Hot Deformation
Mostrando 1-12 de 59 artigos, teses e dissertações.
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1. Effect of Rolling Reduction and Temperature on the Oxide Scale of Hot Rolled Mild Steel Strip
Hot rolling experiments were designed to investigate the effect of rolling temperature and rolling deformation on microstructure, thickness and surface red scale of hot rolled mild steel oxide scale by spectrometer, SEM and pickling experiment. The research results show that in the same other experiment conditions, the greater the rolling deformation, the th
Mat. Res.. Publicado em: 04/11/2019
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2. Double Identification of the Optimal Hot Deformation Parameter Windows for AlCu4SiMg Alloy
In order to achieve hot processing products with expected microstructures, the construction of corresponding relationships between micro-evolution mechanisms and hot processing parameters is essential. In this study, such corresponding relationships of as-cast AlCu4SiMg alloy were constructed by double evaluating processing maps and Zener-Holloman (Z) parame
Mat. Res.. Publicado em: 10/07/2019
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3. Effect of Processing Parameters on Hot Deformation Behaviour and Microstructural Evolution of PM Ti-5553 Alloy at a Moderate-high Strain Rate
Isothermal compression tests of Ti-5553 (Ti-5Al-5V-5Mo-3Cr) alloy, produced by a fast consolidation approach from blended elemental powder mixture, were performed on a Gleeble® 3800 thermal-physical simulator to investigate its hot deformation behaviour. The samples were compressed in a wide temperature range from 700 ºC to 1150 ºC and a moderate-high str
Mat. Res.. Publicado em: 10/06/2019
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4. Effect of Hot Deformation on Microstructure, Hardness and Precipitation Kinetics in a C350 Maraging Steel Modified by Titanium Addition
Maraging steels are alloys with a good balance between strength and fracture toughness. These properties are obtained by quenching and aging treatments, where the precipitation of intermetallic compounds is promoted in a martensitic matrix. In this context, this paper aims to evaluate the effect of hot deformation on microstructure, kinetics and formation of
Mat. Res.. Publicado em: 17/09/2018
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5. Effect of Preparation Method on the Electrical and Mechanical Properties of PVC/Carbon Nanotubes Nanocomposites
The biggest challenge for the development of carbon nanotubes polymeric nanocomposites is in the suitable dispersion and distribution of the nanometric particles along the polymer matrix. Several preparation methods have been used to obtain nanocomposites, highlighting the mixture with polymer solution followed by solvent evaporation and the hot compacting.
Mat. Res.. Publicado em: 02/08/2018
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6. Texture, Microstructure and Mechanical Properties of 6111 Aluminum Alloy Subject to Rolling Deformation
The mechanical properties, texture and microstructural evolution of a 6111 aluminum alloy during hot rolling and cold rolling deformation were systematically investigated in this article. The results show that cold rolling and hot rolling have significant effects on the tensile behaviors of the alloy. The shear texture and recrystallization texture mainly fo
Mat. Res.. Publicado em: 31/07/2017
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7. Softening Mechanisms of the AISI 410 Martensitic Stainless Steel Under Hot Torsion Simulation
This study investigated the softening mechanisms of the AISI 410 martensitic stainless steel during torsion simulation under isothermal continuous in the temperature range of 900 to 1150 °C and strain rates of 0.1 to 5.0s-1. In the first part of the curves, before the peak, the results show that the critical (εc) and peak (εp) strains are elevated for hig
Mat. Res.. Publicado em: 23/01/2017
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8. Identification for the Optimal Working Parameters of Ti-6Al-4V-0.1Ru Alloy in a Wide Deformation Condition Range by Processing Maps Based on DMM
The hot deformation behaviours of Ti-6Al-4V-0.1Ru alloy were investigated by isothermal hot compression tests in the temperature range of 1023-1423 K and strain rate range of 0.01-10 s-1. The β transus was determined to be 1198 K by continuous heating method. The values of deformation activation energy Q at the strain of 0.3 were calculated to be 630.01 kJ/
Mat. Res.. Publicado em: 10/11/2016
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9. Analisys of hot deformation behavior of super duplex stainless steel UNS S32760 through processing maps
Abstract The need for materials with higher strength and corrosion resistance in corrosive environments, such as in the oil extraction in saline media, has led to the use of super duplex stainless steels in projects such as the Pre-sal. The manufacture of these materials involves the step of thermomechanical processing, whose performance depends on the worka
Rem: Rev. Esc. Minas. Publicado em: 2016-06
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10. Deformation induced precipitation in an industrial Ti microalloyed dual phase steel
Abstract This study evaluated the influence of plastic deformation during hot strip rolling in the size of TiN precipitates in an industrial Ti microalloyed dual phase steel. TiN is usually used for pinning austenitic grain boundaries during recrystallization and its efficiency depends on factors such as size of the precipitates and Ti precipitated fraction.
Rem: Rev. Esc. Minas. Publicado em: 2015-12
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11. Mechanical Behavior of a Twip Steel (Twinning Induced Plasticity)
ABSTRACTA TWIP steel (0.65%C; 22%Mn; 0.28%Cr; 0.16%Si) was produced in the laboratory by melting, casting, hot forging and hot rolling. The relationship between mechanical twinning fraction and mechanical behavior of this steel was studied through tension tests at the following temperatures: 25, 300, 325, 350, 375 and 400°C. Fracture toughness was measured
Matéria (Rio J.). Publicado em: 2015-09
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12. Caracterización de semielaborados de aleaciones de titanio procesadas por extrusión y laminación perforación (proceso Mannesmann)
ABSTRACTFor the manufacture of seamless pipes and tubes are used, as raw materials, hollow bars from hot deformation processes like extrusion and rotary tube piercing (Mannesmann process). Starting from these semi-elaborated products and by means of successive cross sections reductions through tube drawing or tube rolling (cold pilgering) the requested final
Matéria (Rio J.). Publicado em: 2015-09