Results 251 to 260 of about 1,255,886 (301)

Ductile-to-brittle transition strain rate

2006 8th Electronics Packaging Technology Conference, 2006
Solder 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, 1995
A 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, 1992
This 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, 1993
Abstract 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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On the ductile to brittle transition in austenitic steel

Materials Science and Engineering: A, 1997
The 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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Ductile-to-brittle transition in cenosphere-filled polypropylene composites

Journal of Materials Science, 2010
Cenosphere-filled polypropylene (PP) composites were fabricated and characterized for their structural/morphological and fracture mechanical behaviour. The fracture properties were studied following the essential work of fracture (EWF) approach based on post-yield fracture mechanics (PYFM) concept.
Bhabani K. Satapathy, Arijit Das, Amar Patnaik   +2 more
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Ductile to brittle transition in the Zr41.2Ti13.75Cu12.5Ni10Be22.5 bulk metallic glass

Intermetallics, 2006
Abstract The variation of impact toughness, Γ, of a Zr41.2Ti13.75Cu12.5Ni10Be22.5 (Vitreloy-1) bulk metallic glass (BMG) within the temperature range of 123–423 K was evaluated by using an instrumented Charpy impact testing machine, in order to examine if the BMGs exhibit ductile-to-brittle transition (DBT) that is seen in rapidly quenched glasses ...
R. Raghavan, P. Murali, U. Ramamurty
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Factors affecting the shape of the ductile-to-brittle transition

International Journal of Pressure Vessels and Piping, 2002
Abstract This paper uses a statistical model of cleavage fracture to examine the effect of various material parameters on the mean toughnesses of ferritic steels in the transition region. Individually, changes in the flow properties, in the effective surface energy, and in the distribution of particles from which cleavage is initiated, all affect the
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Orientation-dependent ductile-to-brittle transitions in nanostructured materials

Acta Materialia, 2008
Strengths of materials close to the upper theoretical limit have been observed in a number of recent experimental studies. The dimensions of the samples have been on the micron length scale and the strength is conferred by the absence of flaws. Below a critical length scale crystalline materials can sustain stresses near the theoretical strength ...
Ralph D. Nyilas, Ralph Spolenak
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Size-Scale Transition from Ductile to Brittle Failure

2021
With the scientific advances of the last few decades in the field of Material Mechanics it has been realized that the traditional concept of strength, understood as force per unit surface causing fracture, is in need of revision, especially in the cases where particularly large or particularly small structures are involved. The strength of the material
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