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alloy phases

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Published: 01 June 2019
Fig. 3 Fe-Cr alloy phase diagram 15 More
Image
Published: 01 January 2002
Fig. 57 Sigma (σ) phase in cast heat-resistant alloy HH, type II. Intermetallic phases, such as σ, can greatly reduce the ductility of many high-temperature alloys in service at temperatures from 480 to 955 °C (900 to 1750 °F). More
Image
Published: 30 August 2021
Fig. 33 Sigma (σ) phase in cast heat-resistant alloy HH, type II. Intermetallic phases, such as σ, can greatly reduce the ductility of many high-temperature alloys in service at temperatures from 480 to 955 °C (900 to 1750 °F). More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001609
EISBN: 978-1-62708-229-7
...% Cr ferritic alloy 405 with 0.08% C is not. 1 , 2 Fig. 3 Fe-Cr alloy phase diagram 15 Similar to standard 18Cr-8Ni austenitic stainless steels, Cr and C in these Cr-Fe ferritic alloys react to form Cr carbide precipitates when heated to 315 to 925 °C (600 to 1700 °F). Precipitates...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c0046956
EISBN: 978-1-62708-232-7
... diffused into the nickel-base alloy and formed a grain-boundary phase that was molten at the operating temperature. The presence of this phase caused localized liquefaction and weakened the alloy sufficiently to allow formation of the holes. No recommendations were made. Brazing furnaces Grain...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c0091757
EISBN: 978-1-62708-232-7
... the chemical makeup of these phases. Fig. 1 Sulfidation and chloridation attack on nickel alloy of charcoal-regeneration kiln. See also Fig. 2 . Region 1 is an area of chromium sulfide islands (dark phase) interspersed in chromium-depleted region (bright phase). Region 2 has angular phase (consisting...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001439
EISBN: 978-1-62708-235-8
... Abstract Persistent leakage was experienced from copper tube heaters which formed part of dairy equipment. Metallurgical examination of the brazed joints showed them to have suffered a preferential corrosion attack. This resulted in the phosphide phase of the brazing alloy being corroded away...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001224
EISBN: 978-1-62708-232-7
... phase. The sigma phase consists of an intermetallic compound of approximately 50 at. % Cr which forms from the solid solution during slow cooling or during extended annealing below 800°to 900°C (depending upon the other components of the alloy). The formation of sigma phase is accompanied by a decrease...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c0090971
EISBN: 978-1-62708-222-8
... overload fracture due to excessive iron-zinc phase and gross porosity. These conditions acted synergistically to reduce the strength of the material. The composition was nonstandard, and the inherent brittleness suggested that it was unlikely that this material was an intentional proprietary alloy...
Image
Published: 15 January 2021
Fig. 7 Sulfidation and chloridation attack on IN-601 nickel-base alloy of charcoal-regeneration kiln (see also Fig. 8 ). Region 1 is an area of chromium sulfide islands (dark phase) interspersed in a chromium-depleted region (bright phase). Region 2 has an angular phase (consisting mostly More
Image
Published: 01 January 2002
Fig. 7 Sulfidation and chloridation attack on nickel alloy of charcoal-regeneration kiln. See also Fig. 8 . Region 1 is an area of chromium sulfide islands (dark phase) interspersed in chromium-depleted region (bright phase). Region 2 has angular phase (consisting mostly of nickel sulfide More
Image
Published: 01 June 2019
Fig. 1 Sulfidation and chloridation attack on nickel alloy of charcoal-regeneration kiln. See also Fig. 2 . Region 1 is an area of chromium sulfide islands (dark phase) interspersed in chromium-depleted region (bright phase). Region 2 has angular phase (consisting mostly of nickel sulfide More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001685
EISBN: 978-1-62708-235-8
... Abstract The U-0.8wt%Ti alloy is often used in weapon applications where high strength and fairly good ductility are necessary. Components are immersion quenched in water from the gamma phase to produce a martensitic structure that is amenable to aging. Undesirable conditions occur when...
Image
Published: 15 January 2021
Fig. 8 Sulfidation and chloridation attack on IN-601 nickel-base alloy of charcoal-regeneration kiln at higher magnification (~44×). Lower right is region of chromium sulfide islands (dark phase) interspersed in chromium-depleted region (bright phase). Middle region has an angular phase More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001123
EISBN: 978-1-62708-214-3
... phase to attain a stable structure. Fig. 2 As-polished specimen of zinc-aluminum alloy Eutectic and proeutectic areas are shown. Black β-zinc precipitates inside proeutectic areas are β-Zn. Enhancement of aluminum and the presence of lead segregations at the grain boundaries can be seen...
Image
Published: 01 January 2002
Fig. 8 Sulfidation and chloridation attack on nickel alloy of charcoal-regeneration kiln, with greater magnification (at ∼44×). Lower right is region of chromium sulfide islands (dark phase) interspersed in chromium-depleted region (bright phase). Middle region has angular phase (consisting More
Image
Published: 01 June 2019
Fig. 2 Sulfidation and chloridation attack on nickel alloy of charcoal-regeneration kiln, with greater magnification (at ∼44×). Lower right is region of chromium sulfide islands (dark phase) interspersed in chromium-depleted region (bright phase). Middle region has angular phase (consisting More
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001772
EISBN: 978-1-62708-241-9
... Abstract A cast silicon bronze (UNS C86700) impeller that had been severely corroded was submitted for failure analysis. The failed part was used to pump potable water, but service life and chlorine content of the water were unknown. The impeller displayed a Cu-rich red phase on its surfaces...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0046737
EISBN: 978-1-62708-229-7
... Abstract After 14 months of service, cracks were discovered in castings and bolts used to fasten together braces, posts, and other structural members of a cooling tower, where they were subjected to externally applied stresses. The castings were made of copper alloys C86200 and C86300...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003545
EISBN: 978-1-62708-180-1
... steels. These alloys are widely used for their creep resistance, but they are not immune to reduced rupture life due to overaging. Intermetallic-Phase Precipitation Topologically close-packed phases (commonly known as tcp), such as sigma, mu, and Laves phases, form at elevated temperatures...