Aluminium Definition and 156 Threads

Hello. I need to make a part for a oil difussion vacuum pump and I want to use aluminium 2007 allow. This allow contains around 4% of copper and 1,5% of lead. I don´t know if those metals can outgass during the vacuum process. That vacuum pump is supposed to reach around 5 x 10 -6 mbar or 5...

[Mentor Note: Two thread starts merged into one] I need to remove the Aluminium heat fins from a CPU heat extange lined around some copper water heat pipes. I could use a saw, cnc or grinder to remove them, but it seems that this way could be cleaner, and less probable to ruin the heat pipes...

I am trying to calculate the theoretical thickness of an anodised coating. I know all values apart from I am unsure whether to use 2e or 6e for the amount of electrons. Anode reaction as follows: 2OH = H2O + O + 2e the aluminium reactions preferentially with the one O atom, using equation: 3O...

This's slight confusion as productions/markets have aluminium material for making up a vise clamp Is it really going to workable/viable and which type aluminium could reliably be as vise clamp ?

Hello First time here! I have acquired 6 aluminium boxes they are 2 metres in length, they are 150mm x 150mm square and the walls are 3mm thick (they are also powder coated). My plan is to use all 6 boxes upright as posts for a covered pergola or in other words a fancy BBQ hut, so I will be...

Hello engineers, Is it ok to use stainless steel bolts in an anodised aluminium clamp? I know that I should avoid using stainless steel with plain aluminium because of risk of corrosion. Also, what torque would you recommend that I apply to an M10 stainless steel bolt in an anodised aluminium...

For a project I am currently facing a problem that I find difficult to solve. I am developing a shielding portal that uses a mesh to blocks UHF RFID signals. I would like to use aluminium mesh due to it being lightweight and its attenuation properties. The frequency of UHF RFID signals in the...

Hi all, I am having trouble getting repeatable results from a linear regression formula that simply uses temperature vs load cell output especially with rapidly increasing/decreasing temperatures. This appears to be a result of the thermal co-efficient of our temperature sensor being almost...

When anodizing aluminium (or Titanium) a dense hexagonal pattern of microscopic pores is formed, and you can get a pretty high aspect ratio with them. But the illustrations always show the oxide layer with pores on top of a pure aluminium layer. But can you oxidize a thin sheet of material so...

Hi. I've been given these sets of value. How do I calculate Young's modulus and Poisson Ratio from these set of value. I tried to create a stress vs strain graph but the graph does not look like a common stress vs strain graph but instead more of a y=x graph. The diameter of the rod is 10mm and...

Hi, I'm hoping this will be a fairly easy question for someone on here to answer. If I wanted to make a (small?) vacuum tank (basically a hollow cylinder capped with two similarly hollow hemispheres - like so: (===)), how thick would the walls of the tank need to be for it to withstand the...

say I used a good insulator?

I need the coefficient of kinetic friction for movement between greasy aluminium on carbon. It's nowhere to be found on the internet. Thanks in advance!

Summary: I am not a physics student but I really need to prove that aluminium will not deform 10m underwater Hi I am doing a project of a product which will sink underwater. It will be a sealed cylindrical vessel, length 2m, width 1m, thickness 0.02m. Aluminium 6061t will be used with a yield...

the radius of the hole should decrease from my perspective but the book says that the radius of the hole will increase. I am not able to understand why??

Which alloy is better resistant to corrosion and less easy to get scratched and the paint fall? For kitchen cupboard handle. Thanks a lot.

Hello everybody, I am planning to make a gong stand using tube clamps and aluminium tubing, but I am unsure whether the tubing will be strong enough. I like the idea of using aluminium, to aid with portability of the stand. As the stand will be used to play the gong itself, which will move back...

I'm planning on making marquee poles out of aluminium tube. I did so last year and they worked well, but they flexed slightly under tension. To correct this flex, I want to use slightly different size of aluminum tube. I used 4" tube, with a ¼" wall, at a length of 30'. Will the tube be...

Hi, just thinking about a possible project and it may involve bolting aluminium plates together and putting a very small voltage across them. If I take two plates of aluminium, leave them to oxidise in air (we all know Al forms a surface layer) then is there a minimum voltage that will flow...

Hi all, I'm hoping one of you clever people can help me with whether my seat mounts will be suitable or not. I've done loads of googling and forum searches, but I just can't get my head around it. I have a 630mm gap that I need to bridge and mount a seat too, so the seat will be directly...

Hello all, I am curious as to whether it is possible to create aluminium from a thermite reaction. Thermite, as standard, uses aluminium and iron oxide, which react together when burnt to create a blob of molten iron. I would like to achieve a similar result, but with a blob of molten...

What would cause a hole to form in the top aluminium tank of a radiator of an earthmoving machine. The tank material is 6mm thick and is made from 1050 aluminium plate. The material around the hole has bubbles almost like pitting corrosion or like somebody went and took a flame to it. The rest...

As I mentioned in subject, I want some molten aluminium. Is it dangerous for human health to do it? Should i use some protection?

Bringing gallium and aluminium together has some interesting and occasionally rather explosive results, as Dan found out in this little tale from the prep room at the Royal Institution, UK.

I need some help with this task, I am stuck. 1. Homework Statement An aluminium ring is placed on top of an elctromagnet. a. The electro magnet is connected to AC. What will happen with the aluminium ring? Motivate your answer. b. What will happen with the ring if the electromagnet is...

Describe how Aluminium can corrode or degradein Aircraft Fuselage. And methods for avoid degradation in Aircraft Fuselage. I don't know where to find any information on it at all

An aluminium weight (B) is placed on top of a 0.472 kg wooden block (A) that is floating in water as shown below. The wooden block has a density of 533 kg.m-3 (3 s.f.). Calculate the required mass of the Aluminium weight to just fully submerge the wooden block as shown in the diagram. The...

