Age hardening - Factbites

Age hardening - Factbites
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Topic: Age hardening

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	Interlloy - 630 Precipitation Hardening Stainless Steel Bar
		Machinablity in the H900 (H480) condition is limited, improving as the age hardening temperature is increased to optimum machinability similar to 304 austenitic stainless steel grade in the H1150 (H620) condition.
		The heat tint formed during age hardening, whilst having little effect on corrosion resistance, may be removed when required for appearance purposes by pickling or electro polishing.
		630 in the H1075 (H580) And H1150 (H620) aged condition, can also be re-aged at a lower temperature by re-solution annealing, followed by age hardening at the required temperature for the required duration.
	www.interlloy.com.au /data_sheets/stainless_steel/630.html

	014-015
		Precipitation hardening, or age hardening, provides one of the most widely used mechanisms for the strengthening of metal alloys.
		The latter study tentatively concluded that age harden-ing of aluminum was a room-temperature precipitation phenomenon and suggested that it should be possible for other alloys to be hardened by a thermal treatment leading to precipitation.
		The precipitation hardening hypothesis is now credited with insights into other phenomena, most particularly slip motions in crystals as presented in the slip interference theory [7].
	nvl.nist.gov /pub/nistpubs/sp958-lide/html/014-015.html

	Copper.org : Resources and Tools
		The age or precipitation hardening results from the precipitation of a beryllium containing phase from a supersaturated solid solution of mostly pure copper.
		Then the alloy is given a precipitation or age hardening treatment for an hour or more at a temperature between 200 and 460 C. Upon tempering, the beryllium containing phases, called beryllides, precipitate out of solution.
		The precipitation of the equilibrium gamma phase depletes the metastable gamma prime precipitates, and softens the alloys.
	www.copper.org /resources/properties/microstructure/be_cu.html

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	www.cdbaby.com /cd/harden/from/evor (267 words)

	Lab Project 3 (2000)
		The age hardening temperature is maintained for a determined time period before the alloy is cooled to room temperature, ending the process.
		Precipitation hardening is often employed in copper alloys to improve mechanical properties such as yield strength and hardness.
		The proposed project objective is to study of precipitation hardening by second phase particles on an alloy of composition Cu- 10%Ni - 5% Sn.
	www.mse.mtu.edu /classes/my4130/projarch/projs00/labproj(00)3.html (267 words)

	Heat Treatable Aluminum Alloys
		Age hardening: precipitation of solute atoms either at room temperature (natural aging) or elevated temperature (artificial aging or precipitation heat treatment).
		For some of these alloys, particularly the 2xxx alloys, the precipitation hardening that results from natural aging alone produces useful tempers (T3 and T4 types) that are characterized by high ratios of tensile to yield strength and high fracture toughness and resistance to fatigue.
		In most instances, to avoid those types of precipitation that are detrimental to mechanical properties or to corrosion resistance, the solid solution formed during solution heat treatment must be quenched rapidly enough (and without interruption) to produce supersaturated solution at room temperature - the optimum condition for precipitation hardening.
	www.key-to-metals.com /PrintArticle.asp?ID=39 (267 words)

	Metal and Metallurgy engineering - Aluminum Work Hardening
		Since you believe that no work hardening occurs via break-in nor that age hardening occurs after receipt of the mast, (and also disbelieve my idea that ‘break-in’ is getting rid of slack in the mast connections), you believe that ‘break-in’ is nonsense.
		Work hardening, more properly called strain hardening, occurs when a material is plastically deformed, i.e., when stresses beyond the yield strength cause dislocation motion.
		The work hardening would occur during while the tension side of the mast is stretching on its way to failure.
	www.eng-tips.com /viewthread.cfm?qid=41760 (6784 words)

	Precipitation Hardening : Theory and Applications by J W Martin and Theory of Rank Tests by Zbynek Sidak, Pranab Sen, Jaroslav Hajek: Amazon.com Store.
		Precipitation Hardening (or age-hardening) is an important technique for the metal-using industries.
		A number of excerpts from classic papers are included, which illustrate the development of precipitation hardening from being an art to a science.
		The process is used to enhance the mechanical properties of a wide range of alloys, notably those based on aluminium, but also embracing some nickel and other non-ferrous alloys as well as certain steels.
	www.buybestbooks.com /reviews15/0750638850.html (6784 words)

