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grain-boundary cracks

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Published: 01 December 1989
Fig. 3.17. Grain-boundary crack-nucleation mechanisms: (a) triple-junction cracking; (b) cavitation at particles ( Ref 87 ). More
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Published: 01 July 2009
Fig. 1.8 Typical examples of grain-boundary cracking in creep tests (dark areas are voids at grain boundaries). (a) Evidence of grain-boundary activity in an aluminum specimen after 210 h creep under a stress of 19 MPa (1.4 ton/in. 2 ) at 250 °C (480 °F). Original magnification 150×. Source More
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Published: 01 August 2005
Fig. 2.83 Models illustrating how intergranular cracks form due to grain-boundary sliding. Source: Ref 2.55 More
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Published: 01 December 2018
Fig. 6.59 SEM micrographs for (a) inner-edge fracture surface showing grain boundary fissures, 500×; and (b) post-metallography sample showing discontinuous grain boundary cracks, 1000× More
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Published: 01 December 2018
Fig. 6.31 SEM micrograph (a) at OD near crack, 2000×; and (b) at OD but away from crack, showing scattered creep cavities and grain boundary cracking, 2000× More
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Published: 01 July 2009
Fig. 1.12 Two types of creep cracks found in grain boundaries: (a) w-type cracks and (b) r-type cracks. Source: Ref 1.24 More
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Published: 01 December 2018
Fig. 6.54 SEM micrograph of waterwall tube showing intergranular nature of brittle fracture with discontinuous fissures and grain boundary cracking, 1000× More
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Published: 01 August 2005
Fig. 2.84 Micrograph showing intergranular cracking due to grain-boundary sliding. Source: Ref 2.51 More
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Published: 01 September 2008
Fig. 22 Intergranular crack formation at high temperature by grain-boundary sliding at (a) triple points and (b) inclusions More
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Published: 01 August 2018
Fig. 10.62 Quench crack in prior austenitic grain boundaries. During heating for quenching there was excessive austenitic grain growth. Etchant: nital 2%. Courtesy of M.M. Souza, Neumayer-Tekfor, Jundiaí, Brazil. More
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Published: 01 August 2018
Fig. 16.5 Crack following prior austenitic grain boundaries in AISI 410 steel subjected to corrosion testing according to NACE TM 0177 standard. Courtesy of A. Zeemann, Tecmetal, Rio de Janeiro, Brazil. More
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Published: 31 December 2020
Fig. 21 Quench cracks due to excessively large grain boundaries resulting from excessively high austenitizing temperature. Note cracking patterns associated with prior coarse austenite grain boundaries. Source: Ref 25 More
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Published: 01 September 2008
Fig. 11 Ferrite vein crack occurring in the prior-austenite grain boundaries of weld metal deposited on A709-grade 50W More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430149
EISBN: 978-1-62708-253-2
... ( Fig. 6.7b ). Fig. 6.7 Microstructures at (a) fracture lip having elongated ferrite grains with coagulated carbides and scattered creep cracks at ferrite grain boundaries, 100×; and (b) OD surface near fracture lip showing ferrite and coagulated carbides having fissures filled with scales, 400...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060043
EISBN: 978-1-62708-343-0
.... To distinguish these voids from all others, we designate them as slip voids. Fig. 3.6 Schematic illustration of detailed deformation model for CC-type loading cycle. Source: Ref 3.3 In addition, triple-point cracking can be created during the process of accommodating grain-boundary sliding. Local...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090001
EISBN: 978-1-62708-266-2
... of a surface film. It describes bulk and surface reactions that contribute to SCC, including dissolution, mass transport, absorption, diffusion, and embrittlement, and their role in crack nucleation and growth. It also discusses crack tip chemistry, grain-boundary interactions, and the effect of stress...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930329
EISBN: 978-1-62708-359-1
... alloys in terms of grain boundary precipitation, grain growth, and hot cracking in the heat-affected zone; fusion zone segregation and porosity; and postweld heat treatments. Next, the article analyzes the welding characteristics of dissimilar and clad materials. This is followed by sections summarizing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060001
EISBN: 978-1-62708-343-0
... creep curves creep fatigue creep rupture testing creep strain cyclic loading deformation maps grain-boundary cracking CREEP is time-dependent deformation that occurs at high temperature relative to the melting point of metallic materials. The creep regime for metals is commonly regarded...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310027
EISBN: 978-1-62708-286-0
... aqueous environments. stainless steel uniform corrosion atmospheric corrosion localized corrosion pitting corrosion crevice corrosion grain boundary corrosion stress corrosion cracking hydrogen embrittlement biocorrosion microbiologically induced corrosion Summary STAINLESS STEEL...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410499
EISBN: 978-1-62708-265-5
... as shown an embrittled austenite grain boundary, initiated fatigue fracture in specimens quenched from the austenite field. In specimens reheated to the austenite-cementite field, fatigue cracks were initiated at pits produced by the chemical polishing. A study of fatigue crack origins in a steel...