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Single-crystal superalloys

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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
... at carbides and other microconstituents, especially in single crystal castings that do not possess grain boundaries. gas turbine engine components creep deformation overheating nickel-base superalloy interdendritic stress-rupture fracture stress-rupture testing stress-rupture life Cast nickel...
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
.... 2 Inelastic damage (in the form of slip) manifesting on the surface of a single-crystal nickel-base superalloy after an identical monotonic load was applied at (a) 25 °C (75 °F) and (b) 650 °C (1200 °F). Source: Ref 3 Fig. 4 Cross section of a nickel-base superalloy after...
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
... of Cobalt, Tantalum, and Tungsten on the Microstructure of Single Crystal Nickel-Base Superalloy , Metall. Trans. A , Vol 16 , 1985 , p 1849 10.1007/BF02670372 114. Collins H.E. , The Effect of Thermal Exposure on the Microstructure and Mechanical Properties of Nickel-Base Superalloys...
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
... Deformation mechanism map for the cast nickel-base superalloy MAR-M200 with a grain size of 100 μm. Source: Ref 3 The formation of cavities (voids) on the grain boundaries during creep is brought about by migration of crystal lattice defects and/or the grain-boundary sliding process ( Ref 4...
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
...-solidification (DS) and single-crystal (SC) alloys were developed to increase high-temperature strength and minimize failures. Directional-solidification alloys for gas turbine blades have columnar crystals grown with their long axes parallel to the length of the airfoil, which is the direction of principal...
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
... solidification or single crystal production, or applying a compressive strain on the outer surface of a alloy component by peening or similar process. Frequent cycling may reduce the design life of high-temperature components from that predicted for operation at steady state. Cyclic temperature conditions...
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
... of interdendritic stress-rupture fracture at the trailing edge (TE) of single-crystal turbine blade casting showing creep voids on the fracture surface. (b) Scanning electron microscopy backscatter electron image of stress-rupture cracks and wrinkled aluminide coating on concave trailing-edge side of single-crystal...
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
... surface of the sleeve in the shape of honey comb and crystal like pattern ( Fig. 6 ). Such a pattern suggests that significant grain growth occurred during service. Fig. 6 Stereomicrograph of damaged sleeve showing honey comb-like surface Samples were cut from damaged and undamaged section...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006826
EISBN: 978-1-62708-329-4
.... Min S. , Lee D.-E. , de Grave A. de Oliveira Valentede C.M. , Lin J. , and Dornfeld D.A. , Surface and Edge Quality Variation in Precision Machining of Single Crystal and Polycrystalline Materials , Proc. Inst. Mech. Eng. B, J. Eng. Manuf. , Vol 220 , 2006 , p 479...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003543
EISBN: 978-1-62708-180-1
... or brittle overload failures and the resultant fracture morphology are influenced by various material factors from the atomic level to the bulk material level. The inherent macroscopic ductility of crystalline materials, for example, depends on factors such as the specific crystal lattice that is present...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003533
EISBN: 978-1-62708-180-1
...-Scatter Diffraction Patterns for the Determination of Crystal Symmetry Elements , Scanning Electron Microsc. , 2 , 1986 , p 386 3. Newbury D. , Joy D. , Echlin P. , Fiori C. , and Goldstein J. , Advanced Scanning Electron Microscopy , Plenum Press , New York , 1986...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006769
EISBN: 978-1-62708-295-2
... Diffraction Patterns for the Determination of Crystal Symmetry Elements , Scanning Electron Microsc. , Vol 2 , 1986 , p 386 3. Picard Y.N. , Scanning Electron Microscopy , Materials Characterization , Vol 10 , ASM Handbook , ASM International , 2019 , 10.31399/asm.hb.v10.a0001767 4...
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
... , 1971 , p 907 – 908 10.1007/BF02662754 23. Kakehi K. , Effect of Primary and Secondary Precipitates on Creep Strength of Ni-Base Superalloy Single Crystals , Mater. Sci. Eng. A , Vol 278 (No. 1–2 ), 2000 , p 135 – 141 10.1016/S0921-5093(99)00579-1 24. Wilshire B...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006778
EISBN: 978-1-62708-295-2
... of crystal lattices occurs as a result of bonding between atoms. Strong bonding forces between atoms cause atoms to pack efficiently (high packing densities). These arrangements exhibit planes of high atomic density, which contain close-packed directions. This results in the three lattices (fcc, bcc, and hcp...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003539
EISBN: 978-1-62708-180-1
... of unnotched high-purity metals and alloys has shown that repeated plastic deformation can result in localization of permanent microstructural changes. For example, under inelastic cyclic loading, bands of intense slip known as persistent slip bands form in individual crystals of pure fcc metals...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006776
EISBN: 978-1-62708-295-2
...: Careful laboratory study of unnotched high-purity metals and alloys has shown that repeated plastic deformation can result in localization of permanent microstructural changes. For example, under inelastic cyclic loading, bands of intense slip known as persistent slip bands form in individual crystals...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003537
EISBN: 978-1-62708-180-1
... ) and the distinctive river lines of cleavage for brittle cracking ( Fig. 10 ). The occurrence and appearances of these TG cracking mechanisms are influenced by crystal structure, microstructure, loading rate, and temperature, as briefly discussed later in this article and in more detail in the article “Mechanisms...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006756
EISBN: 978-1-62708-295-2
... depressions Mottled appearance Needlelike iron-rich crystals Sodium-rich deposits Rounded depressions Intergranular cracking Chloride sometimes present in deposit Rounded depressions Thick grayish deposit of NaFePO 4 (maricite) at metal surface covered by black and white deposits No intergranular cracks...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003552
EISBN: 978-1-62708-180-1
... layer held between the open lattice of phosphate crystals on the steel part surface. The microcrystalline structure of the phosphate is very delicate and can be easily damaged by the conveyor systems commonly used in the coating process lines. Most phosphate lines go directly from the phosphating...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006784
EISBN: 978-1-62708-295-2
... to migrate and reside at many nonmetallic inclusion boundaries (boundaries of internal “impurities” such as sulfides or oxides) or at imperfections (dislocations) in a crystal lattice. It has been well known for decades that proper postplating baking of electroplated parts can minimize the occurrences...