Questions tagged [metallurgy]
Metallurgy is the science of the production and the processing of different metals and other metallurgic usable elements.
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What's the right stress relief treatment for AS161 magnesium alloy?
I have a 50 year old forged magnesium alloy wheel apparently marked AS161, which I have been led to believe is AS1.61 - not dissimilar to this picture here. So I assume 1.6% aluminium and 1% silicone ...
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Is strip casting the same thing as continuous casting?
Web searches are surprisingly ambivalent on this question. In steel production, do strip casting and continuous casting refer to the same process?
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Spring making machines
There's lots of videos of high-speed spring making machines floating around e.g. YouTube, typically taking wire stock of up to a millimeter or so in diameter and producing items which are clearly ...
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Determine the temperature required for expanding or bending?
Is there any possible way to calculate the temperature required for a metal to expand or bend with dimensions?
For example, take Mild steel with a length of 100mm, width of 150mm, and thickness of 2....
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how to create a Ti V simulation cell with virtual cell approximation for density functional theory calculations
I would like to understand the method of creating simulation cells using the virtual cell approximation for different compositions of TiV using vasp
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What determines the rate of electron discharge machining (EDM) for different materials?
Wire EDM makes no contact with the work piece and disregards hardness.
I am using EDM to cut different materials, and I notice a clear distinction between the rate each material gets cut. For example, ...
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What grade of steel best suits this application?
Take a long, thin, straight wire with a circular cross section. Say, .5mm in diameter and 200mm in length. Hold the wire horizontally at one end (cantilever). What grade of steel would result in the ...
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How to synthesize alloys or new materials on a small scale?
At the lab scale, alloys or intermetallic compounds are synthesized in an arc melting furnace or by induction melting. The quantity produced is about 5 to 10 grams at minimum. My question is, what if ...
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How the choice of etchant can affect the severity of hydrogen embrittlement during pickling and passivation?
Following this question, I am trying to understand how/if the choice of acid we might use during the pickling and passivation of certain metals, can influence the severity of hydrogen embrittlement. ...
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Does anybody know anything about this patented, late-19th-century process for producing white lead?
I debated on whether to put this question in the History or Engineering Stack Exchange. Ultimately, I decided on the Engineering Stack because I believe the people on this site will understand the ...
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How do I measure groove separation?
In this drawing it says that each groove is separated by 5deg. Each groove has a depth of .015", the radius of the contour is 0.47"
How do I measure the separation of each groove?
My sketch ...
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What does LM25KD mean?
I did some reasearch. It looks like LM25 refers to a specific aluminum alloy. I think the KD refers to something about how it is finished.
The context is this sentence describing the wheels of one of ...
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What Formula can be used to plot a relation between stress and strain?
Suppose a question starts by pointing that a cylindrical sample of a certain metal (in my case it is brass alloy) was put under a load. This piece has an initial diameter and length of 1.263cm and 5cm ...
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What is the metallic alloy used in camera cases?
What is the metallic alloy used in camera cases?
They are manufatured by what process?
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Why does faster cooling produce smaller grains?
I've learned that in general steel and other metals tend to have smaller grains when cooled quickly and larger grains when cooled slowly and that at higher temperatures, the grain size grows even if ...
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Corrosion of Ice Auger Blades
I am wondering about corrosion of the steel blades on my ice fishing auger. The auger is used on fresh water lakes (ie no salt involved). I have traditionally brought the auger inside to melt the ice ...
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Grain size and fatigue performance correlation for AMS 5662 Inconel 718
I am trying to do a literature review on the correlation between average grain size and fatigue performance of AMS 5662 (solution annealed condition) Inconel 718. The Special Materials Corporation ...
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Will hundreds of wood-burning fires damage 1/2" thick steel? [closed]
I have 1/2" and 3/8" thick x 24" diameter steel pipes that are typically used for natural gas transport, but in my case they take the shape of horizontal wood-burning cookers. I am ...
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Longer lasting soldering tips
I'm a real thrifty guy, so seeing my soldering tip with months of use on them starting to crack & peel, the layer I take to be nickel cladding, disheartens me. Again, this is planned obsolescence ...
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Why 95% Water is used Instead of 100%
So in this video(https://www.youtube.com/watch?v=v1z829NF9PA) at around 2:35 it says that the alluminium ingots for alluminium foil, after being heated, are cooled down with a mixture of 95% water, 5% ...
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Metallurgy: Purifying Cobalt-Nickel-Copper alloys to Cobalt, Nickel, Copper
I am working on lithium battery recycling modelling. Long story short after certain processes I get as output alloys with different compositions of Cobalt, Nickel and Copper. An example of an alloy is ...
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What is the difference between an alloy and a metamaterial?
Metamaterials are carefully structured materials — often consisting of periodically arranged building blocks — that exhibit properties and functionalities that differ from and surpass those of their ...
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Building up worn steel via plating or other method?
I've asked several people and gotten mixed answers, so I've decided to post the question here. Can steel be electroplated onto steel to build up worn surface areas (I'm talking about less than a ...
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Consumable arc welding Polarity Effect on heat input
why DCEP is generally used in consumable welding process?
As per my understanding more heat is generated where the electrons collide(anode),
so in consumable welding,we want deposition and also want ...
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Iridium carbides in high carbon stainless steel
Has there ever been any high carbon stainless steel made with iridium as one of the alloy components? Is there any research in this direction?
