Results 161 to 170 of about 40,760 (208)
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Determination of the ductile-brittle transition temperature from the microplastic-strain rate
Russian Metallurgy (Metally), 2008The possibility of the determination of the tendency of cast and deformed steels to brittle fracture using the temperature dependence of the small-plastic-strain rate is studied. The temperature corresponding to the maximum in this curve is found to indicate an abrupt decrease in the steel plasticity, which makes it possible to interpret it as the ...
A. K. Andreev, Yu. P. Solntsev
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Doklady Physical Chemistry, 2008
The author deduces required dependence on the ground of consideration of thermodynamic potential at ductile-brittle transition under stresses, having assumed power dependence of coefficients on temperature. Calculated results are compared with the Moessbauer spectra observations.
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The author deduces required dependence on the ground of consideration of thermodynamic potential at ductile-brittle transition under stresses, having assumed power dependence of coefficients on temperature. Calculated results are compared with the Moessbauer spectra observations.
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Effect of purity on the ductile-brittle transition temperature of alloy G29
Metal Science and Heat Treatment, 19831. The exceedingly high cold resistance that is characteristic of alloy G29 of high purity is not observed for the alloy with 29% Mn with a higher concentration of nitrogen and carbon. 2. Because of the austenitizing effect of carbon and nitrogen, the boundary of the phase areas on the Fe-Mn diagram shifts to lower manganese ...
T. F. Volynova, V. M. Mnasin
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Specimen size effects on ductile–brittle transition temperature in Charpy impact testing
Journal of Nuclear Materials, 2004Abstract One key issue for small specimen test techniques is to clarify specimen size effects on test results. In consideration of size effects on determining the ductile-to-brittle transition temperature (DBTT) in Charpy impact testing, a method to evaluate the plastic constraint loss for differently sized Charpy V-notch (CVN) specimens is proposed ...
H Kurishita +7 more
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Ductile-brittle transition temperatures and dynamic fracture toughness of 9Cr-1Mo steel
Metallurgical and Materials Transactions A, 2005The ductile-brittle transition temperature (DBTT) of 9Cr-1Mo steel was characterized by an RT NDT-based K IR curve approach and a reference temperature (T 0)-based master curve (MC) approach. The MC was developed at a dynamic loading condition (loading rate of 5.12 m/s),
A. Moitra +3 more
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Determination of Ductile-Brittle Transition Temperature (DBTT) in Dynamic Small Punch Test
Journal of Testing and Evaluation, 1992Abstract A dynamic small punch test technique is demonstrated for measuring the ductile-brittle transition temperature (DBTT) of aged Cr-Mo-V turbine rotor steels. Based on fracture energy measurements and fracture surface observations it is shown that the dynamic small punch test specimens exhibit a clear ductile-brittle transition ...
Y-H Joo, T Hashida, H Takahashi
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Fracture simulation model for API X80 Charpy test in Ductile-Brittle transition temperatures
International Journal of Mechanical Sciences, 2020ABSTRACT This paper presents a method to simulate fracture patterns of interacting ductile and cleavage fracture and experimental validation using API X80 Charpy test data. For ductile fracture, the stress modified fracture strain damage model is used, whereas for cleavage fracture, the maximum principal stress criterion is proposed.
Ji-Su Kim +4 more
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Materials Science and Engineering: A, 2014
Abstract A modified 9Cr–1Mo steel has been exposed to three separate normalization treatments i.e. at 950 °C, 1025 °C and 1100 °C from As-received (normalized at 1050 °C and tempered at 750 °C) condition. After subsequent tempering treatment the impact toughness in terms of upper shelf energy (USE) and ductile-to-brittle transition temperature (DBTT)
Arya Chatterjee +4 more
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Abstract A modified 9Cr–1Mo steel has been exposed to three separate normalization treatments i.e. at 950 °C, 1025 °C and 1100 °C from As-received (normalized at 1050 °C and tempered at 750 °C) condition. After subsequent tempering treatment the impact toughness in terms of upper shelf energy (USE) and ductile-to-brittle transition temperature (DBTT)
Arya Chatterjee +4 more
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Acta Metallurgica, 1970
Abstract The change in the ductile-brittle transition temperature of polycrystalline chromium produced by subjecting specimens to a hydrostatic pressure, P, in the range 5–31 kbars and then testing at atmospheric pressure was investigated. The transition temperature, Tt, for the as-recrystallized material was ∼550°K and only treatments above 6 kbars ...
H.G Mellor, A.S Wronski
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Abstract The change in the ductile-brittle transition temperature of polycrystalline chromium produced by subjecting specimens to a hydrostatic pressure, P, in the range 5–31 kbars and then testing at atmospheric pressure was investigated. The transition temperature, Tt, for the as-recrystallized material was ∼550°K and only treatments above 6 kbars ...
H.G Mellor, A.S Wronski
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Reduction of the ductile brittle transition temperature of ferritic-martensitic alloy HT-9
Journal of Nuclear Materials, 1984Abstract The effects of austenitization and tempering treatments on the impact properties of a 12 Cr-1 Mo-V-W steel are reported. Austenitizing temperatures covering the range 1000 to 1200°C and tempering treatments of 650 to 850°C were used. The greatest decrease in the ductile brittle transition temperature was found with a combination of “high-low”
Roy C. Wilcox, Bryan A. Chin
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