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carbide segregation

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Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001814
EISBN: 978-1-62708-180-1
..., unconsolidated interiors, and carbide segregation and poor carbide morphology are reviewed with illustrations. brittle fracture carbide segregation die failure dies electrical discharge machining failure mechanisms finish grinding heat treatment hot working laps machining mechanical testing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0089429
EISBN: 978-1-62708-223-5
... concluded by the plaintiff's metallurgist that the failed drill was defective as the steel contained nonmetallic inclusions and carbide segregation which made it brittle. It was revealed by the defendant that the twist drill met all specifications of M1 high-speed steel and investigated several other drills...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001655
EISBN: 978-1-62708-220-4
... and not at the surface. Our final conclusion is that localized carbide segregation in the original plate served as preferential corrosion sites for the bacterial attack which developed chloride-induced pits, or anaerobic-induced pits that resulted in leaking of the tanks. Had the tanks been...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001182
EISBN: 978-1-62708-218-1
... scale has flaked off. Furthermore, the rim of the disk was badly damaged by secondary mechanical action. The core of the valve had a very fine austenitic microstructure with precipitations of numerous granular and very fine, mostly rounded carbides and tine segregation bands. A hard alloy facing was...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001833
EISBN: 978-1-62708-241-9
... indicated that the boiler failure was caused by grain-boundary segregation of phosphorous, tin, and nitrogen and the in-service formation of carbide films and granules on the grain boundaries. steam chest fracture high-temperature oxidation chromium alloy steel grain boundary defects scanning...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001775
EISBN: 978-1-62708-241-9
...-containing environments. The resistance of the alloy to HIC decreases significantly with an increase of hardness due to work hardening, with the segregation of phosphorus and sulfur on grain boundaries, as well as with the precipitation of carbides on grain boundaries. Dealloying. [ 5 ] Dealloying or...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001269
EISBN: 978-1-62708-215-0
.... Localized burning from the titanium nitriding was also not observed. The coarse cellular carbide network and carbon segregation resulted from unsufficient hot working of the original bar of material. High speed tool steels require hot working to break apart, refine and homogenize and carbides. The hob...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0047779
EISBN: 978-1-62708-223-5
... unidirectional bending stresses resulting from the nature of operation. Nonmetallic oxide-sulfide segregation was indicated by microscopic examination of the edge of the fracture surface. Both smooth and granular areas were revealed on visual examination of the fracture. The shaft was subjected to a low...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c9001250
EISBN: 978-1-62708-223-5
... extending to the right side of the picture is a broad segregation band. Here the zone-wise less powerful attack of the etchant is the result of the accumulation of alloying elements as well as of carbides in the segregation bands. The increased concentration of alloying elements makes these bands vulnerable...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001116
EISBN: 978-1-62708-214-3
... suggested that chemical segregation contributed to the hard areas. Postweld normalized heat treatment apparently did not sufficiently reduce the hardness of these areas. Oil field equipment, corrosion Pipe, corrosion Sour gas, environment Sulfide stress cracking Sulfides, environment Welded...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001004
EISBN: 978-1-62708-229-7
... of grain boundary phosphorus segregation exhibited a good relationship with ambient temperature Charpy data. The electrochemical polarization kinetic reactivation, EPR, approach, however, proved disappointing in that the overlapping scatter in the minimum current density, Ir, for an embrittled and a...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003507
EISBN: 978-1-62708-180-1
... discusses the types of imperfections that can be traced to the original ingot product. These include chemical segregation; ingot pipe, porosity, and centerline shrinkage; high hydrogen content; nonmetallic inclusions; unmelted electrodes and shelf; and cracks, laminations, seams, pits, blisters, and scabs...
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
.... Carbide segregation Roll failure Sendzimir mill roll Spalling Tempered martensite H13 UNS T20813 Brittle fracture Intergranular fracture References 1. Manganello S.G. and Churba D.R. , Roll Failures and What to Do When They Occur , Iron Steelmaker , Vol 7...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0046981
EISBN: 978-1-62708-218-1
... operating temperature in a corrosive environment. When the microstructure near the stem surface was examined, it was apparent that carbide spheroidization had occurred. Also, there was a coarsening of the carbide network within the austenite grains. The microstructure indicated that the underhead region of...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0089676
EISBN: 978-1-62708-224-2
... 480 °C (900 °F) 4.75 Partial Micrographs of specimens from the as-received link ( Fig. 1c and d ) display a segregated structure of complex carbides (black needlelike phase), (FeMn) 3 C carbides (white-on-white area), and pearlite (gray areas) in an austenite matrix, which accounts for the...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001213
EISBN: 978-1-62708-220-4
... ). This occurs in austentitic steels when they have been annealed at temperatures from 600 to 750° C and carbides have segregated at the grain boundaries; a process favored by cold work prior to annealing. The presence of such precipitates is indicated in Fig. 8 by the strong shading of the grain...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001161
EISBN: 978-1-62708-220-4
... austenitic region. This is usually not the case after welding. In this case the unstable iron carbide may segregate as a transition phase in a zone immediately adjacent to the seam, since this zone is heated to the highest temperature and cooled at the fastest rate. This unstable phase may be transformed...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003505
EISBN: 978-1-62708-180-1
... drill was defective while the other drill was satisfactory. He claimed that failure was a cumulative result of the following defective conditions: the steel contained nonmetallic inclusions that were detrimental to the properties of the drill; the carbide segregation was excessive, causing the drill to...
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
...) Fig. 4 Steel expansion and contraction on heating and cooling Figure 5 shows that the crystal lattice of austenite expands with increasing carbon content ( Ref 1 ). It has been reported that, typically, when a carbide-ferrite mixture is converted to martensite, the resulting expansion due...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006777
EISBN: 978-1-62708-295-2
... grain boundaries completely; discontinuous films are sufficient. Some common examples of IG embrittlement by films or segregation include: Grain-boundary carbide films in steels Iron nitride grain-boundary films in nitrided steels Temper embrittlement of alloy steels by segregation of...