Cold Drawn
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. On the use of thermographic method to measure fatigue limits
Abstract Traditional fatigue limit measurements are expensive and time consuming, requiring a large number of specimens and a long time to be completed. An alternative approach is used in this work to obtain the fatigue limit of a cold drawn steel, in a rotating bending machine, by monitoring temperature variations induced by different load range levels in j
Lat. Am. j. solids struct.. Publicado em: 22/10/2018
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2. Analysis by design of experiments of distortion potentials in drawn and induction hardened wire
In this investigation a DoE (Design of Experiments) analysis of distortion for a typical manufacturing process of pre-straightened, cold drawn and induction hardened AISI 1045 cylindrical steel bars was carried out. A careful characterization of the material, including residual stress states and geometrical changes, was done for the different manufacturing s
Materials Research. Publicado em: 24/02/2012
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3. Efeito do ângulo da fieira na geometria e propriedades mecânicas de barras trefiladas
In cold drawing of metallic bars most of the plastic flow is caused by compressive forces which arise from the reaction of the metal to the die. Due to the characteristics of the process this flow is not homogeneous along the cross section of the bar and is influenced by the die geometry. This inhomogeneous deformation generates residual stresses in the bars
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/03/2011
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4. Influência de parâmetros de processo no empenamento de barras trefiladas do aço SAE 9254
Existem muitas aplicações em engenharia onde são requisitados materiais que apresentem boas propriedades mecânicas tais como, resistência mecânica, alto limite de escoamento, dureza, aliado ao atendimento às necessidades do cliente. Dentro deste contexto, foi realizado um trabalho focado em processo de trefilação combinada, utilizando como método a
Publicado em: 2010
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5. Numerical and experimental analysis of the residual stresses induced by shot peening in automotive springs. / Análise numérico-experimental das tensões residuais induzidas por jateamento com granalha em molas automotivas.
The shot peening is a cold-working mechanical process where a stream of tiny small balls is impelled against the surface of components. Each impact causes plastic deformation and introduces compressive residual stresses on the surface, which consequently increases their resistance to fatigue. This process is widely used in the automotive industry, particular
Publicado em: 2008
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6. The effect of cyclic torsion on the dislocation structure of drawn mild steel
Cold forming is usually associated with the "work hardening" of the material being formed. The work hardening behavior of metals subject to complex processing paths is different from that in monotonic deformation. The results show that, after some initial hardening, there is a possibility that further deformation will cause softening in the material ("work s
Materials Research. Publicado em: 2006-09
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7. Os fundamentos políticos do direito internacional: o exame da operação dos meios de solução pacífica de controvérsias internacionais no sistema internacional da guerra fria
This study purports to examine the way by which the international system that prevailed during the Cold War influenced the operation of the means of peaceful settlement of international disputes. To this end, it initially analyses the principle of the peaceful settlement of disputes and the means that traditionally are used by States to settle their disputes
Publicado em: 2006
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8. Evolução das propriedades físicas, reológicas e químicas durante o amadurecimento da banana Prata-Anã / Evolution of the chemical, reological and physical properties during the ripening of the banana `Prata-Anã.
The ripening kinetics of the banana Prata-Anã harvested at different development stages (18, 19 and 20 weeks) and stored under different temperatures was studied. From each randomly collected bunch, just the second and third hands were used, as being divided into bouquets with four fruits. The experiment was carried out at two stages. In the first stage, th
Publicado em: 2006
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9. Analise das tensões residuais em tubos trefilados de aço inox ABNT 304
Tubular components that present compressive residual stresses in their inner surface can be used as mechanical parts to improve their resistance to torsion and bending cyc1ic stresses. The main objective of this work is to design a cold drawing tool set to generate these compressive residual stresses within ABNT 304 stainless steel tubes, and concurrent1y re
Publicado em: 2003
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10. Talking Science
The Cold Spring Harbor Laboratory Oral History Collection presents interviews with over 80 leading scientists, drawn from the fields of molecular biology and genetics
Public Library of Science.
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11. Possible environmental sources of Acanthamoeba spp in contact lens wearers.
The water supply and dust samples from the home environment (bathrooms and kitchens) of 50 wearers of contact lenses (CLs) were cultured for the presence of free-living amoebae. CL cases, solutions, and water taps were cultured for bacteria, which amoebae require for growth. Acanthamoeba spp were isolated from water drawn from six bathroom cold water taps (t
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12. Effect of climatic temperature on the age of onset of Huntington's chorea 1
The age of 1,403 subjects at onset of Huntington's chorea were drawn from the literature and related to the mean annual, January, and July temperatures of their place of residence. When the data were converted into mean annual, winter, and summer isotherms covering a range of 10° F (5·6° C), there was a statistically significant decrease in age of onset a