Results 251 to 260 of about 120,428 (308)

Low-Temperature Toughness of the Austempered Offshore Steel

Metallurgical and Materials Transactions A, 2016
This study investigates low-temperature toughness of the offshore steel with two different austempering heat treatments. Toughness of upper bainite is significantly lower than that of lower bainite. Low impact toughness of the upper bainite is caused by the presence of martensite–austenite (MA) and increasing the amount of low-angle lath boundaries in ...
C. Yu, T. C. Yang, C. Y. Huang, R. K. Shiue   +3 more
openaire   +1 more source

Study on fracture toughness of carbon-carbon composites at low temperatures

Materials Today: Proceedings, 2022
Abstract Carbon-carbon composites (C-CC), employed as composites in space and other industries for their outstanding properties. In extreme temperatures, the C-CC has proved to be the most efficient material. C-CC is one of the top thermal quality high-temperature materials such as high-temperature stability, excellent thermal conductivity, and low ...
B.V. Sunil Kumar, Neelakantha V. Londe, Mohan Kumar, M. Lokesha, S.N. Vasantha Kumar, A.O. Surendranathan   +5 more
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Enhanced low-temperature impact toughness of nanostructured Ti

Applied Physics Letters, 2006
Impact toughness is one of the major mechanical properties for structural materials. It is generally observed that in coarse-grained materials the impact toughness decreases with decreasing testing temperature. Here, we report that the impact toughness of nanostructured Ti processed by severe plastic deformation is enhanced at low temperatures of −70°C
V. V. Stolyarov, R. Z. Valiev, Y. T. Zhu
openaire   +1 more source

Effect of delaminations on improvement of notch toughness at low temperatures

Scripta Materialia, 1996
The notched-bar impact test is often used to assess the notch toughness of engineering materials. The principle of the test is that a material absorbs a certain amount of energy when it breaks; the energy thus absorbed is an indication of the material`s resistance to impact fracture.
W. Zhou, N.L. Loh
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Impact toughness of austenitic steels at low temperatures

Metal Science and Heat Treatment, 1967
1. If austenite undergoes no change in the impact test than the impact toughness decreases monotonically with decreasing temperatures. 2. The martensite forming during the test increases the work of formation of the crack but reduces the work of its propagation. The curves of the impact toughness have peaks.
A. P. Gulyaev, A. M. Minaev
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The Improvement of 13MnNiMoNbR Weld Strength and Low Temperature Toughness

Advanced Materials Research, 2011
For the thick steel plate 13MnNiMoNbR, submerged arc welding was carried out, three kinds of wires were used H08Mn2MoA, H10Mn2MoA, H10Mn2Ni2MoA and together with two kinds of fluxes which are SJ101, SJ102 .After welding ,normalizing plus tempering heat treatment was added.Using V-shaped notch Charpy impact test and the fracture morphology was observed ...
Song Ya Tian, Jun Jie Zhang, Gen Yuan Zhang   +2 more
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Low-temperature toughness of direct quenched offshore steel

Materials Research Innovations, 2015
AbstractThe ductile-to-brittle transition of direct quenched and tempered martensite begins at 243 K, and the impact energy of the superficial region of the steel plate decreases from 104 J (243 K) to 50 J (213 K). In contrast, the ductile-to-brittle transition of bainite begins at room temperature.
T. C. Cheng, C. Yu, T. C. Yang, C. Y. Huang, H. C. Lin, R. K. Shiue   +5 more
openaire   +1 more source