Author Topic: Aluminum Copper Alloy Experiment  (Read 10942 times)

Offline NormanV

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Re: Aluminum Copper Alloy Experiment
« Reply #50 on: May 16, 2017, 10:52:31 AM »
Ok, thanks for the quick response Andrew. When it's cooled down enough to handle I'll put it back in the kiln to heat treat it and try machining it this evening.

Offline NormanV

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Re: Aluminum Copper Alloy Experiment
« Reply #51 on: May 18, 2017, 10:15:54 AM »
Well, I did the heat treatment, I heated it until it just started to melt and then dunked it in water.
I machined it today, it cut quite well but I noticed that the surface that I achieved was not as good as the sample that Steve showed earlier in this thread. On close examination I saw that I am getting lots of tiny bubbles. I have said previously that I do not de-gas. Next time I melt some metal I will try it to see if it makes a difference for me.

Offline Biggles

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Re: Aluminum Copper Alloy Experiment
« Reply #52 on: May 19, 2017, 09:27:21 PM »
If you really want a hard alloy try Beryllium with Copper. Itís used to cover expensive golf clubs and can be used for armour piercing bullets!

Offline NormanV

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Re: Aluminum Copper Alloy Experiment
« Reply #53 on: May 25, 2017, 11:15:14 AM »
I did a little experiment today, not precise but it gave a ball park comparison of the aluminium/copper alloy and the normal alloy that I use that is car wheels melted down.
I used a centre punch and a club hammer. I arranged it so that the club hammer dropped a repeatable distance onto the centre punch and then measured the resulting punch mark using a magnifier. The copper alloy gave a punch mark 1mm dia and the plain alloy 2mm dia.
I can deduce from this that the addition of copper results in a harder alloy. :)

Offline awemawson

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Re: Aluminum Copper Alloy Experiment
« Reply #54 on: May 25, 2017, 11:35:13 AM »
 :clap:
Andrew Mawson
East Sussex

Offline Pete W.

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Re: Aluminum Copper Alloy Experiment
« Reply #55 on: May 25, 2017, 03:02:54 PM »
If you really want a hard alloy try Beryllium with Copper. Itís used to cover expensive golf clubs and can be used for armour piercing bullets!
 

Years ago, I had occasion to visit an aircraft company in the UK midlands.  There was a detached laboratory on the site, surrounded with a tall security fence.  Occasiomally, one or two of the staff could be seen outside the building, all clad in 'space suits'.  On enquiring of our hosts 'what's that all about?' we were told 'that's the Beryllium research department'.  My understanding is that beryllium's not very nice stuff, even alloyed (e.g. beryllium copper) or in the ceramic form (beryllia) used for semiconductor heat-sinks. 
Best regards,

Pete W.

If you can keep your head when all about you are losing theirs, you haven't seen the latest change-note!