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Cleavage

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Published: 31 August 2017
Fig. 12 Examples of cleavage fractures. (a) Twist boundary, cleavage steps, and river patterns in a Fe-0.01C-0.24Mn-0.02Si alloy that was fractured by impact. (b) Tongues (arrows) on the surface of a 30% Cr steel weld metal that fractured by cleavage. Source: Ref 8 More
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Published: 31 August 2017
Fig. 13 Cleavage fracture in Armco iron showing a tilt boundary, cleavage steps, and river patterns. Transmission electron microscopy (TEM) p-c replica. Source: Ref 8 More
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Published: 01 January 1987
Fig. 12 Examples of cleavage fractures. (a) Twist boundary, cleavage steps, and river patterns in an Fe-0.01C-0.24Mn-0.02Si alloy that was fractured by impact. (b) Tongues (arrows) on the surface of a 30% Cr steel weld metal that fractured by cleavage More
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Published: 01 January 1987
Fig. 13 Cleavage fracture in Armco iron showing a tilt boundary, cleavage steps, and river patterns. TEM p-c replica More
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Published: 01 January 1986
Fig. 9 Berg-Barrett topographs of a Vickers hardness indentation on MgO cleavage surface. (a) (022) reflection. (b) (202) reflection. Both 45×. Source: Ref 17 More
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Published: 01 January 2006
Fig. 19 Transgranular cracking (due to cleavage) resulting from stress-corrosion cracking of Ti-6Al-4V in methanol (transmission electron microscopy p-c replica; original magnification: 2000×) More
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Published: 01 December 2008
Fig. 6 Cleavage fracture in a heavy-section ductile iron casting. Original magnification: 200×. Courtesy of Stork Technimet, Inc. New Berlin, WI More
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Published: 01 December 2008
Fig. 7 Mixture of cleavage fracture and ductile rupture (arrows) in a low-alloy steel casting. Original magnification: 1000×. Courtesy of Stork Technimet, Inc. New Berlin, WI More
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Published: 01 December 2008
Fig. 10 Quasi-cleavage in a heavy-section low-alloy steel casting. Original magnification: 1000×. Courtesy of Stork Technimet, Inc. New Berlin, WI More
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Published: 01 January 2002
Fig. 10 River lines on a cleavage fracture surface. Direction of growth is parallel to the direction of crack coalescence as indicated by the arrow. Cracks must reinitiate at a boundary containing a twist (mode III) deformation component. More
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Published: 01 January 2002
Fig. 27 Likelihood of twinning and cleavage for the three common lattices (fcc, bcc, and hcp). An increase in strain rate or a decrease in temperature increases the likelihood of twinning. The fcc metals twin only with difficulty and generally do not fracture by cleavage. See text More
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Published: 01 January 2002
Fig. 29 Mechanical twins likely nucleated by cleavage crack propagation in a Fe-Cr-Mo alloy. Specimen taken from high strain rate, expanded tubing. Nomarski contrast illumination. Source: Ref 44 More
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Published: 01 January 2002
Fig. 31 Fans. (a) Examples of fans in a two-stage TEM replica of a cleavage fracture surface of iron. The river lines point back to the crack initiation site. (b) Fans on SEM image. Source: Ref 44 , 46 More
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Published: 01 January 2002
Fig. 33 Cleavage fracture in a soda lime glass. Crack progresses from left to right. (a) Fracture surface shows the initiation region (featureless mirror region), mist surrounding the mirror region and hackle. (b) Geometry of tensile test showing position of fracture surface normal to tensile More
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Published: 01 January 2002
Fig. 34 Microscale quasi-cleavage fracture in an O1 tool steel tested at room temperature. Predominantly cleavage cracking with patches and ribbons of microvoid coalescence. Source: Ref 35 More
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Published: 01 January 2002
Fig. 45 Second-phase cleavage fracture in Ti-6Al-4V. (a) Light micrograph of polished and etched surface. (b) SEM of fracture surface. Source: Ref 10 More
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Published: 01 January 2002
Fig. 47 Cyclic cleavage observations in Fe-4Ni (at.%) at 233 K, Δ K = 17 MPa m (15.5 ksi in. ). (a) Jogs formed during cyclic stepping across grain. (b) Large number of cleavage rivers formed to accommodate the twist angle misorientation between two grains. (c) Cleavage More
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Published: 01 January 2002
Fig. 48 Scanning electron micrographs of cyclic cleavage of Fe-4Si (at.%) at 233 K, Δ K = 18.4 MPa m (16.7 ksi in. ). (a) Overload cleavage appearance at 75×. (b) Magnifications at 750× shows brittle striations on large cleavage river More
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Published: 01 January 2002
Fig. 3 Dislocation models for cleavage fracture. (a) Elastic crack regarded as a pileup of edge dislocations. (b) Pileup against a boundary forming a crack. (c) Crack forming by movement of dislocations on two slip planes. (d) Crack formation at tilt boundary. Source: Ref 4 More
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Published: 01 January 2002
Fig. 57 Quasi-cleavage fracture in a low-carbon steel tested at −196 °C (−320 °F). (a) Tensile specimen. (b) Torsion (mode III) specimen. Etch pitting indicated that the fracture plane was {100}. Source: Ref 72 More