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void nucleation

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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
... and fracture. Next, the mechanisms of void nucleation and void coalescence are briefly described. Macroscale and microscale appearances of ductile and brittle fracture are then discussed for various specimen geometries (smooth cylindrical and prismatic) and loading conditions (e.g., tension compression...
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Published: 01 December 2009
Fig. 5 Total number density of all voids in an Al-Mg-Cu-Mn superplastic alloy as a function of strain at various temperatures and strain rates, showing that voids nucleate continuously during deformation More
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Published: 31 August 2017
that serve as void-nucleating sites. Source: Ref 8 More
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Published: 01 January 1987
. Brooks, University of Tennessee). (b) Large and small sulfide inclusions in steel that serve as void-nucleating sites. (R.D. Buchheit, Battelle Columbus Laboratories) More
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Published: 01 January 2005
Fig. 9 Nucleation of grain-boundary voids (cavitation) and triple-point cracks at warm and hot working temperatures. (a) Schematic illustration showing how grain-boundary voids are formed under the action of matrix deformation and how grain-boundary sliding in the absence of grain-boundary More
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005458
EISBN: 978-1-62708-196-2
... nucleation cracklike interface cavities cavity growth large-faceted cavities cavity initiation creep cavitation superplastic deformation hot deformation process modeling THE FORMATION AND GROWTH of internal voids in metallic alloys are of considerable concern in components produced...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003254
EISBN: 978-1-62708-176-4
... interfacial strength, and the matrix flow strength influence the mechanism of void formation. In general, void nucleation by particle cracking is favored by increasing particle size, higher interfacial strengths, and the presence of nonequiaxed particles. By contrast, void nucleation by interfacial decohesion...
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
... by a process referred to as MVC, where voids nucleate (initiate), grow, and coalesce to develop the final fracture surface that is dimpled. The most common process is one of pore (incipient crack) formation at or in a particle, followed by either void growth and linkage or by localized shear band slip...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005528
EISBN: 978-1-62708-197-9
.... The finite-element simulation was conducted with the ABAQUS code ( Ref 28 ), incorporating the Gurson-Tvergaard-Needleman (GTN) models ( Ref 29 , 30 ) for modeling ductile fracture by void nucleation, growth, and coalescence. The GTN models are quite effective in modeling ductile failure and are discussed...
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Published: 01 January 1996
throughout the material, and subsequently grow and coalesce by means of plastic deformation processes. Voids are nucleated frequently at inclusions but may also be formed in regions of intense, heterogeneous slip. Void linkup is restricted to the necked region of the tensile sample. Source: Ref 7 More
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Published: 01 January 1996
Fig. 8 Large voids in AISI 4340 linked by narrow void sheets consisting of small microvoids. (a) Section through the necked region of a 4340 steel specimen showing the formation of a voids sheet between two voids formed at larger inclusions. (b) Schematic of nucleation at smaller particles More
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002379
EISBN: 978-1-62708-193-1
... Impurities (P, S, As, Sn) Decrease K Ic by temper embrittlement Sulfide inclusions and coarse carbides Decrease K Ic by promoting crack or void nucleation High carbon content (>0.25%) Decrease K Ic by easily nucleating cleavage Twinned martensite Decrease K Ic due to brittleness...
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Published: 01 January 1987
Fig. 93 Regions of fatigue precracking (at right) and crack extension or fracture (at left) in the fracture surface of a ferritic ductile iron compact tension specimen. Note how crack ignores nodules in fatigue and grows almost exclusively through nodule-nucleated voids during ductile fracture More
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Published: 01 January 2002
generated due to the nucleation and growth of void(s) around the constituent particles present in the recrystallized grains. More
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Published: 01 January 2002
cracks in a soft matrix. (g) Ductile intergranular striations. (h) Particle nucleated ductile intergranular voids. (i) Discontinuous intergranular facets. Source: Ref 31 More
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Published: 15 January 2021
cracks in a soft matrix. (g) Ductile intergranular striations. (h) Particle nucleated ductile intergranular voids. (i) Discontinuous intergranular facets. Source: Ref 8 More
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001286
EISBN: 978-1-62708-170-2
... crystallographic orientation density film growth growth-related properties interface formation intermetallic materials lattice defects nucleation nuclei growth physical vapor deposition reactive deposition residual film stress surface area surface coverage transport vaporization voids...
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001036
EISBN: 978-1-62708-161-0
... on the swelling behavior of type 316 stainless steel irradiated in a fast reactor (EBR-II). Source: Ref 3 The high rate of swelling in the steady-state regime (∼1%/dpa) suggested that the structural lifetime could be increased only by extending the transient regime ( Ref 4 , 5 ). Voids nucleate during...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006323
EISBN: 978-1-62708-179-5
...). An additional fracture mode, very often identified in cast iron failures, is quasi-cleavage. Each fracture mode has a distinctive crack propagation mechanism. Dimple rupture is typical of ductile metals that fail as the result of nucleation, growth, and coalescence of microscopic voids that initiate...
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
... to) grain boundaries from conditions such as creep cavitation or void nucleation at precipitates in the grain boundaries. The term IG brittle fracture is used when the grain surface does not have dimples indicative of microvoid coalescence. In some cases, the term decohesive rupture has been used...