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Showing 1 to 12 of 12 for “"hot-compression"”.
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Modeling and Simulation of Viscoplasticity, Recrystallization, and Softening of Alloyed Steel During Hot Rolling Process
<p>"Hot rolling is one of the most important and complex deformation processes in steel manufacturing and is essential to final product quality. The objective of this study is to investigate viscoplasticity, dynamic recrystallization, and static softening of alloyed metal during hot rolling …
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An Experimentally Generated Constitutive Model for Peak Stress (σ_peak) in Compression Samples
<p>The hot working behavior of AISI 1018 steel was studied by hot-compression deformation tests on the Gleeble 1500 thermo-mechanical simulator at true strain values of -0.143 and -0.405, true strain rate values of 0.01 and 0.1, and working temperatures of 900<sup>°</sup>C and 1000°C. The tests …
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Modeling the Transient Effects during the Hot-Pressing of Wood-Based Composites
… The number of interacting variables during the hot-compression process is prohibitively large to assess a wide variety of data by experimental means. Therefore, the main advantage of the model based approach that the effect of the hot-compression parameters on the final properties of wood-based …
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Development of hydrophobic thermoplastic starch composites
… composites are prepared using high friction and hot compression procedure. Tensile test results and SEM images of the fracture surfaces show significant improvement of adhesion between treated cellulose fibers and TPS matrix. In another hand, starch nanoparticles (SNP) were prepared by delivering …
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Avaliação tribológica de compósitos de PTFE e rejeito de scheelita aplicáveis a mancais secos
… and scheelite tailings was mechanically mixed, hot compression molding in a designed mold involved by a electrical resistance and compressed by a hydraulic press. It was investigated tribological performance of composites subject to loads (1) in reciprocating movement and (2) repeated …
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Relationship of moulding pressure and weigh of granulate in improving the mechanical and characteristics of biopolymer from renewable resources
… processed into granulate (powder) to be able to hot compress by hot compression moulding technique. These fabricated samples were namely as biopolymer. The conversion process of bio-monomer into BP was examined using Fourier Transform Infra-Red (FTiR) show the complete conversion of BP from …
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Biodegradable stents made of pure Mg and AZ91 alloy through SPS sintering
… produced by sintering were then submitted to hot compression, rod extrusion and tube extrusion at 330 and 380 °C with different strain rates. During all the process was not possible to obtain recrystallization or grain refinement on pure Mg, and after the tube extrusion it has shown a high …
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Characterisation of metallurgical and mechanical properties of friction stir welded low alloy steels for marine applications
… over a range of strain rates and temperatures by hot compression testing; these data and the subsequent innovative metallurgical examination of the tested samples will contribute to the scientific understanding of the process. The evolution of flow stress is found to be considerably affected by …
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Characterization and consolidation of a high temperature aluminum transition metal powder alloy
… in maintaining the icosahedral phase at hot extrusion conditions. In this study, two powders,20 µm and 150 µm average particle size, were characterized for phases present in the as received condition, and phase stability with thermal exposure. The icosahedral phase was not present in the …
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Microstructure Dual-Refinement and Mechanical Properties Manipulation of TiBw/TA15(Si) Composites by Thermo-mechanical Processing and Heat Treatment
… using low-energy ball milling and vacuum hot-pressing. After refining the initial lamellar microstructure of the material through a solid solution treatment, the evolution of the TA15(Si) matrix and TiBw reinforcement during the hot deformation were studied. Ideal thermo-mechanical …
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The multi-pass deformation of Ti-6Al-4V
… (Tβ) into fine lamellar colonies. Subsequent hot deformation is carried out at temperatures within the two phase region to produce a microstructure that is either equiaxed or bimodal. However, to avoid the formation of shear bands, voids or cracks within the final microstructure, this …
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Cryomilling and Spark Plasma Sintering of 2024 Aluminium Alloy
… be produced by Powder Metallurgy and finished by hot working. In this case, Powder Metallurgy is used to produce preforms with geometry closer to the final one than that attainable by other technologies, reducing production costs and raw material consumption. It is well known that nanostructure (D …