrograph of the same area shown in Fig. 6 after etching in nital. Matrix microstructure is bainite with scattered carbides. 64×. More
Image
Published: 01 December 1993
Fig. 5 Microstructure at fracture surface. Arrow A indicates region of tempered martensite. Arrow B indicates mixture of tempered martensite and bainite. Nital etch. 64× More
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Published: 01 December 2019
Fig. 9 Sample 3 (area near the fracture/severe oxidation): inner wall on the side of exposure to the hot gas flux. Microstructure: martensite, bainite, and ferrite with carbide precipitation More
Image
Published: 01 December 1993
Fig. 4 Microstructure in the remote rings of (a) Tube 3 and (b) Tube 4. The microstructures consist of ferrite and bainite, and the dark spots are graphite. Nital etchant. (a) 308×. (b) 616×. More