Results 301 to 310 of about 4,496,230 (391)
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Hot-worked microstructure and hot workability of cold-work tool steels
Materials Characterization, 2018Abstract The hot workability of two cold-work tool steels were evaluated and compared. A D2 and an advanced alloy based on 8% Cr steels (TDx) were deformed at high temperatures between 900 and 1100 °C with strain rates 0.001–10 s− 1 via hot compression test.
Tae-Ho Lee +5 more
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Steels for hot working dies [PDF]
Metal Science and Heat Treatment, 1969 1. New die steels with 3–5% Cr surpass steel 5KhNM (5KhNV) in heat resistance and rigidity and have the same impact toughness in small sections. Steel 5KhNM (5KhNV) has better impact toughness and erosion resistance only in large sections (above 100 mm). 2. Steels with 3% Cr have almost the same heat resistance as steels with 5% Cr and a
Yu. A. Geller, V. M. Zuev
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The Measurement of Fatigue in Hot Working Conditions
Ergonomics, 1971Abstract The N.S.W. Division of Occupational Health was requested to provide information to assist a Mines Rescue Station to choose a type of self-contained breathing apparatus which would be likely to permit the greatest duration of exposure of Mines Rescue personnel to hot and humid environment whilst performing heavy work, without collapse. A number
E. O. Longley, O. Lomaev, R. B. Welch
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Recrystallization in Hot Working and Creep
Metal Science, 1974AbstractExperimental evidence indicates that metals may recrystallize during hot working. A model is presented that permits discussion of the influence of this process on stress/strain curves at high strain rates and on the dependence of strain on time for low strain rates (as in creep).
H. P. Stüwe, B. Ortner
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Constitutive analysis in hot working
Materials Science and Engineering: A, 2002Constitutive equations including an Arrhenius term have been commonly applied to steels with the objective of calculating hot rolling and forging forces. The function relating stress and strain rate is generally the hyperbolic-sine since the power and exponential laws lose linearity at high and low stresses, respectively.
H.J. McQueen, N.D. Ryan
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Working Hot: Materialising Practices
Women’s Philosophy Review, 2000This chapter is an early attempt to conceptualise art in new materialist terms as a more-than-representational practice. The chapter begins with the observation that the influence of literary theory and cultural studies on visual art theory has situated the visual arts firmly as a discursive and representational phenomenon, whereby visual ...
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New England Journal of Medicine, 1962
MAN'S physiologic capacities for dealing with heat stress are so much better developed than those for cold that he must be classed as a tropical animal. Nevertheless, hot weather imposes extra strains on the cardiovascular system and on the water and salt economies of the body, in addition to those ordinarily accompanying the same activity under ...
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MAN'S physiologic capacities for dealing with heat stress are so much better developed than those for cold that he must be classed as a tropical animal. Nevertheless, hot weather imposes extra strains on the cardiovascular system and on the water and salt economies of the body, in addition to those ordinarily accompanying the same activity under ...
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Serum Enzyme Changes in Hot Work
Journal of Occupational and Environmental Medicine, 1977A total of 31 workers employed in hot work in small-scale foundries, 13 gardeners engaged at light jobs under the sun and 16 sedentary persons were selected after medical screening for a study of the levels of serum enzymes [glutamic oxalacetic transaminase (GOT), glutamic pyruvic transaminase (GPT), lactic dehydrogenase (LDH) and adolase].
N L Ramanathan, D J Parikh
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A model for hot working occurring by recrystallization
Acta Metallurgica, 1974Abstract A theoretical model is presented for hot working when dynamical recrystallization occurs. The workhardening and recovery of the dislocation structure as well as the recrystallization and the continuous grain growth are taken into account. The model is based on a description of the volume distributions of dislocations, which are produced as a
Rolf Sandström, Rune Lagneborg
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