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Martensite

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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...
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
... 347 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...
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Published: 01 June 2019
Fig. 8 Microstructure of the new cylinder clamping rod showing tempered martensite structure, 3000× More
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Published: 01 June 2019
Fig. 7 Cold deformation and grinding martensite at surface of cam lobe side. Etch: Nital. 200 × More
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Published: 01 June 2019
Fig. 13 Martensite layer on the shell fracture surface in rail 5. More
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Published: 01 December 1992
Fig. 8 Microstructure of “representative” P-110 tempered martensite. 324× More
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Published: 01 December 1992
Fig. 11 Higher-magnification view of untempered martensite shown in Fig. 10 . 2% nital etch. 315×. More
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Published: 01 December 1992
Fig. 12 Fine, tempered martensite observed in core. Compare with coarse, untempered martensite in Fig. 11 . 2% nital etch. 315×. More
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Published: 01 December 1992
Fig. 10 Microstructure near weld joint. Structure of martensite and retained austenite. 5% nital etch. 1000×. More
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Published: 01 December 1992
Fig. 11 Microstructure opposite weld joint. Structure is tempered martensite. 5% nital etch. 1000×. More
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Published: 30 August 2021
Fig. 45 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. Original magnification: 50× More
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Published: 30 August 2021
Fig. 82 Representative surface microstructure consisting of tempered martensite More
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Published: 30 August 2021
Fig. 118 Microstructure is tempered martensite More
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Published: 30 August 2021
Fig. 18 Micrographs of untempered martensite (white) along the exposed surface of the wires. Cracking (arrows in b) was observed in the more brittle untempered martensitic phase. Nital etch More
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Published: 30 August 2021
Fig. 7 Inclusions and a pipelike cavity in tempered martensite of AISI E4340 steel. (a) Original magnification: 100×. (b) Original magnification: 600×. Courtesy of Mohan Chaudhari, Columbus Metallurgical Services More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0047579
EISBN: 978-1-62708-234-1
.... The weld deposits were of type 347 stainless steel, and the flanges were type 304 stainless steel. Metallographic examination of the failed studs revealed that the HAZs contained regions of martensite and that intergranular cracks, which initiated at the stud surfaces during welding, propagated to complete...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001352
EISBN: 978-1-62708-215-0
...Abstract Abstract Repeated failures of high-pressure ball valves were reported in a chemical plant. The ball valves were made of AFNOR Z30C13 martensitic stainless steel. Initial examination of the valves showed that failure occurred in a weld at the ball/stem junction end of austenitic...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0047545
EISBN: 978-1-62708-236-5
... internal reflectors, indicating the presence of slag inclusions and porosity. A low-carbon steel flux-cored filler metal was used in repair welding the crankshaft, without any preweld or postweld heating. This resulted in the formation of martensite in the HAZ. The repair weld failed by brittle fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0048064
EISBN: 978-1-62708-224-2
... in a hardened martensitic zone at the torch-cut surface and had extended up to the coarse pearlite structure beneath the martensitic zone. The fatigue fracture was concluded to have initiated in the brittle martensitic surface while failure was contributed by the 25% overload. As a corrective measure, the coil...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001646
EISBN: 978-1-62708-219-8
... of Z-profile wires on the outer rope layer were abrasion induced and accentuated by arrays of fine transverse cracks that developed on a surface martensite layer. Surface martensite Wire breakage Steel wire rope Abrasive wear Brittle fracture Steel wire ropes of different constructions...