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intergranular brittle cracking

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Published: 01 January 1987
Fig. 540 Brittle intergranular fracture of AISI 9254 due to quench cracking. The crack initiated at a seam, 0.15 mm (0.006 in.) deep. The seam wall is the irregularly textured area at top in the fractograph. SEM, 200× (J.H. Maker, Associated Spring, Barnes Group Inc.) More
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006777
EISBN: 978-1-62708-295-2
... a case history on IG fracture of steam generator tubes, where a lowering of the operating temperature was proposed to reduce failures. dimpled intergranular fracture grain boundaries hydrogen embrittlement intergranular brittle cracking intergranular fatigue intergranular stress-corrosion...
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
... and metallurgical phenomena can impose brittle fracture characteristics on materials that would generally evince the more desirable ductile overload behavior. Brittle overload failures are typically differentiated by a primary crack that occurs from either transgranular or intergranular crack propagation, which...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003540
EISBN: 978-1-62708-180-1
... on the mechanical and microstructural that influence crack path, see Table 3 in the article “Fracture Appearances and Mechanisms of Deformation and Fracture.” ) Intergranular Brittle Cracking Causes of IG brittle fracture include: Brittle second-phase particles and/or films in grain boundaries...
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
...• Single crack with no branching• Surface slip band emergence • Cleavage or intergranular fracture• Origin area may contain an imperfection or stress concentrator • Progressive zone: worn appearance, flat, may show striations at magnifications above 500ו Overload zone: may be either ductile or brittle...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000626
EISBN: 978-1-62708-181-8
... the brittle fracture, transgranular fracture, intergranular fracture, and crack propagation of the tungsten carbide. brittle fracture cemented carbides four-point bending test fractograph intergranular fracture tungsten carbide Fig. 1273 Eta phase on the fracture surface of a 94WC-6Co alloy...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000612
EISBN: 978-1-62708-181-8
... fracture, low-cycle and high-cycle fatigue fracture, fracture surface, brittle intergranular fracture, hydrogen embrittlement, and intergranular stress-corrosion cracking of stainless steel components of these steels. The components include high-pressure compressor parts, springs, deflector yokes...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000610
EISBN: 978-1-62708-181-8
... candy fracture, cleavage fracture, brittle fracture, high-cycle fatigue fracture, fatigue striations, hydrogen-embrittlement failure, creep crack propagation, fatigue crack nucleation, intergranular creep fracture, torsional overload fracture, stress-corrosion cracking, and grain-boundary damage...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000609
EISBN: 978-1-62708-181-8
... Abstract This article is an atlas of fractographs that helps in understanding the causes and mechanisms of fracture of ASTM/ASME alloy steels and in identifying and interpreting the morphology of fracture surfaces. The fractographs illustrate the solidification cracking, creep failure, brittle...
Image
Published: 01 January 1996
transgranularly or intergranularly brittle intergranular fracture, BIF. (b) Mode II brittle fracture is preceded by microscopic, but not microscopic, plastic deformation. Indeed, plastic deformation nucleates cracks that may propagate by cleavage or in an intergranular mode (as shown schematically). (c More
Image
Published: 15 January 2021
Fig. 23 Deformation and fracture maps for (a) magnesium and (b) magnesium oxide. Mode 1, 2, and 3 represent regions of brittle fracture mechanisms (cleavage or intergranular fracture) with the following conditions: region 1, preexisting cracks propagate; region 2, slip or twin-nucleated cracks More
Image
Published: 01 January 2003
Fig. 9 Ductile and brittle fracture morphologies resulting from LMIE. (a) Fracture surface produced by subcritical cracking in D-6ac steel (tempered at 650 °C, or 1200 °F) in liquid mercury showing predominantly dimpled intercrystalline fracture along prior-austenite grain boundaries. (b More
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
... steel with hardness of 255 HB. Note that pronounced 45° shear deformation has produced shear lips and also numerous secondary cracks, which formed at pores. 7.5× Fig. 124, 125, 126 Brittle intergranular fracture of cast AISI 1025 collar for the emergency crank handle on a dam crane. Part failed...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005342
EISBN: 978-1-62708-187-0
... (Intergranular Brittle Fracture) Hydrogen-assisted cracking, also called hydrogen embrittlement, can occur with carbon and low-alloy steels that have been exposed to an environment where hydrogen is generated at the surface of the part. This can be from pickling or plating operations or may occur from...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003633
EISBN: 978-1-62708-182-5
... macroscopic evidence of mechanical deformation in metals and alloys that are normally quite ductile. Crack propagation can be either intergranular or transgranular; sometimes, both types are observed on the same fracture surface. Crack openings and the deformation associated with crack propagation may be so...
Image
Published: 15 January 2021
Fig. 11 Brittle fractures. (a) Fracture of mild carbon steel below the ductile/brittle transition temperature. Note the appearance of river lines on the faces of the cleavage surfaces. (b) Fracture of a soda-lime glass. Note similarity of river lines to those of (a). (c) Intergranular stress More
Image
Published: 15 January 2021
Fig. 35 Centrifugal pump shaft (Example 21). (a) Image of the rough pump shaft fracture surface. (b) Electron image showing intergranular fracture surface. Original magnification: 274×. (c) Shaft cross section showing branching intergranular cracking of brittle fracture. Original magnification More
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
..., highly reflective surface indicates brittle cracking by cleavage or intergranular fracture. In addition, when intergranular fracture occurs in coarse-grained materials, individual equiaxed grains have a distinctive rock-candy appearance that may be visible with a hand lens. Surface roughness provides...
Image
Published: 01 January 1987
Fig. 401 TEM p-c replica taken at the root of the quench crack, marked A, in Fig. 397 , and the beginning of the impact fracture, marked B there. At left are the last vestiges of intergranular cracking, and at right is the beginning of quasi-cleavage cracking in this very brittle specimen More
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006760
EISBN: 978-1-62708-295-2
... dimples Brittle Failures Brittle failures do not show necking or elongation. The fracture surface can be transgranular/cleavage or intergranular, depending on the material and conditions ( Fig. 6 ). Fig. 6 (a) Brittle fracture of cast aluminum tensile bar. (b) Brittle fracture...