	Precipitation Hardening: IÉ ®‘“XBookWeb
		Part 2 Mechanical properties of aged alloys: hardness and yield stress; additive strengthening effects; process modelling of age-hardening; work hardening rates; fracture - ductility, intergranular fracture, effect of slip distribution; fatigue; stress-corrosion.
		Precipitation hardening is used to enhance the mechanical properties of steels and other alloys.
		Part 1 The microstructure of precipitation-hardened alloysphases present in metals; thermodynamics and kinetics of ageing; TTN curves; reversion; precipitate distribution; grain shape; texture; quantitative metallography.
	bookweb.kinokuniya.co.jp /guest/cgi-bin/booksea.cgi?ISBN=0750638850 (6784 words)

	Custom and Standard Industrial Furnace, Kiln, and Oven Systems
		Non-ferrous metal (aluminum, copper alloys) processing: melting, casting, solution heat treating, aging, precipitation hardening, annealing, age hardening, and others.
		Ferrous metal (steel) processing: annealing, hardening, carburizing, decarburizing, neutral hardening, carbonitriding, tempering, aging, precipitation hardening, quenching, bright annealing, normalizing, brazing, and others.
	www.delta-h.com /deltawebsitedoc3.htm (6784 words)

	aluMATTER: Precipitation Hardening
		The strongest aluminium alloys (2xxx, 6xxx and 7xxx) are produced by precipitation (or age) hardening.
		aluMATTER > Materials Science & Engineering > Strengthening Mechanisms > Precipitation Hardening
		In the first section, you can learn how a fine dispersion of precipitates can be formed by appropriate heat treatment.
	www.aluminium.matter.org.uk /content/html/eng/default.asp?CATID=61&PAGEID=989848382 (6784 words)

	precipitation hardening
		The process of precipitation hardening, also called age hardening, is widely used to add strength to metal alloy materials.
		The precipitation hardening capabilities of Applied Thermal Technologies, Inc. include stainless steel, high temperature alloys and titanium.
		If you are in search of a precipitation hardening type solution, call (574) 269-7116.
	www.appliedthermaltechnologies.com /precipitation_hardening.html (6784 words)

	aluMATTER: Heat Treatment
		Precipitation or age hardening : 2xxx, 6xxx and 7xxx alloys can be strengthened by precipitation hardening, or 'ageing'.
		Solution heat treatment of precipitation hardening alloys prior to ageing in order to take alloy elements into solution.
		Annealing : strain-hardening alloys (1xxx, 3xxx and 5xxx) can be softened after cold working.
	www.aluminium.matter.org.uk /content/html/eng/default.asp?CATID=17&PAGEID=2144416138 (6784 words)

	Bronze Age Craft (Courses)
		Early bronze age Decorated Flanged Axe from Stonehenge This workshop will follow on from the earlier axe workshop and centre on the archaeology, with the smelting of copper and tin ores, forging and hardening of bronze, cleaning and decorating your bronze axe casting.
		The Bronze Age metal workers in Britain reached new artistic heights with the forging and twisting of bronze and gold in the manufacture of torques, pins and bracelets.
		Its design was influenced by early swords coming out of Bronze Age Europe from what we know as Urnfeild Culture.
	www.templeresearch.eclipse.co.uk /bronze/courses.htm (1615 words)

	materials.dk - Styrkeændrende mekanismer
		- These stainless steel alloys function similarily to the aluminum age hardening alloys such as 2024 and 2075, which can be heattreated to improve strength through the formation of a precipitate.
		The Effects of Cu And Mn Content And Processing On Precipitation Hardening Behavior, Page 5
		- 630 174 Precipitation Hardening Stainless Steel Bar 630 is a 174 PH martensitic precipitation hardening stainless steel with a unique combination of high strength and good corrosive resistance.
	matport.cvt.dk /links/A/11/02 (1615 words)

