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Showing 1 to 17 of 17 for “"Hot-deformation"”.
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Stress Relaxation of AA 5182 During Hot Deformation
… of AA 5182 during the industrial process of hot tandem rolling. The rolling operations typically take place at temperatures between 300°C and 500°C and strain rates on the order of 10 s-1 to 100 s-1. While the material is in transit between rolling operations, interstand tension continues the …
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Influence of ingot heterogeneity upon hot deformation of alloy 718, The
Includes bibliographical references.
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Investigation of the hot deformation of sintered titanium compacts produced from direct reduction powder
… required to induce recrystallization following deformation was determined by hot compressing wrought titanium samples. Finally sintered titanium samples were hot compressed at É›C and the changes to the microstructure, porosity and mechanical properties was assessed.
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Microstructural evolution during hot deformation of the 6061 aluminium alloy based Al₂O₃ metal matrix composites
… the microstructural changes associated with hot axisymmetric testing of a 6061 aluminium alloy reinforced with 10, 15 and 20% alumina particulate. Cylindrical specimens 10 mm diameter x 15 mm height were compressed in the temperature range of 573-823 K (300-550 °C), at a strain rate of …
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Hot deformation behaviour of SiCp/Al composites and their matrices and an Al-Mg-Si alloy
Isothermal hot torsion tests were performed on two metal matrix composites (15v/o SiC$\sb{\rm p}$/A356 Al and 15v/o SiC$\sb{\rm p}$/6061 Al), a casting aluminum-silicon matrix alloy (A356) and an aluminum-magnesium-silicon alloy (6201). The composites and matrix alloy were tested over the range 300 …
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Effect of strain rate on the hot deformation behavior of microalloyed bar steels at warm forging temperatures, The
Includes bibliographical references.
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Investigation of rolling variables on the structure of steel.
… present research has been critically reviewed. Hot deformation of Nb-free and Nb-containing stainless and C-Mn steels has been carried out by: upset-forging, rolling, and plane strain compression testing. Also, some gridded lead alloy and some mild steel containing Type I MnS inclusions as …
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Grain refinement in cast titanium 6-aluminium 4-vanadium by hydrogenation, deformation and recrystallisation
… combining thermohydrogen processing (THP) and hot deformation.
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A study of direct powder rolling route for CP-titanium
… and to achieve its full density by additional hot deformation processing. In this work, a purpose-built gravity fed vertical powder rolling mill with a roller diameter of 265 mm and a roller width of 150 mm was used. Johanson's powder rolling model has been implemented to simulate performance …
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Microstructure and texture development in AISI430 ferritic stainless steel
… of ferrite to austenite when subjected to hot rolling temperatures. Consequently, the alloys consist of ferrite and austenite during processing. The presence of austenite and ferrite influences the microstructure evolution and texture development during hot rolling and subsequent annealing …
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Microstructure and tensile performance evolution during Titanium - 6 Aluminium - 4 Vanadium (Ti-6Al-4V) temporary hydrogen treatment
… processing (THP) and thermohydrogen and deformation processing (THDP). Cast Ti-6Al-4V was hydrogenated to 20 at.%H and subsequently dehydrogenated at 675⁰C (HDH 675), 700⁰C (HDH 700), 725⁰C (HDH 725) and 750⁰C (HDH 750). Hydrogenated Ti-6Al-4V was solution treated (at 900⁰C), aged (at …
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Enhancing the Sustainability of Aluminium Production and Products
… Subsequent chapters shift the focus to the hot forming of 6xxx series aluminium alloys. Chapter 4 details lab-scale experiments on 6082.50 and two 6110 alloy variants, including finite element modelling and constitutive data generation. This approach demonstrated robust fits of the finite …
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Niobium in Microalloyed Rail Steels
… in reheated austenite precipitates during hot deformation as fine niobium carbides (<50 nm) which inhibit austenite recrystallisation by pinning the austenite grain boundaries. Nb-microalloying increases the ‘no-recrystallisation temperature’ of deformed austenite during multi-pass …
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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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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 …