Talk:Annealing (materials science)

message: I've heard of a process used in aerospace engineering where turbine fan blades are formed from a single chrystal.  Is that what this process is and how would slow-cooling, which creates softness, be a desired property of a jet engine turbo fan blade?
I'm not sure what it's called, but the process definitely exists. I believe it was developed by GE in order to reduce creep from centripetal force. 
I saw a picture of a turboprop blade made of it in a biomaterials class. --Hyperspite 02:27, 6 February 2007 (UTC)
thread_title: Untitled

message: Is this a mistake?  
If scale is to be avoided, annealing is carried out in an oxygen, carbon, and nitrogen free atmosphere (to avoid oxidation, carburization, and nitriding respectively) such as endothermic gas (a mixture of carbon monoxide, hydrogen gas, and nitrogen).
If we need an atmosphere free of oxygen, carbon, and nitrogen, why would we use a gas that contains forms of all three?  Confusing.
Scott Johnson 15:21, 7 June 2007 (UTC)
thread_title: Scale prevention

message: I divided the page of Full annealing. I am sorry for that because I am not sure about copyright...
I added some picture to clearify the full annealing.(georgelade:17 April 2008)  —Preceding unsigned comment added by Georgelade (talk • contribs) 10:31, 17 April 2008 (UTC)
replies: text: Why?  The article isn't really big enough to dedicate a seperate article for Full annealing Iepeulas (talk) 23:28, 30 May 2008 (UTC)
thread_title: Full anneal

message: I ran across this parenthetical, "(about 50 °F above C3 line)".  What is a C3 line?  Also, should there be a space between "50" and "°F"?  Lon of Oakdale (talk) 19:39, 1 May 2008 (UTC)
thread_title: Annealing in a controlled atmosphere

message: The result was merge FULL ANNEALING into ANNEALING (METALLURGY).  The merge proposal has been open since April 2008.  All opinions expressed (3 users) are in favor of the merge. -- Nahraana (talk) 19:59, 30 June 2008 (UTC)
replies: text: Support - The full annealing article is not big enough to have a separate article for it, as of right now (and I don't if it ever will). --Wizard191 (talk) 15:07, 5 June 2008 (UTC)
thread_title: Merge proposal

message: Dhumphus (talk) 10:17, 13 March 2010 (UTC)
replies: text: C3 refers to a line in the iron-carbon phase diagram. I've removed it because the article should be about annealing in general. Wizard191 (talk) 14:55, 13 March 2010 (UTC)
thread_title:  Inline link to Wiki article 

message: The annealing by short circuit article is an article fork about a specific type of annealing, that doesn't have much more room for expansion, therefore it ought to be merged into this article. Wizard191 (talk) 18:07, 21 October 2010 (UTC)
replies: text: I wouldn't. Annealing is a broad topic and resistive annealing (maybe a better name? - it's not just used for wire) is notable enough to stand alone. We could merge (there's no strong reason against it), but I don't see that readers coming to one article will necessarily have to go and read both to gain the full picture (the clearest case pro-merger). Andy Dingley (talk) 20:12, 21 October 2010 (UTC)
replies: text: I don't deny its notability, but it is a very specific topic that doesn't apply to many applications, so it's dying as an orphan. To be honest, I never heard of it until I was looking through the heat treating category, so maybe it would be good to merge it so that the readers of this article see another side to annealing? Wizard191 (talk) 20:31, 21 October 2010 (UTC)
replies: text:  It's also used on sheet, with a roller contact arrangement like a seam welder. I'd support merging of annealing for anything that uses ohmic heating, whether it's by contact or through induction, but not broader. Annealing is largely a theoretical principle, this article is about one (of potentially several) practical instances of it. Andy Dingley (talk) 21:00, 21 October 2010 (UTC)
replies: text: Cool, that ought to be added too! Wizard191 (talk) 21:41, 21 October 2010 (UTC)
thread_title:  Proposed merge from [[annealing by short circuit]] 

message: It is kindly requested that this article shall contain a separete section about nuclear reactor vessel annealing, which is done more and more often to PWRs to extend their useful lifespan to 35-40 years. 82.131.134.203 (talk)  —Preceding undated comment added 23:17, 17 January 2011 (UTC)
thread_title:  Specifically nuclear 

message: 1.^ http://www.handyharmancanada.com/hbpm/silver/silver.htm
This link is the first of the references but it does not work. Without a working link all the information referenced from this link is in need of a new citation.
Joshua Harden (talk) 16:27, 27 June 2012 (UTC)
replies: text: tagged dead link Glrx (talk) 17:31, 29 June 2012 (UTC)
thread_title:  Broken Link 

message: This link refers to another  article that is unrelated and confuses the meaning in this article. The linked article states "a critical point, also known as a critical state, occurs under conditions (such as specific values of temperature, pressure or composition) at which no phase boundaries exist. There are multiple types of critical points, including vapor–liquid critical points and liquid–liquid critical points." and does not seem to relate to the usage the term here. Since I had changed the definite article "the" to an indefinite one "a" and somebody reverted my edit I have removed the link in this article to introduce less confusion to the reader. Please read the text and follow the link before reverting.
174.118.141.197 (talk) 03:10, 24 August 2013 (UTC)
replies: text: Either a link to a proper Wikipedia page that covers this, or a citation of an external source should be included 101.174.62.1 (talk) 10:44, 18 September 2013 (UTC)
thread_title:  Critical temperature link 

