PCR'da DNA'ların çoğaltılması aşamasında kullanılan termo cycle'da ki birinc,i aşama. Bu aşamada primerların ortamda bulunan hedef DNA kompenenti ile birleşme ve tekrar ayrıştırma olayı
The act of heating solid metal or glass to high temperatures and cooling it slowly so that its particles arrange into a defined lattice
Without annealing, the quality of our metal products will diminish.
A process of controlled heating followed by gradual cooling to relieve mechanical stresses Annealing copper makes it more pliable
The process of slowly cooling a completed object in an auxiliary part of the glass furnace, or in a separate furnace This is an integral part of glassmaking because if a hot glass object is allowed to cool too quickly, it will be highly strained by the time it reaches room temperature; indeed, it may break as it cools Highly strained glasses break easily if subjected to mechanical or thermal shock See Lehr
A comprehensive term used to describe the heating and cooling cycle of steel in the solid state The term annealing usually implies relatively slow cooling In annealing, the temperature of the operation, the rate of heating and cooling, and the time the metal is held at heat depend upon the composition, shape, and size of the steel product being treated, and the purpose of the treatment The more important purposes for which steel is annealed are as follows: to remove stresses; to induce softness; to alter ductility, toughness, electric, magnetic, or other physical and mechanical properties; to change the crystalline structure; to remove gases; and to produce a definite microstructure
The heating of a die or planchet to soften the metal before preparation of the die or striking of the coin
A process involving high-temperature heating and cooling of the as-rolled cold rolled steel substrate to make it softer and more formable
a generic term used to denote a heat treatment wherein the microstructrure and, consequently, the properties of a material are altered Frequently, refers to heat treatment whereby a cold-worked metal is softened by allowing it to recrystallize
the tempering of glass or metals by heat Can also be used as a treatment for thin films to give them the desired properties
Annealing is the process of heating a metal and then cooling it to make it more workable As metal is worked (hammered, rolled, etc ), stresses make the metal brittle (the metal molecules are pulled into random structures during the working) Annealing the metal make the metal re-crystallize, putting the molecules in an orderly structure The temperature (and amount of time it takes) for annealing a metal depends on what metal or alloy it is Large pieces are annealed in an annealing oven; small pieces are annealed using a blow-torch
The process of heating a glass object to release the strain introduced in the forming process
In the manufacturing of float glass, it is the process of controlled cooling done in a lehr to prevent residual stresses in the glass Re-annealing is the process of removing objectionable stresses in glass by re-heating to a suitable temperature followed by controlled cooling
The process of heating up coin planchets, just prior to striking in order to make them soft and thus receive a better impression of the design This process today is now accomplished by advanced machinery In ancient times the mint would anneal the planchets by holding them in a pair tongs over a charcoal fire
refers to the process of heating silver during manufacture in order to restore its malleability and to strengthen the metal, which becomes brittle with hammering
To heat above the critical or re-crystallization temperature, then controlled cooling metal, glass or other materials to eliminate the effects of cold-working, relieve internal stresses or improve strength, ductility or other properties
1 Heating and then cooling metals in a controlled atmosphere to soften them 2 A process involving heating and cooling usually applied to induce softening In box annealing, the material to be annealed is enclosed in a metal container with, or without packing material to minimize oxidation The charge is usually heated slowly to a temperature just below the transformation range, but sometimes just above, or within it, and cooled slowly
Heating steel to, and holding at a suitable temperature, followed by relatively slow cooling The purpose of annealing may be to remove stresses, to soften the steel, to improve machinablility, to improve cold working properties, or to obtain a desired structure
Heating to and holding at a suitable temperature and then cooling at a suitable rate, for such purposes as reducing hardness, improving machinability, facilitating cold working, producing a desired microstructure, or obtaining desired mechanical, physical, or other properties When applied to nonferrous alloys, the term annealing implies a heat treatment designed to soften an age-hardened alloy by causing a nearly complete precipitation of the second phase in relatively coarse form Any process of annealing will usually reduce stresses, but if the treatment is applied for the sole purpose of such relief, it should be designated stress relieving
a heat treatment of a metal designed to produce a soft, ductile condition Typically the metal is heated and allowed to cool slowly
a generic term used to denote a heat treatment where the microstructure and properties of a material are altered; it frequently refers to a heat treatment where a previously cold-worked metal is softened by allowing it to recrystallize
A process whereby the paperweight is cooled very slowly to prevent it cracking This usually takes place in a large annealing oven with the paperweights passing through different temperature regions on a conveyor Arrow Cane A cane found of Baccarat paperweights made during the Classic Period Aventurine Usually a gold colour, but can be red or green or blue, according to what metallic particles are added to the mixture Also known as Goldstone Back to Top
The process of relieving stresses in molded plastic articles by heating to a predetermined temperature, maintaining this temperature for a predetermined length of time, and slowly cooling the articles to be painted which might craze due to solvent attack
A heat or thermal treatment process by which a previously cold-rolled steel coil is made more suitable for forming and bending by heating to a designated temperature for a sufficient amount of time and then cooled The bonds between the grains of the metal are stretched when a coil is cold rolled, leaving the steel brittle and breakable Annealing "recrystallizes" the grain structure of steel by allowing for new bonds to be formed at the high temperature There are two ways of annealing : Batch(Box) Three to four coils are stacked on top of each other, and a cover is placed on top and : Continuous: The coil is uncoiled and run through a series of vertical loops within a heater: The temperature and cooling rates are controlled to obtain the desired mechanical properties for the steel
