Results 151 to 160 of about 40,760 (208)

Ductile-brittle transition in steels at near-solidus temperatures

Metal Science and Heat Treatment, 2006
A complex study of the nature of the little-investigated phenomenon of high-temperature brittleness of steels, i.e., the ductile-brittle transition observed in the temperature range t = (0.92–0.98)tmelt, is described. Regular features in the behavior of mechanical properties of low-alloy steels in this temperature range are considered.
V. V. Zabil’skii, R. M. Nikonova
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Polypropylene-elastomer (TPO) nanocomposites: 3. Ductile-brittle transition temperature

Polymer, 2012
Abstract Izod impact strength was determined as a function of temperature for polypropylene (PP)/ethylene-co-octene elastomer (EOR) blends and nanocomposites to determine the effect of PP molecular weight, elastomer MFI, EOR octene content and MMT content on the ductile-brittle (D-B) transition temperature.
Rajkiran R. Tiwari, D.R. Paul
openaire   +1 more source

Variation of ductile-brittle transition temperature with grain size

Strength of Materials, 1977
1. The variation of the ductile-brittle transition temperature with grain size is determined not only by the temperature dependence of the yield strength but also by the temperature dependence of the surface energy of brittle cracks. 2.
N. L. Kareta, V. G. Mazur
openaire   +1 more source

Constraint Effect on Fracture in Ductile-Brittle Transition Temperature Region (Report 3)

Volume 1: Codes & Standards, 2023
Abstract In order to predict fracture behavior in the ductile-brittle transition temperature (DBTT) region of a structure with low constraint, a plastic constraint correction coefficient χ was proposed. It was defined as a ratio of KJ of a fracture toughness specimen to KJ of a reactor pressure vessel with a specific flaw shape with the ...
Kiminobu Hojo, Takatoshi Hirota, Yasuto Nagoshi, Takuya Fukahori, Kimihisa Sakima, Mitsuru Ohata, Fumiyoshi Minami   +6 more
openaire   +1 more source

Constraint Effect on Fracture in Ductile-Brittle Transition Temperature Region (Report 2)

Volume 1: Codes and Standards, 2022
Abstract In order to predict fracture behavior of a structure with low constraint, tensile fracture tests using flat plate specimens with a surface flaw were performed at −80°C and −120°C in the ductile-brittle transition temperature (DBTT) region. The shape of the flat plate was 50mm thickness, 200mm width, and 500mm length.
Kiminobu Hojo, Takatoshi Hirota, Yasuto Nagoshi, Takuya Fukahori, Kimihisa Sakima, Mitsuru Ohata, Fumiyoshi Minami   +6 more
openaire   +1 more source

Ductile–brittle transition in micropillar compression of GaAs at room temperature

Philosophical Magazine, 2011
Experiments have been carried out on how compressive failure of axis GaAs micropillars at room temperature is influenced by their diameter. Slip was observed in all micropillars, often on intersecting slip planes. Cracks could nucleate at these intersections and then grow axially in the sample, with bursts of crack growth.
Fredrik Östlund, Philip R. Howie, Rudy Ghisleni, Sandra Korte, Klaus Leifer, William J. Clegg, Johann Michler   +6 more
openaire   +1 more source

Evaluation of Ductile/Brittle Failure Theory and Derivation of the Ductile/Brittle Transition Temperature

Journal of Applied Mechanics, 2015
A recently developed ductile/brittle theory of materials failure is evaluated. The failure theory applies to all homogeneous and isotropic materials. The determination of the ductile/brittle transition is an integral and essential part of the failure theory.
openaire   +1 more source

Stress relaxation and the ductile-brittle transition temperature of molybdenum

Acta Metallurgica, 1966
Abstract The technique of stress relaxation has been used to study plastic deformation prior to yielding or fracture in molybdenum specimens which were tested both above and below the ductile-brittle transition temperature. From the results, it was found that some dislocations were mobile prior to brittle fracture, lending support to the ideas ...
G.A Sargent, B.J Shaw
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Study on Ductile Brittle Transition Temperature of Q345C Steel MAG Welded Joints

Key Engineering Materials, 2016
For Q345C steel MAG welded joints, low temperature tensile test was carried out at normal atmospheric temperature, 0°C,-20°C,-30°C and-40°C in the paper, which results in the law of strength change with temperature. The impact absorption energy of the weld seam sample under different temperature conditions was tested, impact fracture morphology was ...
Yong Shou Wu, Yong Jun Liu
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Strength, ductility, and ductile-brittle transition temperature for MFR candidate vanadium alloys

Journal of Nuclear Materials, 1988
Abstract The dependence of the yield strength, tensile strength, elongation, and reduction in area on temperature for the V15Ti7.5Cr, V20Ti, V15Cr5Ti, V12Cr5Ti, V10Cr5Ti, and V3Ti1Si al temperatures ranging from 25 to 700°C. The strength of the alloys increased with an increase of the combined Cr and Ti concentration.
B.A. Loomis, R.H. Lee, D.L. Smith, J.R. Peterson   +3 more
openaire   +1 more source