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decohesions

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Published: 01 January 2002
Fig. 37 Decohesion at the particle-matrix interface on grain boundaries of 316 stainless steel that failed by creep More
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Published: 15 January 2021
Fig. 37 Decohesion at the particle-matrix interface on grain boundaries of 316 stainless steel that failed by creep More
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Published: 01 December 2019
Fig. 11 SEM micrograph of the steel tested at 800 °C showing a w-shaped decohesion More
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Published: 01 June 2019
Fig. 11 Decohesion of inclusion/matrix interface More
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Published: 01 December 2019
Fig. 8 Micrograph of a specimen superplastically deformed at 800 °C at a zone close to rupture (15 mm away from it). W-shaped decohesion between ferrite–ferrite–pearlite ( w ), r–r-shaped decohesion between ferrite and pearlite ( rr ), ferrite–pearlite decohesion ( f ), and ferrite–ferrite ( r More
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001380
EISBN: 978-1-62708-215-0
... crack origins which assumed a “thumbnail” shape and displayed surface morphologies which resulted from intergranular decohesion. Many of the crack sites initiated from corrosion pits. Energy dispersive spectroscope performed on areas within the crack initiation site showed the presence of chlorides...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001383
EISBN: 978-1-62708-215-0
... either a fatigue mechanism or ductile overload failure. SEM analysis revealed that the mode of fracture was intergranular decohesion, which indicates an environmental influence in the fracture mechanism. The primary fracture initiated at a thread root and propagated by environmentally-assisted slow crack...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001816
EISBN: 978-1-62708-241-9
... Abstract This paper describes the superplastic characteristics of shipbuilding steel deformed at 800 °C and a strain rate less than 0.001/s. After the superplastic deformation, the steel presents mixed fractures: by decohesion of the hard (pearlite and carbides) and ductile (ferrite) phases...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001838
EISBN: 978-1-62708-241-9
... Abstract Stainless steel pipe (273-mm OD x 8-mm wall thickness) used in the fabrication of large manifolds developed crack-like decohesions during a routine inductive bending procedure. The imperfections, which were found near the outside diameter, were around 3 mm in length oriented...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0089254
EISBN: 978-1-62708-225-9
... of the wedge-shaped middle rings fractured prior to having been fully torqued, preventing the sprocket from being locked to the shaft. “Woody” fracture features, as a result of decohesion between a high volume fractions of manganese sulfide stringers and the matrix, was revealed during examination...
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Published: 01 December 2019
Fig. 10 SEM micrograph of the steel tested at 800 °C showing a r–r-shaped decohesion More
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Published: 01 December 2019
Fig. 12 SEM micrograph of the steel tested at 800 °C showing a ferrite–pearlite (ductile) decohesion More
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Published: 01 December 2019
Fig. 10 Optical micrographs showing typical lath martensitic structure with grain boundary decohesion at prior austenite grain boundaries (magnification 1000×) More
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Published: 01 December 1993
Fig. 4 SEM micrographs of an AM-355 poppet valve sealing surface. (a) A dislodged grain. 570×. (b) Sensitized grain boundaries result in grain boundary decohesion. 1140× More
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Published: 01 December 2019
Fig. 4 Closer view of Fig. 3 . Gaping surface crack. Typical dimensions of this decohesion of material were 3 mm in circumferential direction and 2.5 mm crack depth More
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Published: 01 June 2019
Fig. 6 SEM fractographs of roll sample HSM #9 showing (a) brittle features and small ductile zone as well as decohesion near graphite nodule and (b) essentially brittle area exhibiting intergranular cracking and cleavage steps; magnification 1000× More
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Published: 01 December 2019
Fig. 9 Optical micrographs of capping face of cracked specimen showing ( a ) weld zone, ( b ) HAZ, ( c ) base metal, ( d ) CGHAZ and ( e ) intergranular cracks in CGHAZ and ( f ) intergranular cracks and grain boundary decohesion in CGHAZ (magnification 200×) More
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Published: 15 January 2021
Fig. 34 Microstructure and fracture appearance of type 316 stainless steel tested in creep to fracture at 770 °C (1420 °F) using a 62× MPa (8.95 ksi) load. Time to rupture: 808 h. (a) Optical micrograph showing crack nucleation and growth by decohesion along the carbide/matrix interfaces More
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Published: 01 June 2019
Fig. 1 Overload failure of a bronze worm gear. (a) An opened crack is shown with a repair weld, a remaining casting flaw, and cracking in the base metal. (b) Electron image of decohesive rupture in the fine-grain weld metal. Scanning electron micrograph. 119×. (c) Morphology in the large-grain More
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Published: 01 January 2002
Fig. 6 Overload failure of a bronze worm gear ( example 4 ). (a) An opened crack is shown with a repair weld, a remaining casting flaw, and cracking in the base metal. (b) Electron image of decohesive rupture in the fine-grain weld metal. Scanning electron micrograph. 119×. (c) Morphology More