message: this article contains absolutely nothing on the history of these developments * supposedly jake Barnett*s - the autistic genius - grampa had a jot to do with this * 74.78.15.101 (talk) 17:13, 6 May 2014 (UTC)
thread_title: no history

message: I feel that the language used in the Thermodynamics section is very technical and is probably only understood by people that already know all about annealing.  Particularly, this sentence- "The decarburization mechanism can be described as three distinct events: the reaction at the steel surface, the interstitial diffusion of carbon atoms and the dissolution of carbides within the steel.[3] " Makes little sense to me as part of this section.  Suddenly it says The decarburization mechanism, as if we had already established that this unexplained thing is part of Annealing.  
 IceDragon64 (talk) 21:12, 9 November 2014 (UTC)
thread_title:  Thermodynamics language 

message: The opening paragraph says that ferrous metals are NOT suitable for quench hardening and copper is.  The Setup and Equipment paragraph says the opposite.  Which is right?
IceDragon64 (talk) 21:22, 9 November 2014 (UTC)
thread_title: Quenching ferrous?

message: " It is soaked for a short period..."
Soaked in what?
IceDragon64 (talk) 21:28, 9 November 2014 (UTC)
thread_title:  Normalization 

message: I am no metalurgist,, but I believe that the article contains a lot of bits and pieces which are really only about annealing iron and steel, mixed into the sections as if they might apply generally to annealing.  Most obviously the graph, which is surely only about ferrous stuff, but doesn't clearly say so. This is a general article about metal annealing and these things should be clear.IceDragon64 (talk) 22:23, 9 November 2014 (UTC)
thread_title:  Ferrous and All Annealing 

message: Without reading the articles, the initial sentence here and at the dab page should include Annealing (glass) within its  and they should be merged. Are the processes and effects actually different? or is the current fork of material about improving-durability-of-common-materials-through-adjusting-temperature-during-their-initial-construction just a mistake? If so, the two pages should be merged and placed at Annealing as its . The EB, e.g., treats these both as an identical process with a single article. — LlywelynII 03:39, 22 June 2015 (UTC)
replies: text: I'll just leave that here. Andy Dingley (talk) 09:56, 22 June 2015 (UTC)

text: Also worth considering, 'annealed glass' is (at least in Australia,e.g. in the National Construction Code / Building Code of Australia) a specific term in building construction.  It may make more sense to have a single 'annealing' article, and a completely separate one for 'annealed glass'.  14.2.15.60 (talk) 09:48, 5 April 2016 (UTC)
thread_title: Merge?

message: For historical treatment, the EB9 and EB11 articles (which treat the metal and glass treatments together as a single article) are at
* .
* .
 — LlywelynII 03:39, 22 June 2015 (UTC)
thread_title: Sources for article expansion

message: Annealing in biology is where Hydrogen bonding is created. Nothing on this page or any other page about that 2001:8003:6A23:2C00:BC63:CAFB:AD3B:D3CF (talk) 04:24, 16 October 2018 (UTC)
thread_title:  Hydrogen bonding 

message: The third paragraph in the introduction says "In the case of ferrous metals, such as steel, annealing is performed by heating the material (generally until glowing) for a while and then slowly letting it cool to room temperature in still air. Copper, silver and brass can be either cooled slowly in air, or quickly by quenching in water. In this fashion, the metal is softened..."
...that paragraph reads as if quenching is an integral part of the annealing process (is it?) and as if the quenching causes the metal to be softened, where my understanding is that quenching does the opposite. Could someone knowledgeable clarify or re-phrase?
Chconnor (talk) 00:17, 20 June 2021 (UTC)
thread_title:  Confusing intro paragraph about quenching 

message: At the risk of being too philosophical: Language in the Thermodynamics section seems to ascribe mechanistic causality in a complex physical system to simple and abstract mathematical constructs:
  "The creation of lattice vacancies is governed by the Arrhenius equation, and the migration/diffusion of lattice vacancies are governed by Fick's laws of diffusion."
Creation and movement of lattice vacancies are complex processes, involving nearest-neighbor quantum mechanical effects, grain-sized collective effects, and others at scales between and beyond. While these processes can be fairly accurately described, modeled, predicted, compared etc. by the two named equations, suggesting that a complex physical system is somehow controlled by a simple equation is a bit suspect. See, e.g., these two quotes in https://en.wikipedia.org/wiki/The_Unreasonable_Effectiveness_of_Mathematics_in_the_Natural_Sciences
    "How can it be that mathematics, being after all a product of human thought which is independent of experience, is so admirably appropriate to the objects of reality? [...] In my opinion the answer to this question is, briefly, this: As far as the laws of mathematics refer to reality, they are not certain; and as far as they are certain, they do not refer to reality."
    — Albert Einstein
    "Physics is mathematical not because we know so much about the physical world, but because we know so little; it is only its mathematical properties that we can discover."
    — Bertrand Russell
Cteno (talk) 14:43, 18 November 2021 (UTC)
thread_title:  Thermodynamics "accord with" rather than "governed by" an equation 

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thread_title:  "Stress relieving" listed at [[Wikipedia:Redirects for discussion|Redirects for discussion]]