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interdendritic stress-rupture fracture

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Published: 15 January 2021
Fig. 11 Fracture surfaces of a nickel-base superalloy turbine blade. (a) Secondary electron image 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 More
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
.... Figure 13 shows an example of a heater tube that failed by stress rupture and the microvoids that formed near the fracture surface. Fig. 11 Fracture surfaces of a nickel-base superalloy turbine blade. (a) Secondary electron image of interdendritic stress-rupture fracture at the trailing edge (TE...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000604
EISBN: 978-1-62708-181-8
... carbides located several millimeters beneath the surface. These cracks were caused by a combination of shear stress and the tensile stress due to rebounding. SEM, 2000×. Fig. 108 : Crack path of an imminent near-surface spall. SEM, 1000× (H.W. Leavenworth, Jr., U.S. Bureau of Mines) Fig. 106...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000621
EISBN: 978-1-62708-181-8
... surface, showing several fracture levels, separated by offsets, containing crack arrests. Rupture began at the inside of the cylinder wall and terminated in a pronounced ductile shear lip (at top in Fig. 965 ). Note the secondary stress-corrosion cracks in the inside surface of the wall (at bottom...
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
... a level of ductile behavior; otherwise, once a crack is initiated it would result in instant unstable crack growth, fracturing in a macroscopic brittle manner. Unlike ductile overload, however, fatigue most often initiates and propagates at overall stresses below the yield stress. Dimple-rupture...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006352
EISBN: 978-1-62708-179-5
... and Hunt theory Q&T quenched and tempered k thermal conductivity, strength coef cient, partition r radius coef cient R universal gas constant, radius, electrical resistance, kD permeability coef cient stress ration K slope Rm strength at rupture Kf fatigue notch factor Rp0.2 stress at yield point (0.2...
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
... practical failure investigation. The article describes the effects of mechanical loading on a part in service and provides information on laboratory fracture examination. brittle crack propagation ductile crack propagation embrittlement mixed-mode cracking overload fractures stress concentration...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000613
EISBN: 978-1-62708-181-8
...-overload fractures, impact fractures, microstructure, quench cracking, brittle-in-service failure, hydrogen embrittlement, stress-corrosion cracking, and grain-boundary cracking of tool steel components. These components include diesel engine injector plungers, rivet-heading tools, circular saw blades...
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001051
EISBN: 978-1-62708-161-0
... approximately 60 vol% γ′, such as IN 100 and MAR-M 200. The problems encountered ranged from little longitudinal stress-rupture improvement with IN 100 to the lack of transverse ductility and DS grain-boundary cracking with MAR-M 200. Pioneering work by Martin Metals resulted in the addition of hafnium...
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
... stresses in the material. Flame cutting caused a change in the distribution of the residual stresses, which, aided by low fracture toughness due to the poor quality of the beam, resulted in failure. The failure of the I-beam was probably caused by segregation of carbon, sulfur, and phosphorus within its...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006308
EISBN: 978-1-62708-179-5
... by their strength as-cast in 30.5 mm (1.2 in.) diameter bars. Source: Ref 3 Fig. 14 Typical stress-strain curves in tension for gray iron. Source: Ref 19 Fig. 15 Estimate of free sulfur content as a function of manganese and sulfur concentrations. Source: Ref 13 Fig. 16 Tensile...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006812
EISBN: 978-1-62708-329-4
... the material is stressed above or below any ductile-to-brittle transition temperature below which relatively low-energy fractures can occur. Other degradation mechanisms, such as corrosion and oxidation; stress corrosion; erosion from flowing gases, liquids, and solids; hydrogen damage; creep and stress...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000605
EISBN: 978-1-62708-181-8
... of the piston rod and the threaded end. A secondary crack that follows a machining mark is visible at top center. These surface marks are considered to be areas of local stress concentrations, which led to fatigue cracking. 10× Fig. 160, 161, 162 Fracture of low-carbon steel spring due to a lap...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001834
EISBN: 978-1-62708-181-8
.... The analyst traces these features backward to find the origin or origins. The appearance of these marks on the fracture face is a function of the type of loading, for example, tension, shear, bending, fatigue, or torsion; the nature of the stress system; its magnitude and orientation; the presence of stress...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003538
EISBN: 978-1-62708-180-1
... to the slip plane causes alternate rupture and self-healing of the interatomic bonds, resulting in permanent deformation. A normal stress applied to the body causes only continued separation of atoms and therefore brittle cleavage fracture. Fig. 2 Schematic figure showing the effect of a normal stress...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006775
EISBN: 978-1-62708-295-2
... to be broken to permit successive movement of a dislocation along the slip plane. Similarly, estimations of a cleavage fracture stress versus experimentally determined values indicated need for a model other than simultaneous rupture of all bonds. A contemporary view of cleavage fracture is a sequential...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006835
EISBN: 978-1-62708-329-4
... severe embrittlement in steels, especially those with hardnesses above approximately 40 HRC. High-strength, highly stressed parts can crack and fracture as a result of hydrogen embrittlement. Failure by hydrogen embrittlement is even more likely to occur if high residual tensile stresses are present...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002410
EISBN: 978-1-62708-193-1
... the borides, this is not a desirable phase, for it forms cellular structures at the grain boundary and thus decreases the notch stress-rupture strength. It has also been observed to precipitate intergranularly in a Widmanstätten morphology, reducing strength but not ductility ( Ref 4 ). The σ, μ, and Laves...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003718
EISBN: 978-1-62708-182-5
... of an electrolyte cell at tion is made by using water as a solvent. on a fatigue fracture or stress-corrosion crack- which oxidation occurs. Electrons ow away ing surface that indicate successive positions from the anode in the external circuit. It is arti cial aging. Aging above room temperature. of the advancing...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006266
EISBN: 978-1-62708-169-6
... polycrystalline cast nickel-base superalloys versus temperature Fig. 4 Stress-rupture curves for a 1000 h rupture life of selected nickel-base cast superalloys Fig. 5 Comparison of creep resistance of polycrystalline (PC) and columnar grain directionally solidified (CGDS) castings. (a) Creep...