There is a paper from 2016 comparing various iridium ...
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For a given a molten metal (say copper), how do you determine the best material for a 3D printer flatbed? What about circuit board?
Suppose we had a 3D printer that can spew molten metal out of a 0.1mm hot nozzle and that we can control the heat at the last 5mm of the Tungsten hot nozzle's tip.
I'm wondering then how would you get ...
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Why do rare-earth permanent magnets need to be recycled instead of just reused?
For years, scientists and engineers have struggled to find ways to efficiently break down and recycle rare-earth materials from various devices, especially permanent magnets....
My question is: Why do ...
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Best way to prepare a rusty metal surface for hardness testing?
I have a hardox #10mm plate that needs to be tested on Rockwell hardness.
As hardox is sensible to heat I would like to avoid any heat treatment before the testing.
The plate has been water cut.
The ...
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Can diamond grinding wheels be used to grind Tantung (non-ferrous High Cobalt, Chromium, Tungsten alloys?)
I've read that when using diamond wheels to grind ferrous metals, at high temperatures the carbon in the diamond becomes soluble in the iron thus damaging the diamond wheel.
Is it okay to use a ...
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Under what conditions is grinding unnecessary for liquid-solid leaching in mineral processing?
I am a chemical engineering student and I am having trouble understanding a passage in a separation process textbook I am reading. The passage is about the preparing solids for leaching, such as ...
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What is the Specific Heat of Molten Bronze?
I have sources giving the specific heat capacity of bronze as 382 to 385 J⋅kg⁻¹⋅K⁻¹, or as 435 J⋅kg⁻¹⋅K⁻¹. I'm assuming the variation is due to different alloys being considered, which are not ...
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How can I tell if I got counterfeit aluminum?
I recently received an order of extruded aluminum strip 3/32" thick that supposed to be 6061 hardened to specification ASTM B221. However, when we tried to bend it, it broke and the interior ...
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Outline of Various Heat Treatment Processes
I've been trying to sort out some of the heat treatment terms for steel and what they actually mean since there seems to be a lot of interchangeable usage between the two. This is what I have so far. ...
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How long will it take to anneal at a lower temperature?
Someone is trying to anneal a brass casting to minimize the segregation of Zinc. He likes the results of annealing at 400 Celsius for 3 hours, but the high temperature produces problems with residual ...
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How do I calculate the Cr concentration in an Fe-C-Cr alloy?
Say, I have a 0.1 % C and 18 % Cr in a Fe-alloy. At a particular temperature, we have precipitate formation (of Cr23C6), which requires many Cr atoms. At a given temperature , how do I evaluate the ...
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Metal sheet forming - material properties when switching material
What does one have to look out in material properties when changing material grade in cold sheet forming operation (example: from DC04 to DC03 or to DC01). Operation is mostly made of 90°bends and ...
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Springback in carbon/HSLA steel - cold forming
What are the measurements denoted on top of the YS-t steel lines? Material thickness or bend radius?
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In what way does plating a bimetallic strip affect its displacement?
I've got a mechanism that uses a bimetallic strip; for aesthetic reasons I'd like to electroplate it with a thin layer of gold - how does this affect the relative displacement of a bimetallic strip in ...
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Is there a maximum life for things made out of stainless steel or cast iron?
Do steel objects have a maximum lifespan? I read that "316 stainless steel is estimated to last for 1200 years in a “rule“ environment before heavy pitting. In the marine environment this is ...
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Strange old smithing machine, what is it purpose?
Is anyone familiar with such thing?
I suppose that is something used in forge. I don't have better photos, but "steering wheel" was placed on shaft with small gear and this small gear is ...
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How do I EXACTLY calculate the k-factor for metal bending?
Introduction
I've recently started to work with metals and the process of bending them. There is a lot more math involved than I initially thought. All the break press operators just have a ...
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Heat treatment processes in Nickel-Based Superalloys?
What is the difference in heat treatment process between Wrought
Ni-Based superalloys &cast Ni-Based
superalloys
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Why is carbon boil even necessary?
Particularly in an Electric Arc Furnace I have seen carbon boil occuring . I understand the reaction is very vital but what is it's utility? A detailed answer to this is most welcome. The internet ...
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What does time temperature specifically give us? [closed]
What is a Time Temperature curve basically? I have come across this a couple of times while dealing with heat treatment in my industry. A detailed reply to this is most welcome.
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Why is manganese steel non magnetic in as cast condition? [closed]
Is it because of some ferrite stabilizer or something?A detailed explanation to this is most welcome.
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What impact does reduction internal stress cause?
I have noted that recovery primarily reduces the internal stresses of the material.What is particularly confusing is why would that work out.A slightly detailed answer to this is most recommended.Also ...
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Why does decrease in dislocation density result in higher ductility?
Why does a decrease in dislocation density result in decrease in yield strength and increase in ductility?A slightly detailed explanation is what I am looking forward to.
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Unknown metal-piece connected to the case of an iPod Nano 2
I disassembled an iPod Nano 2 yesterday and was surprised to find a round brass-coloured plate glued to the back. I didn't find any mention of it at the teardown over at ifixit.com, as they didn't cut ...
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What is meant by soaking time in heat treatment?
After heating at 950°C and holding the temperature for 3 hours there is a soaking time that is provided for 12 hours. What is the soaking time being referred to here? A detailed reply to this will be ...
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