Results 211 to 220 of about 30,101 (264)

Impact Toughness of A Pipeline Steel

Canadian Metallurgical Quarterly, 1977
Abstract Impact fracture toughness of a pipeline steel was studied as a function of temperature and of the orientation of the crack with respect to the rolling direction. Toughness criteria, such as JId and KId, were determined. Precracked Charpy specimens were used in this investigation.
M. N. Bassim, S. Mikhail, D. R. Hay
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Increasing the impact toughness of rails

Metallurgist, 1988
It is known that the deoxidation of rail steel in the ladle with complex ferroalloys based on silicon and including calcium, magnesium, titanium, Or zirconium in a certain combination makes it possible to obtain railroad rails of group-I quality characterized by a high degree of reliability and long service life.
V. I. Syreishchikova, A. A. Deryabin, �. L. Kolosova, V. E. Semenkov, A. V. Pan, M. A. Stambul'chik, A. B. Dobuzhskaya   +6 more
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Impact Toughness of Balloon Films

1969
To increase the reliability and extend the capabilities of scientific ballooning, polyethylene balloon films were measured for impact toughness at +23 and -80 C, using equipment developed for measuring the energy absorbed by or upon diaphragm fracture.
Hauser Research and Engineering Company, National Center for Atmospheric Research, University Corporation for Atmospheric Research   +2 more
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Impact toughness of carbon steels

Metal Science and Heat Treatment, 1975
1. The work of crack propagation increases when the tempering temperature for quenched carbon structural steels is raised from 400 to 600°. 2. With tempering of quenched carbon steels to the same hardness the impact toughness and work of crack propagation at room temperature vary little with a change of the carbon content from 0.3 to 0.5%
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Polymer toughness and impact resistance

Polymer Engineering & Science, 1999
AbstractThis report is a review of the factors that influence the impact resistance of high polymers, with an emphasis on crystalline polymers. The phenomenology of polymeric fracture is examined, including brittle and ductile failure, and the ductile‐brittle transition temperature (DBTT). An in‐depth discussion of the effects of crystalline morphology
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Phase morphology and impact toughness of impact polypropylene copolymer

Polymer, 2005
Abstract Factors influencing the impact toughness of two impact polypropylene copolymers (IPC) with almost the same ethylene content, molecular weight and molecular weight distribution were studied by temperature gradient extraction fractionation (TGEF), scanning electron microscopy (SEM), nuclear magnetic resonance (NMR) and differential scanning ...
Hongsheng Tan, Li Li, Zhineng Chen, Yihu Song, Qiang Zheng   +4 more
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Impact toughness of nanostructured titanium

Metal Science and Heat Treatment, 2007
The temperature dependence of the impact toughness of commercial purity titanium in coarse-grained and nanostructured states is studied. The method of transmission electron microscopy is used to investigate the structure of the initial nanostructured titanium.
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Informativeness of measurements of impact toughness

Metal Science and Heat Treatment, 2008
Measurements of the geometry of a specimen and a fracture are a useful supplement to measurements of the impact toughness and are more reliable than the determination of the “fraction of the ductile component.” Optimum (with respect to the maximum likelihood principle) estimation of the reliability of the shift of serial curves of impact toughness and ...
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The formation of delamination cracks in impact-toughness tests as a cause of the increase in the impact toughness of steels with bcc structure

The Physics of Metals and Metallography, 2015
The role of weakened surfaces parallel to the plane of rolling in the formation of delamination cracks in the course of impact-toughness testing of steels with the bcc structure subjected to high-temperature thermomechanical treatment has been theoretically substantiated.
D. A. Mirzaev, V. M. Schastlivtsev, I. L. Yakovleva, N. A. Tereshchenko, D. V. Shaburov   +4 more
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Effect of cobalt on impact toughness of steels

Materials Science and Technology, 1994
AbstractThe addition of Co to 18%Ni maraging steels produces an increase in hardness due to a synergistic effect. A similar effect is reported in this paper for maraging steels based on Fe–5Mn–6Ni. However, Co is thought to have an effect on the ductile-brittle transition temperature (DBTT) of mar aging steels.
D. R. Squires, E. A. Wilson
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