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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047566
EISBN: 978-1-62708-235-8
... stainless steel filler metal to form a fillet between the handle and the cover. The structure was found to contain a zone of brittle martensite in the portion of the weld adjacent to the low-carbon steel handle; fracture had occurred in this zone. The brittle martensite layer in the weld was the result...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c0047694
EISBN: 978-1-62708-219-8
... martensite present in the weld area after the heat treatment. The test failures of the AISI 1080 steel wire butt-welded joints were due to martensite produced in cooling from the welding operation that was not tempered adequately in postweld heat treatment, and to poor wire-end preparation for welding...
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Published: 01 January 2002
Fig. 45 A typical example of freshly formed martensite at the tip of a failed shear blade. The hardness was 59 to 60 HRC. Etched with 3% nital. 50× More
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Published: 01 January 2002
Fig. 21 Cross-sectional view of a white layer of martensite produced by fretting of a carbon steel connecting rod. Axial stress, 0 to 380 MPa (0 to 55 ksi); contact stress, 40 MPa (6 ksi); fretting cycles, 10 5 . Sample was nital etched and viewed with scanning electron microscopy (SEM). More
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Published: 01 January 2002
Fig. 27 Light micrograph showing epsilon martensite at the surface of a decarburized (less than 0.5% C) austenitic manganese steel specimen. Etched with 2% nital/20% sodium metabisulfite More
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Published: 01 January 2002
Fig. 12 Inclusions and a pipelike cavity in tempered martensite of AISI E4340 steel (Example 4). (a) 100×. (b) 600×. Courtesy of Mohan Chaudhari, Columbus Metallurgical Services More
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Published: 01 January 2002
Fig. 3 Crystal structures. (a) Austenite (fcc). (b) Ferrite (bcc). (c) Martensite (bct) More
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Published: 01 January 2002
Fig. 46 Micrograph of AISI 8630 steel as quenched. The microstructure is martensite, where cracking initiated from a rolling seam. Source: Ref 27 More
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Published: 01 January 2002
Fig. 65 Retained austenite (white) and martensite in the surfaces of carburized and hardened nickel-chromium steel testpieces. (a) Approximately 40% retained austenite. (b) Approximately 15% retained austenite. Both 550×. Source: Ref 30 More
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Published: 01 December 1993
Fig. 7 Representative micrograph of microstructure showing tempered martensite. 1% nital. 1000× More
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Published: 01 December 1993
Fig. 8 Representative tempered martensite microstructure of the pitch horn bolt. 245× More
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Published: 01 December 1993
Fig. 4 Closeup view of a pore in a matrix of tempered martensite. 378× More
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Published: 01 December 1993
Fig. 8 Microstructure of load cell, showing tempered martensite containing carbides and/or ferrite. Etched with Kelling's reagent More
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Published: 01 December 1993
Fig. 5 Higher magnification view showing tempered martensite, sulfide stringer inclusions and carbide networking. 315×. More
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Published: 01 December 1993
Fig. 2 White etching bands of untempered martensite that intersected the face and chamfer of the hammer in a zone away from the chipped area. A crack is present in one of the bands. 34.65×. More
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Published: 01 December 1992
Fig. 6 Crack initiation site, showing untempered martensite. More
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Published: 01 December 1992
Fig. 9 Microstructure of the spindle, showing tempered martensite with some ferrite. Nital etch, 100×. More
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Published: 01 December 1992
Fig. 7 Representative microstructures (quenched and tempered martensite) of the cap screws. Nital etch. (a) 126×. (b) 504×. More
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Published: 01 December 1992
Fig. 2 Microstructure of the tie rod. Tempered martensite with spheroidized carbide. 250×. More
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Published: 01 December 1992
Fig. 8 Microstructure of “representative” P-110 tempered martensite. 324× More