	Macular Degeneration - Wet and Dry - Age Related Macular Degeneration
		Age-related macular degeneration (ARMD) is a degenerative condition of the macula (the central retina).
		AMD is caused by hardening of the arteries that nourish the retina.
		Macular degeneration may be caused by variety of factors.
	www.stlukeseye.com /Conditions/MacularDegeneration.asp (917 words)

	Effects of Composition, Processing, and Structure on Properties of Copper and Copper Alloys
		High-copper alloys (C16000 to C19900) are designed to maintain high conductivity while using dispersions and precipitates to increase strength and softening resistance: iron dispersions in Cu-(1.0-2.5)Fe alloys (C19200, C19400), chromium precipitates in Cu-1Cr (C18200), and the coherent precipitates in the Cu-(0.3-2.0)Be-Co-Ni age-hardening alloys (C17200, C17410, and C17500).
		Even those alloys that are commercially age hardenable are often provided in the mill hardened tempers; that is, they have been processed with cold work preceding and/or following an age-hardening heat treatment.
		Work hardening is the principal hardening mechanism applied to most copper alloys, the degree of which depends on the type and amount of alloying element and whether the alloying element remains in solid solution or forms a dispersoid or precipitate phase.
	www.key-to-metals.com /Article98.htm (1661 words)

	Predictions for the year 2012 AD
		It is the most degenerate and fallen of the ages,characterized by a hardening of the spiritual core of mankind, an almost total lack of sacredness, and extreme materialism, as humans can no longer determine what is essential for living in this fallen age and what is irrelevant.
		His Divine Mission is to close Kaliyuga, the Iron Age (one of 4 Yugas or time zones that mark the spiritual progression of mankind not the technical iron age), and usher in the Golden Age, a new period of peace prosperity and harmony.
		Kalki's Divine Mission is to close Kaliyuga, the current age of darkness and ignorance and usher in the Golden Age, a new ten thousand year cycle of peace, prosperity and harmony.
	exodus2006.com /2012.htm (1661 words)

	The educational encyclopedia, mechanics material types
		Aluminium matter aluminium alloys, strengthening mechanisms, precipitation hardening, age hardening, strain hardening, solute hardening, grain size hardening, anisotropy, softening
		Umicore advanced materials cobalt, Germanium, Indium, nickel salts, tellurium, thallium, Zn Material - list
		Aluminium aluminium is na kiezel (silicium) en zuurstof de derde in de lijst van meest voorkomende elementen op aarde,
	users.pandora.be /educypedia/education/mechanicsmaterialstypes.htm (1661 words)

	The educational encyclopedia, mechanics material types
		Aluminium matter aluminium alloys, strengthening mechanisms, precipitation hardening, age hardening, strain hardening, solute hardening, grain size hardening, anisotropy, softening
		Aluminium bronze alloys corrosion resistance guide dealing with different aspects of the use of copper-aluminium alloys - generally known as aluminium bronzes
	users.pandora.be /educypedia/education/mechanicsmaterialstypes.htm (472 words)

	Musical development and development of musical preferences: Research summary for parents
		Although hardening of musical taste with age is inevitable, it is advantageous to slow down the hardening of preference as much as possible.
		Music preferences become more set with age; for the general population of school children, music preferences seem to become quite set by the age of 15 or so.
		In musical development, the imitating and experimenting stage of learning is best approached through singing--lots of singing, in many different scales, modes, and meters.
	www.brenthugh.com /musiciq/theory.html (472 words)

	Alloys for Offshore Applications — Duplex and Super Duplex Stainless Steels, Cupronickels and Corros
		Two alloys which are interesting to compare are the age hardening nickel-copper alloy K-500 and age hardening cupronickel Marinel, which have similar mechanical properties and hydrogen diffusion characteristics.
		This alloy was added to the range of alloys available for selection with reference to particular equipment where corrosion and hydrogen embrittlement could occur offshore.
		Several types of alloys have been developed in recent years to combat the degradation of existing alloys by corrosion attack and in some cases hydrogen embrittlement in the harsh offshore environment.
	www.azom.com /details.asp?ArticleID=1732 (2217 words)

