VOID INITIATION IN DUCTILE FRACTURE

Published on Nov 1, 1973in Scripta Metallurgica
· DOI :10.1016/0036-9748(73)90250-0
Robert W. Bauer2
Estimated H-index: 2
 (UVA: University of Virginia), H.G.F. Wilsdorf9
Estimated H-index: 9
 (UVA: University of Virginia)
Sources
Abstract
Fracture surfaces of 304 stainless steel were examined with a scanning electron microscope and inter void and inter particle spacings were measured. A significant relationship between inter void spacings and fracture stress was found. It was concluded that voids preceding ductile fracture could be initiated without the presence of secured phase particles in pure metals and 'clean' alloys. (Author)
đź“– Papers frequently viewed together
1974Acta Metallurgica
2 Authors (R.L. Lyles, H.G.F. Wilsdorf)
19591.86Philosophical Magazine
1 Author (K. E. Puttick)
1977Materials Science and Engineering
3 Authors (R.N. Gardner, ..., H.G.F. Wilsdorf)
References2
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#1A.S. TetelmanH-Index: 1
#2A.J. McEvilyH-Index: 1
Jan 1, 1967·Physica Status Solidi B-basic Solid State Physics1.71
#1J. A. Sigler (UVA: University of Virginia)H-Index: 1
#2Doris Kuhlmann-Wilsdorf (UVA: University of Virginia)H-Index: 36
Employing the most accurate theoretical expressions known for the energy of five different types of vacancy condensation products, the relative stabilities of these are evaluated by means of a B 5500 computer. The calculations are performed for the cases of aluminum, nickel, platinum, copper, gold, and silver, while the defects considered are the hexagonal Frank loop on {111} with 1/3 as Burgers vector, two perfect loops with 1/2 Burgers vectors, one of these being hexagonal on {111} the other d...
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Nov 1, 2021·Corrosion Science7.21
#4Bailey Kuehl (UW: University of Wisconsin-Madison)H-Index: 2
Abstract null null Additive manufacturing (AM) is a promising means of production of austenitic stainless steel (SS) parts for hydrogen service. The hydrogen embrittlement resistance of SS 316 L parts manufactured by powder-bed-fed selective laser melting (SLM) and directed energy deposition (DED) was examined using slow strain rate tensile testing. The influence of the hierarchical AM microstructures on mechanical response, microstructural evolution, and void formation were analyzed using multi...
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Aug 2, 2021·Materials3.62
#1Wiktor Wciślik (Kielce University of Technology)H-Index: 5
#2Robert Pała (Kielce University of Technology)H-Index: 5
The paper discusses the basic issues of the local approach to ductile fracture of structural metals, with particular emphasis on the failure due to microvoid development. The mechanisms of nucleation of voids around inclusions and precipitates are characterized. The criteria for the nucleation of voids resulting from cracking of the existing particles or their separation from the material matrix are presented. Selected results of experimental studies and Finite Element Method (FEM) simulations o...
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Apr 1, 2020·Journal of Applied Physics2.55
#1Sara Adibi (A&M: Texas A&M University)H-Index: 8
#2Justin Wilkerson (A&M: Texas A&M University)H-Index: 13
Here, we use molecular dynamics simulations as a tool to investigate vacancy clustering in pure aluminum single crystals. A 1% superconcentration of single vacancies are randomly introduced into an otherwise perfect lattice, and the system is allowed to evolve for 500 ns at an elevated temperature of 728 K. Under these conditions, the individual vacancies rapidly agglomerate into larger clusters to reduce their overall energy. The systems are then subject to mechanical deformation to failure. Th...
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Apr 15, 2019·Computational Materials Science3.30
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Abstract The nanoscale void collapse in single crystal aluminum under 1D and 3D compressions at extremely high strain rate was investigated by molecular dynamics. Our simulations reveal the formation of two intersecting tetrahedrons around the void under 3D compression, rather than the shear dislocation loops under 1D compression. The formed tetrahedrons prevent the continuous growth of the shear dislocation loops, which therefore makes the void collapse slow down. For both 1D and 3D compression...
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Dec 19, 2017·Solid Earth3.34
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Abstract. Establishing models for the formation of well-mixed polyphase domains in ultramylonites is difficult because the effects of large strains and thermo-hydro-chemo-mechanical feedbacks can obscure the transient phenomena that may be responsible for domain production. We use scanning electron microscopy and nanotomography to offer critical insights into how the microstructure of a highly deformed quartzo-feldspathic ultramylonite evolved. The dispersal of monomineralic quartz domains in th...
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Sep 15, 2017·Acta Materialia8.20
#1Philip J. Noell (SNL: Sandia National Laboratories)H-Index: 9
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Abstract In the absence of pre-existing failure-critical defects, the fracture or tearing process in deformable metals loaded in tension begins with the nucleation of internal cavities or voids in regions of elevated triaxial stress. While ductile rupture processes initiate at inclusions or precipitates in many alloys, nucleation in pure metals is often assumed to be associated with grain boundaries or triple junctions. This study presents ex situ observations of incipient, subsurface void nucle...
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Feb 24, 2017·Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science2.56
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#2Robin J. Smith (University of Manchester)H-Index: 2
Last. Andrew H. Sherry (University of Manchester)H-Index: 17
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Type 300 austenitic stainless steel manufactured by hot isostatic pressing (HIP) has recently been shown to exhibit subtly different fracture behavior from that of equivalent graded forged steel, whereby the oxygen remaining in the component after HIP manifests itself in the austenite matrix as nonmetallic oxide inclusions. These inclusions facilitate fracture by acting as nucleation sites for the initiation, growth, and coalescence of microvoids in the plastically deforming austenite matrix. He...
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#1Michihiko NagumoH-Index: 1
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Apr 1, 2014·Acta Materialia8.20
#1M. HatanoH-Index: 1
#2Masanori Fujinami (Chiba University)H-Index: 21
Last. Michihiko Nagumo (Waseda University)H-Index: 23
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Abstract Hydrogen embrittlement of austenitic stainless steels has been examined with respect to deformation microstructures and lattice defects created during plastic deformation. Two types of austenitic stainless steels, SUS 304 and SUS 316L, uniformly hydrogen-precharged to 30 mass ppm in a high-pressure hydrogen environment, are subjected to tensile straining at room temperature. A substantial reduction of tensile ductility appears in hydrogen-charged SUS 304 and the onset of fracture is lik...
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Jun 5, 2013·Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science2.56
#1Brad L. Boyce (SNL: Sandia National Laboratories)H-Index: 44
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The deformation, crack nucleation, coalescence, and rupture process of pure tantalum (99.9 pct) were studied under room temperature quasistatic loading using several in situ and ex-situ techniques including optical metallography, scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and transmission-electron microscopy (TEM). The fracture surface of tantalum forms a ridge-and-valley morphology that is distinct from conventional notions of ductile dimple microvoid coalescen...
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