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Showing 1 to 20 of 165 for “"Heat treatments"”.
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Powder bed fusion of Ni-based superalloys: process optimization, heat treatments and mechanical performance
L'abstract è presente nell'allegato / the abstract is in the attachment
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Investigation into hardness changes of Pd 11.1 at.% Cu and Pd 11.1 at .% Nb after heat treatments
… investigated. Prior deformation with systematic heat treatments was used to promote ordering, hardness tests were used to detect changes in the microstructure, which might result from ordering. The Pd-Cu alloy and Pd-Nb alloy did not exhibit any significant hardness changes when heat treated. …
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Microstructural responses of a nickel-base cast IN-738 superalloy to a variety of pre-weld heat-treatments
… response of cast IN-738 to a variety of pre-weld heat-treatment schemes. The as-received material showed cored dendritic microstructure, containing coarse grains, about 0.5% casting micropores, 0.7% primary carbide particles, and 42% primary $\gamma\prime$ particles respectively. The …
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Fracture behavior of CPM 10V
The effect of three heat treatments on plane-strain fracture toughness (K <sub>Ic</sub>), fatigue crack growth rate (da/dN), and tensile behavior of a commercial powder metal alloy, CPM 10V, was investigated. Fracture toughness was increased by increasing the tempering temperatures and decreased by …
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Fluorometric determination of sulfhydrl plus disulfide as an index to heat treatment of half-and-half
… (X) = percent quenching (Y)/10,256 + 0.00068. Heat treatments of half-and-half between 65.6°C and 82.2°C for 30 min caused progressive decreases in the -SH + -SS- content of the acid whey. A linear regression analysis relating µmoles of -SH + -SS- per ml of whey (Y) on processing temperatures …
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Microstructure and texture development in AISI430 ferritic stainless steel
… during hot rolling and subsequent annealing heat treatments. Two AISI 430 FSS heats of varying austenite volume fraction were used in this study. The two AISI 430 FSS heats were deformed using the first three passes of the Steckel mill hot rolling process. Post deformation heat treatments …
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The Effects of Applied Strain and Heat Treatment on the Properties of NiTi Wire During Shape Setting
… are commonly subjected to thermo-mechanical heat treatments during production and fabrication. This study investigates the effects of applied strain of 0-10% and heat treatments of 300-600ºC for times of 2-30 minutes during shape-setting of Ti–50.8 at% Ni wire with a nominal diameter of 0.495 …
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Microstructural evolution of AISI304 stainless steel in the Steckel Mill rolling process
… deformation simulations and post deformation heat treatments. The mill logs from industry contains information about various process variables such as temperature, roll speed, dimensions of the mill strip and forces applied to it during the hot mill rolling process. The strain, strain rates …
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The effect of increasing the serum protein content of cottage curd on quality and yield
… milk pasteurized at 143°F. for 30 min. the heat labile serum proteins remained with the whey and represented a loss of approximately 15% of the total cheese milk protein. However, when higher heat treatments than pasteurization were applied, up to 65% of the serum proteins of cheese milk …
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Chemical and physical changes resulting from UHT treatment of milk
… continuous flow, helically coiled tube, indirect heat exchanger was used to heat treat whole milk from 65.6 C to 148.9 C in 5.5 degree increments. Each total heat treatment consisted of 7 seconds. Samples of milk were taken at each heat treatment temperature. The serum was separated by rennin …
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Preparation of bioactive surface via gel oxidation on titanium for biomedical application (hip joint replacement)
… directly to natural bone. Therefore, alkali and heat treatments (gel oxidation) were introduced to improve the bioactivity of titanium by forming a mixture of sodium titanate and rutile on the surface of titanium. This method enables titanium to possess a bioactive surface which is essential to …
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Damage analysis and mechanical response of as-received and heat-treated Nicalon/CAS-II glass-ceramic matrix composites
… damage development in and mechanical response of heat-treated NicaloniCAS-II laminates subjected to monotonic flexure and axial loading and to cyclic tensile loading are reported. The specimens were subjected to post-processing heat treatments at 900°, 1000°, and l100°C in air for 100 hours. …
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Metallographic study of gamma - gamma prime structure in the Ni-based superalloy GTD111
… observed as a result of different heat treatments, formed the basis for investigation of procedures that can potentially restore the alloy microstructure in the original condition. High temperature solution and aging heat treatments sequence is considered as potentially sufficient …
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Directional Recrystallization of an Additively Manufactured Oxide Dispersion-Strengthened Nickel-Base Superalloy
… through directional recrystallization (DRX) heat treatments. The main goal of this study was to assess whether directional recrystallization can achieve a similar effect in AM ODS alloys. Gas-atomized NiCoCr powders were decorated with oxide dispersoids using resonant acoustic mixing then …
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Composition and microstructure evolution in semi-solid cast Al-Zn alloys
… research explores the suitability of utilising heat treatable, Al-Zn-Mg-Cu alloys for the production of high strength parts for the automotive and aerospace industries, using the semi-solid metal rheocasting process. The process results in segregation, arising from non-equilibrium …
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The low temperature fracture behaviour of the super duplex stainless steel Zeron 100
… plate material was also investigated after heat treatments at temperatures of 425 and 850°C, which were known to embrittle the material.
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A potential energy-saving heat treatment for re-circulated irrigation water and its biological mechanisms
Heat pasteurization is an effective water treatment to address the emerging plant pathogen issue associated with increased water recycling practices in the ornamental horticulture industry. The current protocol that recommends treating water at 95"C for 30 s, however, faces two major challenges: …
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