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The ductile-brittle transition in polycrystalline tungsten
Journal of the Less Common Metals, 1965Abstract The ductile-brittle transition temperature of polycrystalline tungsten was found to be ~ 100°C higher in sintered material than in melted material of coarser grain size and probably higher purity. Whereas the brittle fracture stress of recrystallized swaged single crystals increases with decreasing temperature, no reproducible behaviour was ...
A. Wronski, A. Foukdeux
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Numerical modeling of the ductile-brittle transition
International Journal of Fracture, 2000Numerical studies of the ductile-brittle transition are described that are based on incorporating physically based models of the competing fracture mechanisms into the material's constitutive relation. An elastic-viscoplastic constitutive relation for a porous plastic solid is used to model ductile fracture by the nucleation and subsequent growth of ...
A. Needleman, V. Tvergaard
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1999
All thermoplastic polymers, in common with many metals, are capable of undergoing failure either in a brittle manner, like inorganic glasses, or in a ductile manner producing permanent plastic deformation. The temperature at which this transition occurs is the ductile-brittle transition temperature.
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All thermoplastic polymers, in common with many metals, are capable of undergoing failure either in a brittle manner, like inorganic glasses, or in a ductile manner producing permanent plastic deformation. The temperature at which this transition occurs is the ductile-brittle transition temperature.
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Ductile-brittle transition of thoriated chromium
Metallurgical Transactions, 1972Unalloyed chromium and chromium containing approximately 3 wt pct ThO2 (2.2 vol pct) were prepared from powder produced by a chemical vapor deposition process. When rolled to sheet and tested in tension it was found that the thoriated material had a lower ductile-to-brittle transition temperature (DBTT) than unalloyed chromium.
B. A. Wilcox, N. D. Veigel, A. H. Clauer
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Ductile-brittle transition in metallic glasses
Materials Science and Engineering, 1976Abstract Ductile-brittle behavior in Fe-, Co-, and Ni-based metallic glasses has been investigated. The enhanced embrittlement upon alloying has been attributed partly to the enhancement toward phase separation and to the increase in diffusivity. It is believed that the incomplete d-shell orbitals of the Fe, Co, Cr, and Mo atoms of the glasses lead ...
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Ductile–brittle transition behavior of rolled chromium
Journal of Materials Processing Technology, 2004Abstract The ductile–brittle transition behavior of the rolled chromium was examined by means of the tensile test. The workpieces taken from the as-sintered block were repeatedly rolled with or without the intermediate annealing. The rolling was performed with a reduction of 10% in every pass up to 50 or 85% in total reduction with or without the ...
Y. Harada, M. Ohmori
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Ductile-brittle transition by varying structural size
Engineering Fracture Mechanics, 1985Abstract The transition from brittle to ductile failure is realized by varying the size of polymer specimens. The related variation of the most utilized fracture mechanics parameters is analyzed and explained on the base of physical similitude and dimensional analysis concepts.
CARPINTERI, Alberto +2 more
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A micromechanical analysis of the ductile-brittle transition at a weld
Engineering Fracture Mechanics, 1999Abstract The competition between brittle and ductile modes of failure is analyzed in a weld specimen subject to dynamic transverse loading. Full transient analyses under plane strain conditions are carried out. The material response is characterized by an elastic–viscoplastic constitutive relation for a porous plastic solid, with adiabatic heating ...
A. Needleman, V. Tvergaard
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The influence of crack size on the ductile-brittle transition
Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences, 1988Abstract Simple criteria for brittle and ductile crack extension are applied to the stress and strain fields adjacent to the tip of a crack. They are applied at a specified distance from the crack tip, which should be related to the material’s microstructure.
G. Harlin, John Raymond Willis
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The ductile/brittle transition, is it well posed and determinable
International Journal of Engineering Science, 2021zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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