I was torn between Materials, Mechanical and Electrical Engineering but could not think which would be the best home for this question so I’ve put it here for now. I tore open an old exorcise bike that used a big fly wheel with magnets on a lever and a strip of copper around the rim. I could...

Hello, Can anybody help me for below problem? We have done extrusion of 6061 material and we achieve T6 hardness after 8-10 hour edging process. Now the problem is...when we have check mechanical properties of aluminium then it is not matching with T6 mechanical properties. Can anyone help...

I want to make an antiperspirant myself, i am a bit confuse about the hexahydrate part, for instance i let AlCl3 powder in open for a few days to absorb humidity what is the next step? i am an art student but i wasn't that bad in chemistry in school, it was just my lack of interest in this...

Consider a metal such as Al. How do we look up or determine the relative permittivity of the metal? Suppose we have some known incident frequency, say about c/500nm for visible light. We can look up the bulk plasma frequency (3.7 PHz for Al), can it be calculated from that? For context, what I...

Sorry for my poor english. I did tensile test of aluminium(purity more than 99%. 1000series). The three specimens had tensile directions of 0, 45, and 90 degrees for each rolling direction. strength(both yield and UTS)is higher degree closer 0 degree. and %elongation is too. but modulus of...

Homework Statement An Aluminium rod has a diameter of 40mm. and is 750mm long. If the temperature difference between the ends of the rod is 100C . Take the thermal conductivity of Aluminium to be 235 Wm-1K-1 Homework Equations k * A * ΔT / L The Attempt at a Solution 235 * 0.097 m * 100 /...

Hi, I am designing a system to cool aluminium through contact cooling. I have a steel die with 9x 20mm diameter cooling chambers. Water is pumped through the chambers which cools the steel die and hopefully the aluminium sitting on top of it. I am looking to find the temperature of the...

Homework Statement We had this elementary experiment in class. An aluminium rod is fixed at one end and at the other end you have a disk. You hand increasingly heavy weights on the disk and measure how much the rod shears (twists). We were asked to make a graph of the shear torque vs. angle of...

I have watched many videos of aluminium air batteries and it got me wondering. Could this same process work if you stored the aluminum in vacuum and exposed it to oxygen? For example: A high surface area aluminium plate is in a glass bulb under high vacuum. A copper lead connects to the...

Hi all, I'm going to make a roller shaft for a roller mixer. I will be using a aluminum tube of length 900mm placed horizontally and the two ends will be help in a bearing. An another pipe will be placed side by side to the first pipe with a bit of space in the middle and held the same way as...

The washing machine stopped spinning, so I dismantled it. Here's what I found: I'm thinking it might have become a big battery, as the steel drive shaft was embedded in the alloy drive bracket, which in turn had 6 studs bolting it to the stainless steel drum. It was all enclosed in the sealed...

Hi, I have a question concerning the use of aluminium in power lines. I know that it's lighter than copper and thus cheaper, which is the main reason we prefer it above copper. But in fact alumunium has a lower conductivity than copper. Why is it then that one kg of aluminium can carry twice...

Dear Engineers, I have a rectangular plate (3 x 2 m) made of aluminium (12 mm thickness). I also have a evenly distributed load of 2500 kg spread over the entire plate. How can I calculate the maxiumum deflection at a certain point on the plate? The plate is fixed in all directions on the...

I'm looking for any information about the typical strength for bolts that are threaded into aluminium. I've tried googling them but I'm having hard time finding information; I've tried looking through machinery's handbook and it doesn't seem to be showing the information for this specifically...

Hi there! Is there any ip65 rated enclosure material with electronic components inside but with no holes/cutouts that can act as a heat sink without overheating while the product is operating? Enclosure will need to be wall-mounted outdoors, it could be made out of die-cast aluminium which...

Hi guys, The imagine the picture attached is a cross section of a cylinder. How would I work out the maximum amount of pressure this can be exposed to before the metal shears off at the location labelled "2mm thick"? Lets say the following material is used: T6 Aluminium Ultimate Tensile...

1. Homework Statement Homework EquationsThe Attempt at a Solution I chose B, because I thought adding more OH- would cause the reaction to shift to the left, and a low temperature would slow the rate of reaction, but the answer is A, why pH 7?

My project involves making a 5 ft*3 ft*4 ft (l*b*h) aluminium/stainless steel sheet metal box at the back of a slow moving pedal vehicle. There is no load on the sheet metal, except from small vibrations from road travel. My question is: 1. What gauge of sheet metal thickness would be enough...

Hello, sorry to bother again. A sample containing Al reacts with an aqueous solution of 5.05 g HCl producing 5.70 L of H2 at 20°C and 742 mmHg. Find the mass percent of Al in the sample assuming hydrogen behaves like an ideal gas.I can't again understand this exercise, because I've never done...

Hello Every one I want to know how the pressure applied at a particular point on a rod will be equally divided underneath of the rod. What materials are good to achieve this kind of situation?

Aluminium surfaces are protected by a thin aluminium oxide layer. The oxide layer supposedly does not conduct electricity. However, when measuring the contact resistance between the test pen of a multimeter and the aluminium, this resistance is always small. Why? Is the oxide layer easily punctured?

Hi I have a aluminium hand roller for embossing numbers onto aluminium. When I pass the aluminium plate through the roller, I end up with a kind of banana shaped piece of aluminium. Any suggestion on a jig I could add to the aluminium rollers Thanks

Hi I am planning to make a light weight camera mount for my RC multicopter (drone). Issue is due to irregular shape of the camera, need for the mount to be light weight, and setting up a small angle of inclination (5-10 degrees) the only solution I have come up with is to use light weight thin...