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retained austenite

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0047307
EISBN: 978-1-62708-223-5
.... The microstructure consisted of eutectic chromium carbides (Cr7C3) in a matrix of retained austenite and martensite intermingled with secondary carbides. Analysis (visual inspection and 500x view of sections etched with Marble's reagent) supported the conclusion that the low hardness resulted from an excessive...
Image
Published: 01 December 2019
Fig. 3 XRD scan showing the peak of retained austenite More
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Published: 01 January 2002
Fig. 33 Volume fraction of retained austenite in carbon steels fully austenitized and water quenched in water or brine at room temperature. Source: Ref 11 More
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Published: 30 August 2021
Fig. 22 Retained austenite in 1018 steel carbonitrided at three different temperatures. Bar 28.5 mm (1.12 in.) in diameter quenched in 55 °C (130 °F) oil. More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0092148
EISBN: 978-1-62708-235-8
... retained austenite in the failed cylinder to transform to martensite. The increase in volume resulted in sufficient size distortion to cause interference between the cylinder and the spool, seizing, and loss of flow control. The failed parts had been carburized in a process in which the carbon potential...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0046044
EISBN: 978-1-62708-235-8
.... Chemical analysis of the cracked metal showed a slightly higher level of carbon than in the component that did not crack. X-ray diffraction studies of material from the fractured dome showed a very low level of retained austenite, and chemical analysis showed a slightly higher content of carbon...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001535
EISBN: 978-1-62708-232-7
.... Microstructural issues influencing roll quality, such as characteristics of carbides, tempered martensite, retained austenite, etc., have been extensively studied through optical and scanning electron microscopy, electron-probe microanalysis, image analysis, and x-ray diffractometry. These are discussed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047187
EISBN: 978-1-62708-225-9
... of the teeth that came into contact with the opposing gear during engagement. The microstructure at the periphery of a worn tooth at its unworn side consisted of coarse acicular martensite with a large percentage of retained austenite. Pinion Failure: The teeth of the pinion exhibited severe spalling...
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
... Fig. 3 XRD scan showing the peak of retained austenite Fig. 4 Surface of the tube showing fine grain size Fig. 5 Molybdenum-rich inclusions observed in the material Fig. 6 Changes in impedance measured at the circumference of the tube with schematic of the tube showing...
Book Chapter

Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0090947
EISBN: 978-1-62708-225-9
... that the fracture occurred via brittle overload, which was predominantly intergranular. The amount of bending evidence and the directionality of the core overload fracture features suggest that the applied stresses were not purely axial, as would be anticipated in this application. The level of retained austenite...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001209
EISBN: 978-1-62708-224-2
... an unkilled carbon-deficient steel, and were case hardened to a depth of 0.8 to 0.9 mm. The peripheral structure at the places not showing wear consisted of coarse acicular martensite with a high percentage of retained austenite. The links therefore were strongly overheated, probably directly heated during...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0047964
EISBN: 978-1-62708-223-5
... of the grinding machine was reconditioned to eliminate the undulations and retained austenite was minimized by careful heat treatment. Bevel gears Cracks Gear boxes Magnetic particle testing Spalling Surface grinding 8620 UNS G86200 Rolling-contact wear The service life of a production gearbox...
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Published: 01 January 2002
Fig. 11 Cross sections through the carburized 1117 steel cylinders from two spool-type hydraulic valves. The cylinder of the valve that operated satisfactorily (a) had little retained austenite in the case, whereas the cylinder of the seized valve (b) had much retained austenite More
Image
Published: 01 June 2019
Fig. 1 Cross sections through the carburized 1117 steel cylinders from two spool-type hydraulic valves. The cylinder of the valve that operated satisfactorily (a) had little retained austenite in the case,whereas the cylinder of the seized valve (b) had much retained austenite that transformed More
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Published: 30 August 2021
Fig. 16 (a) AISI O1 tool steel ring forging that cracked during quenching. The forging was overaustenitized (unstable retained austenite was present) and was decarburized to a depth of approximately 0.5 mm (0.020 in.). Temper color was present on the crack walls. (b) Interior microstructure More
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Published: 30 August 2021
Fig. 12 Effect of austenitizing temperature on structure of 1% C steel. (a) Quenched from 1000 °C (1830 °F). Coarse martensite plates (gray) and retained austenite (white). Vickers hardness of 745. (b) Quenched from 750 °C (1380 °F). Spheroidized carbides (white) in a fine martensite matrix 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
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001532
EISBN: 978-1-62708-232-7
... such as martensite, retained austenite, and carbides. Microhardness [Vickers pyramid number (VPN)] measurements were concurrently carried out on different phases to corroborate their identity. For determining the microhardness of hard martensite and carbide phases, a 50 g indenting load was applied, while a lower...
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Published: 01 January 2002
Fig. 30 Light micrograph of overaustenitized AISI O1 tool steel containing coarse plate martensite and substantial unstable retained austenite. Specimen etched with nital More
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Published: 01 June 2019
Fig. 3 Nital-etched microstructure of roll HSM #8 showing acicular martensite with retained austenite at needle interstices and white carbide phase exhibiting microcracking; magnification 500× More