Results 241 to 250 of about 86,765,181 (296)
Ductile-to-brittle transition in spallation of metallic glasses
Journal of Applied Physics, 2014 In this paper, the spallation behavior of a binary metallic glass Cu50Zr50 is investigated with molecular dynamics simulations. With increasing the impact velocity, micro-voids induced by tensile pulses become smaller and more concentrated. The phenomenon suggests a ductile-to-brittle transition during the spallation process.
X. Huang, Z. Ling, L. H. Dai
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A ductile-to-brittle transition in bone?
Journal of Materials Science, 1974Consideration is given to the possibility that compact bovine femur material undergoes a ductile-to-brittle transition behaviour which is similar in some respects to that which occurs for certain metallic materials. Evidence for this possibility is derived from compressive and tensile bulk strength measurements reported over a range of temperatures and
D. F. Hasson, R. W. Armstrong
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Ductile-to-Brittle Transition in MoSi2
MRS Proceedings, 1992We have studied the mechanical behavior of two fine grained MoSi2 alloys containing 0.61 at% (0.19 wt%) and 0.29 at% (0.09 wt%) oxygen, respectively. By preparing these alloys in almost identical fashion, their only difference was their oxygen content. The mechanical behavior was studied by four-point flexure tests in unnotched specimens between 800°C ...
S. R. Srinivasan +2 more
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Polymer crystallinity and the ductile to brittle transition
Polymer, 2018Abstract The effects of crystallinity and molecular weight on the ductile-brittle transition of a semi-crystalline polyamide were de-coupled. Low molecular weight organic acid solutions were used to accelerate the molecular weight degradation of polyamide-11 to be faster than with water aging at 120 °C.
Samuel J.A. Hocker +3 more
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Ductile-to-brittle transition strain rate
2006 8th Electronics Packaging Technology Conference, 2006Solder joint failure mode depends on factors such as loading mode (shear vs. tensile), temperature, and strain rate. For any given loading mode and temperature, there is a transition from ductile failure to brittle failure as strain rate is increased. This ductile-to-brittle transition strain rate (DTBTSR) is one of the best indicators for robustness ...
Robert Darveaux, Corey Reichman
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A dislocation dynamical theory of the ductile-to-brittle transition
Acta Metallurgica et Materialia, 1995A mesoscopic dislocation dynamics approach is used to describe subcritical crack growth due to transgranular cleavage of semi-brittle materials. From an analysis of the concurrent effects of (i) crack tip dislocation emission, (ii) crack shielding and (iii) propagation of the plastic zone into unyielded material which is applied to a crack loaded in ...
P. Hähner, H. Stamm
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On the ductile-to-brittle transition temperature in MoSi2
Scripta Metallurgica et Materialia, 1992This paper reports that the intermetallic compound MoSi[sub 2] combines excellent oxidation resistance, a high melting point (2020[degrees]C), reasonable strength and density, and good thermal conductivity, making it a promising material for structural applications above 1200[degrees]C.
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On the ductile-to-brittle transition in ice under compression
Acta Metallurgica et Materialia, 1993Abstract Evidence is presented which supports a recent model [Schulson, Acta metall. mater. 38 , 1963 (1990)] of the ductile-brittle transition in ice under uniaxial compression. Observations on columnar, fresh-water ice show that wing cracks from within both the brittle and the ductile regimes, but that individual wing cracks propagate only within
R.A. Batto, E.M. Schulson
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International Journal of Machine Tools and Manufacture, 2015 The mechanism of brittle-ductile cutting mode transition has received much attention over the past two decades. Due to the difficulties in directly observing the cutting zone during the brittle-ductile cutting mode transition by experimental techniques ...
Sandy To, Gaobo Xiao
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On the ductile to brittle transition in austenitic steel
Materials Science and Engineering: A, 1997The fracture mode of austenitic steel may feature a ductile to brittle transition (DBT), depending on alloy composition and temperature. As crack nucleators, intersecting deformation twins play a key role in determining the fracture mode. In particular, brittle fracture occurs at low temperature deformation of high nitrogen steel where twins are very ...
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