1-20 of 125 Search Results for

retained austenite

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
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
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.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
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...
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
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...
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...
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
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...
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
... microstructure phase transformations quenching quench-process design residual stress retained austenite steel stress tempering HEAT TREATING—of all the various steel processing methods—has the greatest overall impact on control of microstructure, properties, residual stresses, and dimensional...
Image
Published: 01 December 1992
Fig. 10 Microstructure near weld joint. Structure of martensite and retained austenite. 5% nital etch. 1000×. More
Image
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
Image
Published: 01 June 2019
Fig. 5 Nital-etched microstructure of roll HSM #1 showing acicular martensite with retained austenite at needle interstices and white carbide phase exhibiting pronounced microcracking; magnification 500× More
Image
Published: 01 June 2019
Fig. 4 Nital-etched microstructure of roll HSM #14 showing acicular martensite with retained austenite at needle interstices, white carbide phase, and dark-gray graphite nodule; magnification 500× More
Image
Published: 01 June 2019
Fig. 1 Microstructure of a cast iron breaker bar that suffered premature wear. The structure is eutectic chromium carbide (Cr 7 C3) in a matrix of retained austenite and martensite. Some patches of martensite are intermingled with secondary carbides. Etched with Marble's reagent. 500× More
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006818
EISBN: 978-1-62708-329-4
... of retained austenite present. In some cases, it is necessary to perform simulations or to conduct experimental heat treatments to determine if a part was tempered. Chemical analysis of millings or turnings from the surface will define variations in surface-carbon content. Electron metallographic devices...
Image
Published: 01 June 2019
Fig. 1 Forged 1.60Mn-5Cr steel gear and pinion that failed in service because of improper carburization. (a) Gear showing irregular wear on teeth. (b) Microstructure on the periphery of a gear tooth on the unworn side showing coarse martensite and large amounts of retained austenite (white More