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nickel-base superalloys

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Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001311
EISBN: 978-1-62708-215-0
... in.) by the combined attack; in the tubes that leaked, of course, the combined attack reduced the wall thickness to the point of breakthough at the weld/base metal interfaces. Electroetched in oxalic acid. 49.4× Abstract Several nickel-base superalloy (UNS N06600) welded heat-exchanger tubes used...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001758
EISBN: 978-1-62708-241-9
... airfoil casting are shown in Fig. 13 . Over time, the internal voiding increases and begin to coalesce, forming the beginnings of an intergranular stress-rupture crack. Another common microstructural observation for stress-rupture events in nickel-based superalloy turbine airfoils is the partial...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003517
EISBN: 978-1-62708-180-1
.... The article discusses metallurgical instabilities of steel-based alloys and nickel-base superalloys. It provides information on several life assessment methods, namely, the life fraction rule, parameter-based assessments, the thermal-mechanical fatigue, coating evaluations, hardness testing, microstructural...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001357
EISBN: 978-1-62708-215-0
... composition: 53.7% Ni, 18 to 20% Cr, 18.2% Co, 3.7% Ti, 3.7% Mo, 2.5% Al, 0.1 to 0.2% Fe, <0.1% Nb, 0.085% C, and 0.006% S. It was concluded that the material was a precipitation-hardening nickel-base superalloy comparable to Udimet 500, Udimet 710, or René 77. This type of alloy is not normally used...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0047621
EISBN: 978-1-62708-229-7
..., and flange and more skillful welding techniques to avoid undercutting and unfused interfaces. Arc welding Combustion chamber Flanges Gas turbine engines Pipe fitting Undercuts Welding defects Inconel 718 (Nickel-base superalloy) UNS N07718 Fatigue fracture Joining-related failures...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006781
EISBN: 978-1-62708-295-2
... is the absolute temperature. Figure 2 provides insight into the effect of temperature on inelastic deformation accumulation. The images are of the external surface of nickel-base superalloy test specimens. Both specimens were monotonically tested to an identical inelastic strain. One specimen was tested at room...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001827
EISBN: 978-1-62708-241-9
... attacks both nickel- and cobalt-based superalloys, e.g., GTD 111 for buckets and FSX414 for nozzles. In the case of buckets, hot corrosion was observed in the form of cavities (local hot corrosion selectively attacking the airfoils of the buckets), which showed the presence of corrosion products...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006787
EISBN: 978-1-62708-295-2
... 980 1795 3 Hastelloy X nickel-base superalloy 1205 2200 3 HX (17Cr-66Ni-bal Fe) 1150 2100 3 (a) Seamless tube. (b) Electric-resistance-welded tube The effects of oxygen concentration and temperature are specific to each alloy. Scale growth rate increases...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001840
EISBN: 978-1-62708-241-9
..., an attempt has been made to find the optimum explosive cladding parameters to avoid the failure of cladding of Inconel 625 and plain carbon steel. bimetal plate shear failure impact energy nickel-base superalloy carbon steel plastic deformation shear testing adhesion strength Inconel 625 (nickel...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003555
EISBN: 978-1-62708-180-1
... Hastelloy X nickel-base superalloy 1205 2200 1 HX (17Cr-66Ni-bal Fe) 1150 2100 1 (a) Seamless tube. (b) Electric resistance welded tube Iron oxides alone are not protective above 550 °C (1020 °F) ( Ref 5 ). Chromium, aluminum, and/or silicon assist in forming scales, which...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0090181
EISBN: 978-1-62708-229-7
...-base superalloy Fatigue fracture Metalworking-related failures This case history builds on the cracked gas turbine blades shown in Fig. 1 , 2 , 3 . Cracking was found to initiate from a mechanism of LCF. Low-cycle fatigue is induced during thermal loading cycles in gas turbines (each cycle...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006780
EISBN: 978-1-62708-295-2
... (such as lead, tin, and high-purity aluminum) can deform by creep at or a little above room temperature. In contrast, refractory body-centered cubic metals (such as tungsten and molybdenum) and nickel-base superalloys require temperatures near 1000 °C (1830 °F) to activate the onset of creep deformation...
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
... deform by creep at or a little above room temperature. In contrast, refractory body-centered cubic metals (such as tungsten and molybdenum) and nickel-base superalloys require temperatures near 1000 °C (1830 °F) to activate the onset of creep-deformation engineering significance. Typical materials...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001818
EISBN: 978-1-62708-241-9
... thickness. Damage/burst appears to be caused because of high temperature deformation and corrosion. fire tube sleeve rupture oxidation corrosion nickel-base superalloy metal loss wall thinning grain coarsening stereomicroscopy temperature Incoloy 800 (nickel-base superalloy) UNS N08800 ...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006807
EISBN: 978-1-62708-329-4
... on the material and the operating/testing conditions. For example, it is known that very high-creep-strength (low-creep-ductility) materials such as nickel-base superalloys may spend a significant portion of their creep life in the primary creep regime ( Ref 22 , 23 ). In such cases, a fully constitutive model...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001829
EISBN: 978-1-62708-241-9
...-strengthened superalloy. While Haynes 188 has lower cobalt and carbon contents than ECY 768, it has higher nickel and tungsten contents for solid-solution strengthening. Based on the EDS line profiles across bond-coat/substrate interface, the authors suggest that the composition differences between two cobalt...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006824
EISBN: 978-1-62708-329-4
... and power turbines and, in some cases, the aft-most stages of the compressor. Therefore, creep-resistant nickel and cobalt-base superalloys are typically used for components in these high-temperature regions of the gas turbine. There are multiple mechanisms by which creep manifests in a material...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001824
EISBN: 978-1-62708-241-9
... stainless steel for the failed bolts where large austenite grains are pronounced. In contrast, the intact nut showed small equiaxed grains (deformed grains) typical of nickel-base superalloy, as shown in Fig. 6 and 7 , respectively. It is clear that the cracks initiated from the bottom of corrosion...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006838
EISBN: 978-1-62708-329-4
... in the build. The types of microstructures also may vary. For example, the AM microstructure of Ti-6Al-4V, the most popular titanium alloy, is similar to the wrought product. In contrast, the AM microstructure of the nickel-base superalloy Inconel 718, a popular superalloy, appears to be a cross between...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001328
EISBN: 978-1-62708-215-0
... of Fe-Ni-base superalloys. Such precipitates can be put back into solution through solution-anneal heat treatment. Grain boundary oxidation products were identified through EDS as consisting mostly of chromium with smaller levels of aluminum, silicon, titanium, manganese, iron, and nickel...