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void growth

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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
.... , FE Simulation of the Punching Process Using In-Process Characterization of Mild Steel , J. Mater. Proc. Technol. , Vol 134 , 2003 , p 296 – 302 28. ABAQUS Version 6.2, User's Manual, Hibbitt Karlsson and Sorensen Inc. 29. Tvergaard V. , Material Failure by Void Growth , Adv...
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: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002352
EISBN: 978-1-62708-193-1
... sites of second-phase and nondeforming particles Void growth at the locations of fracture nucleation. Growth by plastic deformation processes. By void linkup via ductile microrupture or shearing Extensive Fig. 3 Fracture mechanism maps for fcc, bcc, and hcp metals, alkali halides...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009003
EISBN: 978-1-62708-185-6
.... (a) Void initiation at hard particles. (b) Void growth. (c) Void linking Fig. 15 Effect of volume fraction of second-phase particles on the tensile ductility of steel. Source: Ref 13 The second stage of ductile fracture is void growth, which is a strain-controlled process. Voids elongate...
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
... geometry stress raisers stress-strain behavior twinning unnotched specimen void growth ALTHOUGH FRACTURE can be apparently brittle at the macroscale (without visible distortion), the fracture process at the microscale can be brittle, ductile, alternating, or mixed, as discussed in the preceding...
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
... of pore (incipient crack) formation at or in a particle, followed by either void growth and linkage or by localized shear band slip deformation in the intervoid ligaments. The mechanisms of void nucleation and void coalescence are briefly described, together with associated microscale and macroscale...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003545
EISBN: 978-1-62708-180-1
... and intergranular cracking in a jet-engine turbine blade. Courtesy of J. Schijve The most common form of microstructural change is the accumulation of nucleation and growth of voids. Void growth is well understood, because voids grow by the same mechanisms that cause creep deformation. In contrast, void...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004017
EISBN: 978-1-62708-185-6
... the Cockcroft-Latham criteria has the advantage of mathematical simplicity, it is sometimes criticized as not having a physical basis and of not being sensitive to the hydrostatic state of stress. The Oyane criteria, while being more complex, is based on a void growth model of failure and contains a term for σ...
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
... in a tensile test), but now become triaxial (i.e., tensile stresses in the three primary directions of space). If ductile fracture via microvoid coalescence is reconsidered, the elevated stress and strain fields may accelerate the nucleation of secondary voids. The void growth rate will also increase...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0009078
EISBN: 978-1-62708-177-1
... , 1983 , p 135 – 169 10.1177/002199838301700204 5. Kardos J.L. , Dudukovic M.P. , and Dave R. , Void Growth and Resin Transport during Processing of Thermosetting-Matrix Composites , Epoxy Resins and Composites IV, Advances in Polymer Science , Vol 80 , Springer, Berlin...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006780
EISBN: 978-1-62708-295-2
..., such as void formation, the precipitation of new phases, dissolution or growth of desired phases, grain growth, and so on. A sharp change of slope in a rupture life curve can occur from metallurgical instabilities, such as TG-IG fracture transition, recrystallization, aging or overaging (phase...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005461
EISBN: 978-1-62708-196-2
.... , and Bringa E.M. , The Role of Dislocations in the Growth of Nanosized Voids in Ductile Failure of Metals , J. Met. , Feb 2009 , p 35 – 41 At that time, ductility was primarily expressed through measurements of elongation and reduction of area in a tension test. Ongoing testing and everyday...
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
... fracture toughness ( Fig. 9 ) by promoting crack nucleation by inclusion fracture, void nucleation at the particle-matrix interface, and early coalescence. This reduces the extent of void growth before fracture, limiting the plastic energy absorption in the process zone at the crack tip. A decrease...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009004
EISBN: 978-1-62708-185-6
... and quantitative description of the relationship between material and process parameters. Some examples of the application of the workability analysis procedures already described follow. Microscopic observations of void growth and coalescence along planes of maximum shear leading...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0009071
EISBN: 978-1-62708-177-1
... J.C. , Pelton T. , and Wilhelm M. , Analysis and Characterization of Prepreg Tack , Polym. Compos. , Vol 13 , 1992 , p 197 10.1002/pc.750130308 8. Kardos J.L. , Dudukovic M.P. , and Dave R. , Void Growth and Resin Transport during Processing of Thermosetting...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005421
EISBN: 978-1-62708-196-2
... state. The remainder of this section, therefore, deals with the modeling of cavity growth under both uniaxial and multiaxial stress conditions. Cavity coalescence refers to the stage at which voids link together, leading to final fracture. In most models, cavity coalescence/linkage...
Book Chapter

By Bruce Craig
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003634
EISBN: 978-1-62708-182-5
... it combines to form molecular hydrogen. As the concentration of hydrogen increases at these microstructural discontinuities, a high internal pressure is created that enhances void growth or initiates cracking. This model, although apparently reasonable for blistering and possibly appropriate for some aspects...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001834
EISBN: 978-1-62708-181-8
... depends on the number of nucleation sites and the plasticity of the material. If many nucleation sites are present, void growth is limited, because the dimples will intersect and link up. This produces many small, shallow dimples. If very few nucleation sites are present, there will be small number...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009005
EISBN: 978-1-62708-185-6
... state on cavitation. (a) Dependence of the void growth factor, D , on the ratio of the mean to effective stress ( σ m / σ ¯ ). Source: Ref 38 , Ref 39 . (b) Comparison of measured and predicted values of the ratio of the cavity growth parameter at the center and edge (η c /η e ) of Ti...
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
... 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 the transient period, while their growth and coalescence occur during steady state. Void nucleation is aided by small amounts of dissolved...