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Showing 1 to 20 of 31 for “"thermomechanical processing"”.
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Thermomechanical Processing of Metallic Glasses
… modified after glass formation. Through various thermomechanical methods, it is possible to bring the glass either to a more relaxed, ordered state of lower energy – this process is called relaxation – or to a more unrelaxed, disordered state of higher energy, a process called rejuvenation. In …
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Thermomechanical processing of aluminum alloys.
Massachusetts Institute of Technology. Dept. of Metallurgy and Materials Science. Thesis. 1970. Sc.D.
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Effect of thermomechanical processing on the surface roughening of AA6061
… two 12 mm). Production of these plates requires thermomechanical processing of the cast slab via a two stage process, namely the initial rolling stage on a hot roughing mill (HRM) and final rolling on the hot finishing mill (HFM). After rolling. the plates are levelled by a tensile stretching …
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Thermomechanical processing of blended elemental powder Ti-6Al-4V alloy
… preforms and then subjecting these preforms to thermomechanical processing (TMP) in an attempt to both improve the relative density and refine the microstructure. The powders used were direct reduction titanium powder and elemental aluminium and vanadium powders.
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Critical analysis of simulated thermomechanical processing of aluminium can body stock
Hot Plane Strain Compression (PSC) testing is a thermomechanical testing method used to simulate the deformation condition of industrial rolling. Thermomechanical processing (TMP) factors such as the amount of strain, strain rate and temperature all influence the microstructural evolution. The …
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Effects of thermomechanical processing on microstructure and hardness profiles in AA6061 plates
Effects of rolling variables - strain (?), strain rate (?) and temperature (T) - on grain structure and hardness evolution in AA6061 plates were investigated by simulating the rolling process using plane strain compression (PSG). Particular emphasis was exerted on understanding the impact of the …
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The influence of the thermomechanical processing on the annealing response of 3CR12 steel
… Cr steel (3CR12) that had undergone different thermomechanical processing routes prior to the annealing step of production. The aim of this research was to identify any changes in the annealing response of 3CR12 steel due to the different thermomechanical processing routes to which the alloys …
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Influence of composition and thermomechanical processing on microstructure evolution in AISI 430 ferritic stainless steel(FSS)
This thesis examines the influence of austenite potential and hot roll finish temperature on the evolution of microstructure in the ferritic stainless steel grade AISI 430. In particular, it focuses on the influence of these variables on the hot band annealing behaviour of this steel. The material …
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Study on Low-cost Alternatives for Synthesising Powder Metallurgy Titanium and Titanium Alloys
… heated vacuum furnace, for sintering and in the thermomechanical processing of powders; using low cost alloying elements such as Fe and stainless steel powders and investigating the possibility of using low amounts of alloying elements. The first main stream investigation in this work focussed on …
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The role of particles in recrystallization of a thermomechanically processed A1-Mg alloy.
… response of an AllOMg- O.lZr alloy during thermomechanical processing (TMP) was studied. The TMP had been accomplished in previous work and consisted of 12 rolling passes, with reheating between each pass, to a total strain of 2.5. Quantitative data including length, aspect ratio and area …
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Low Temperature Cleavage Fracture of Microalloyed Bainitic Plate Steels
… four plate samples were produced by different thermomechanical processing (TMP) schedules and had yield strengths in the range 540 - 670 MPa. Microstructures were characterized by optical microscopy (OM), scanning electron microscopy (SEM) and electron back scattered diffraction (EBSD). …
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Estudo do processamento termomecânico de liga experimental de zircônio e seu efeito nas propriedades mecânicas e formação de hidretos
… of the material. This work aimed to validate the thermomechanical processing of an experimental zirconium alloy produced at COPPE, as well as to investigate its effects on the microstructure, on texture and on the precipitation of hydrides in the material. The alloy was processed by two …
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Correlation between homogenisation parameters and property evolution of AA3104 CBS after hot finish rolling
… stock (CBS) is produced through a series of thermomechanical processing stages, including direct chill (DC) casting, homogenisation, hot rough rolling, hot finish rolling, and cold rolling. Homogenisation is an important phase that controls the growth of intermetallic particles (IMPs) and …
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Influência das rotas de processamento na mesotextura e propriedades mecânicas da superliga de níquel 718
… as primary carbides and δ phase. The thermomechanical processing may influence the presence and the volumetric fraction of these phases, crystallography of grain boundaries and their size. The grain boundary movement and consequent grain growth can be a limiting factor for applications …
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Cryogenic Shape Memory Alloy Actuators For Spaceport Technologies: Materials Characterization And Prototype Testing
… range. For the Ni-Ti-Fe alloy used, its thermomechanical processing, subsequent characterization using dilatometry and differential scanning calorimetry and implementation in the conduction switch configuration are addressed. This work was funded by grants from NASA KSC (NAG10-323) and …
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Kinetic metallic glass evolution model
… properties; this structure can be altered by thermomechanical processing. This manuscript presents a model for this structural evolution of metallic glass under thermal and mechanical stimuli. The foundation of this model is a potential energy landscape; this consists of three pieces: a …
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Ductility in high chromium super-ferritic alloys
… plastic flow has been studied in relation to the thermomechanical processing parameters and minor element chemistry of wrought super-ferritic alloys based on a composition of Fe-40wt% Cr. These alloys have been developed for corrosion-resistant applications, specifically by micro-alloying with …
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Development and implementation of an opensource DIC acquisition system, focusing on temporal synchronization with the Gleeble 3800
The Gleeble 3800 is a thermomechanical processing simulator with the ability to perform high temperature, high strain rate deformation experiments. The standard Gleeble 3800 uses electrical resistance heating for temperature control and a closed loop hydraulic actuator for displacement control. In …
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