A heat or thermal treatment process by which a previously cold-rolled steel coil is made more suitable for forming and bending The steel sheet is heated to a designated temperature for a sufficient amount of time and then cooled The bonds between the grains of the metal are stretched when a coil is cold rolled, leaving the steel brittle and breakable Annealing "recrystallizes" the grain structure of steel by allowing for new bonds to be formed at the high temperature There are two ways to anneal cold-rolled steel coils - batch and continuous
A thermal treatment to eliminate work hardening and solution heat-treatment hardening of a metal by raising it to an elevated temperature and slow cooling to obtain the lowest strength and highest ductility
The process of heating a device or material in order to repair damage to the crystal lattice or activate dopant atoms
Treatment of a metal, alloy, or other material by heating to a predetermined temperature, holding for a certain time, and then cooling to room temperature, done to improve ductility and reduce brittleness. Process annealing is carried out intermittently during the working of a piece of metal to restore ductility lost through repeated hammering or other working, if several cold-forming operations are required but the metal is so hardened after the first operation that further cold working would cause cracking (see hardening). Full annealing is done to give workability to such parts as forged blanks destined for use in the machine-tool industry. Annealing is also done for relief of internal stresses in metal and glass. Annealing temperatures and times differ for different materials and with properties desired; steel is usually held for several hours at about 1,260°F (680°C) and then cooled for several hours. See also heat treating, solid solution
To heat metal, glass or other materials above the critical or re-crystallization temperature, then cool, to eliminate the effects of color working, relieve internal stresses or improve electrical, magnetic or other properties
A process, consisting of heating to and holding at a suitable temperature followed by cooling at a suitable rate, used primarily to soften metallic materials, such as steel This process also simultaneously produces desired changes in microstructure, as in other properties, such as improvement of mechanical or electrical properties, increase in stability in dimensions, facilitation of cold work, etc Also see Continuous Anneal and Batch Anneal
To soften & relieve strains in any solid material, such as metal or glass, by heating to just below its melting point & then slowly cooling it Annealing generally lowers the tensile strength of the material, while improving its flex life & flexibility
-The process of controlled heating and cooling of a metal In wire and cable products, copper and aluminum are annealed to increase flexibility while maintaining adequate strength
To soften and relieve strains in any solid material, such as metal or glass, by heating to just below its melting point and then slowly cooling it This also generally lowers the tensile strength of the material, while improving its flex life
To soften metal by heating and slowly cooling In annealing cast iron the carbon is burned out, near the surface, leaving the outer surface tough and strong while the interior is hard
To soften and relieve strains in any solid material, such as metal or glass, by heating to just below its melting point and then slowly cooling it Annealing generally lowers the tensile strength of the material, while improving its flex life and flexibility
To subject a material to a heat treatment to remove the effects of cold work, lowering its tensile strength, rendering it softer with greater elongation
A means of tempering a hand-made glass marble to reduce its brittle nature and give it added strength Once completed, the marble is placed in an annealing oven where its temperature is reduced slowly over a 24 hour period to room temperature The removal of differential thermal stress Machine-made glass marbles are not annealed
The process of softening metal For ferrous metals, that is those containing iron, the process involves heating the steel up to its critcal temperature and then slowly cooling it For non-ferrous metals such as brass, bronze, silver, gold, aluminum and the like, the process is exactly opposite The metal is heated to the critical temperature and then quickly quenched in water, snow, urine, or oil What annealing actually does on a molecular level is to allow the metal crystals to realign, moving them into their more relaxed state When the metal is worked, the crystals are moved out of alignment, contributing to both hardness and brittleness Practically, in the production of arms and armour the metal must be annealed as it is worked, otherwise the metal might stress enough that it will crack
- A process that prevents or removes strain by heating glass above a certain temperature and then cooling slowly in a very controlled manner Used in glass manufacturing
To subject to great heat, and then cool slowly, as glass, cast iron, steel, or other metal, for the purpose of rendering it less brittle; to temper; to toughen
(n ) Optimisation technique introduced by Kirkpatrick in 1983 which applies statistical mechanics methods to find an approximate optimal solution to a problem Typically a thermodynamic analogy is used for the model system under study and the task of finding an optimal solution is mapped to that of finding the ground state of the thermodynamic system
An algorithm for solving hard problems, notably combinatorial optimization, based on the metaphor of how annealing works: reach a minimum energy state upon cooling a substance, but not too quickly in order to avoid reaching an undesirable final state As a heuristic search, it allows a non-improving move to a neighbor with a probability that decreases over time The rate of this decrease is determined by the cooling schedule, often just a parameter used in an exponential decay (in keeping with the thermodynamic metaphor) With some (mild) assumptions about the cooling schedule, this will converge in probability to a global optimum
Search technique where a single trial solution is modified at random An energy is defined which represents how good the solution is The goal is to find the best solution by minimising the energy Changes which lead to a lower energy are always accepted; an increase is probabilistically accepted The probability is given by exp(-Delta E/kT) Where Delta E is the change in energy, k is a constant and T is the Temperature Initially the temperature is high corresponding to a liquid or molten state where large changes are possible and it is progressively reduced using a cooling schedule so allowing smaller changes until the system solidifies at a low energy solution