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heat-resistant alloys

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Published: 01 January 2002
Fig. 8 Heat-resistant alloy clamp for securing the hot air ducting system on fighter aircraft that failed by stress corrosion. (a) Configuration and dimensions (given in inches). (b) Section through the fracture area showing an intergranular crack. Electrolytically etched with oxalic acid. 540 More
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Published: 01 January 2002
Fig. 27 Section through a heat-resistant alloy forging showing a central discontinuity that resulted from insufficient homogenization during conversion. Step machining was used to reveal the location of the rupture; original diameter is at right. More
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Published: 01 January 2002
Fig. 55 Cast heat-resistant alloy HH, type II, showing the effects of long-term exposure to temperatures between 705 and 925 °C (1300 and 1700 °F) More
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Published: 01 January 2002
Fig. 56 Cast heat-resistant alloy HH, type II, showing cracking through intergranular carbides 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
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Published: 30 August 2021
Fig. 31 Cast heat-resistant alloy HH, type II, showing the effects of long-term exposure to temperatures between 705 and 925 °C (1300 and 1700 °F) More
Image
Published: 30 August 2021
Fig. 32 Cast heat-resistant alloy HH, type II, showing cracking through intergranular carbides 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
Image
Published: 30 August 2021
Fig. 15 Section through a heat-resistant alloy forging showing a central discontinuity that resulted from insufficient homogenization during conversion. Step machining was used to reveal the location of the rupture; original diameter is at right. More
Image
Published: 01 June 2019
Fig. 1 Heat-resistant alloy clamp for securing the hot air ducting system on fighter aircraft that failed by stress corrosion. (a) Configuration and dimensions (given in inches). (b) Section through the fracture area showing an intergranular crack. Electrolytically etched with oxalic acid. 540 More
Image
Published: 15 January 2021
Fig. 35 Heat-resistant alloy clamp for securing the hot air duct system on a fighter aircraft that failed by stress-corrosion cracking. (a) Configuration and dimensions of the clamp (given in inches). (b) Micrograph of an intergranular crack in a cross section prepared through the fracture More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001107
EISBN: 978-1-62708-214-3
... based (Cr 23 C 7 and Cr 7 C 3 ). The sooty substance was identified as graphite. Discussion Metal dusting of heat-resistant alloys occurs in carbonaceous atmospheres at temperatures above 425 °C (800 °F), with very high activity in the range of 790 to 845 °C (1450 to 1550 °F)and above 925 °C...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c0046926
EISBN: 978-1-62708-232-7
... Abstract Over a period of about one year, three RA 330 alloy salt pots from a single heat-treating plant were submitted to failure analysis. All of the pots, which had 9.5 mm thick walls, were used primarily to contain neutral salts at temperatures from about 815 to 900 deg C (1500 to 1650 deg...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0091533
EISBN: 978-1-62708-217-4
... DL heat-resisting alloy. The operating temperature of the duct surrounded by the clamp was 425 to 540 deg C (800 to 1000 deg F). The life of the clamp was expected to equal that of the aircraft. Investigation (visual inspection, chemical analysis, hardness testing, and 540x/2700x images etched...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c0046995
EISBN: 978-1-62708-232-7
... of the burners. The tubes had an original wall thickness of 3.0 mm (0.120 in.) and were made of three different alloys: the first was Hastelloy X; the second alloy was RA 333, a wrought nickel-base heat-resistant alloy; and the third was experimental alloy 634, which contained 72% Ni, 4% Cr, and 3.5% Si...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0060144
EISBN: 978-1-62708-234-1
... filled with a nickel catalyst. The tubes were centrifugally cast from ASTM A297, grade HK-40 (Fe-25Cr-20Ni-0.40C), heat-resistant alloy. The tube was concluded after metallurgical inspection to have failed from creep rupture (i.e., stress rupture). A project for detecting midwall creep fissuring...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0048757
EISBN: 978-1-62708-234-1
... surface embrittlement resulted from oxygen absorption which made the surface layers susceptible to cracking under start up and shutdown. Replacement tubes made of a heat-resistant alloy (e.g., Hastelloy C-276) were recommended. Acicular structure Overheating Tubes ASTM B337 grade 2 UNS R50400...
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Published: 01 June 2019
Fig. 1 Reformer-furnace cell from which cast tubes of ASTM A 297, HK-40, heat-resistant alloy were radiographically inspected for the detection of creep fissuring. (a) Schematic of furnace cell showing positions of radiographic sources and films. Dimensions given in inches. (b) Radiograph More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001712
EISBN: 978-1-62708-234-1
... analysis indicated there was a strong possibility that the growth of the roll was a result of volumetric expansion due to nitrogen pickup. Therefore, an experiment was designed to quantify the expansion of heat resistant alloys as a function of increase in nitrogen content. Lai 1 , Smith and Bucklin...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001394
EISBN: 978-1-62708-234-1
... and is apparently a proprietary alloy. High chromium-nickel alloys of this composition mostly find application as heat-resisting alloys. To those of a lower chromium and/or nickel content an addition of molybdenum is usually made in order to improve their corrosion resistance. The pump had been in use...