	Piltdown Man
		The idea of a Piltdown Man at the end of the Ice Age was extremely difficult to understand, but the idea of a fossil ape of that age in England was equally impossible to accept.
		The animal remains from Piltdown have been [582] famous because they include the remains of a rare type of elephant, of mastodon and of a rare type of rhinoceros, known to have become extinct in Britain early in the Ice Age.
		We had to make quite sure that the organic matter was not gelatine or glue with which the specimen had been impregnated as a means of hardening it.
	www.clarku.edu /~piltdown/map_gen_hist_surveys/piltman_oaklywiener.html (2217 words)

	Sword making - Wikipedia, the free encyclopedia
		For example, an iron short sword from the early Iron Age might be formed by forging, normalized to remove stresses in the material from the forging, and simply finished by grinding and affixing the simplest of handles to it eliminating the hardening process and greatly simplifying the finishing.
		The legend of the Sword in the Stone is possibly a reference and remembrance in storytelling of the techniques of Bronze Age sword making technology[1].
		This page was last modified 04:43, 31 May 2006.
	en.wikipedia.org /wiki/Sword_making (1876 words)

	Bigelow, Marcus James (7) = mar72a26.htm
		Marcus James Bigelow, died in 1931 at the age of 92.
		Marcus James remained very active until into his eighties and then gradually developed hardening of the arteries of the cerebrum and could remember only old times but did not know any of his family.
		Marcus went overland with his parents to CA when he was about 13 years of age.
	bigelowsociety.com /rod7/mar72a26.htm (1188 words)

	Resources: Standards & Properties - Copper & Copper Alloy Microstructures: Copper Beryllium
		The high strength of the copper beryllium alloys is attained by age hardening or precipitation hardening.
		Copper beryllium alloys are used for their high strength and good electrical and thermal conductivities.
		The precipitation occurs during the slow cooling of the alloys because the solubility of beryllium in alpha copper decreases with decreasing temperature.
	www.copper.org /resources/properties/microstructure/be_cu.html (2258 words)

	Beryllium Copper
		Tempered wire is most useful where the properties of Beryllium Copper are desired, but age hardening of finished parts is not practical.
		10 Alloy Beryllium Copper is an age hardenable copper base alloy which provides excellent electric conductivity in combination with good physical properties and endurance strength.
		It is sufficiently ductile to wind on its own diameter and can be formed into springs and most shapes.
	www.lfa-wire.com /berylliu.htm (206 words)

	Feature - EDMing Beryllium Copper: An Introduction
		The high strength of the copper beryllium alloys is attained by age hardening or precipitation hardening.
		The high percentage copper base of these materials provides excellent resistance to hydrochloric acid, carbonic acid, and similar decomposition by-products which can result during the molding process.
		Beryllium copper alloys are used for their high strength as well as good electrical and thermal conductivities.
	www.mmsonline.com /articles/020106.html (2826 words)

	Aluminum 2024 Sheet Plate Tubing
		Aluminum 2024 sheet plate tubing is an age-hardening alloy and responds to heat treatment to accomplish the strengthening (aging).
		Hardening, or strengthening, occurs from a solution anneal and aging at room temperature or varying amounts of cold working.
		Annealing for aluminum 2024 sheet plate tubing is done at 750 to 800 F for at least 2 hours at temperature, followed by slow cooling in the furnace.
	www.alloysinternational.com /aluminum-2024.asp (289 words)

	Reclainmed Asphalt Pavement - Material Description
		The degree of hardening depends on several factors, including the intrinsic properties of the asphalt cement, the mixing temperature/time (increases with increasing high temperature exposure), the degree of asphalt concrete compaction (increases if not well compacted), asphalt cement/air voids content (increases with lower asphalt/higher air voids content), and age in service (increases with age).
		Studies on pavements in California, North Carolina, Utah and Virginia have shown that before and after milling, the pavement fraction passing a 2.36 mm (No. 8) sieve can be expected to increase from a premilled range of 41 to 69 percent to a postmilled range of 52 to 72 percent.
		Stockpiled RAP material may also be used as a granular fill or base for embankment or backfill construction, although such an application is not widely used and does not represent the highest or most suitable use for the RAP.
	www.p2pays.org /ref/13/12842/rap131.htm (2538 words)

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