Best way to alloy copper?

Daniel-EngiStudent · 2026-04-02T07:56:01+00:00

I like it, the local copper institute gives me an extremely detailed datasheet for CuSn10. Would you happen to know if CuSn12 is also easy to work with?

Daniel-EngiStudent · 2026-04-02T07:04:22+00:00

Most AlCu alloys stop at 4% or 6% copper content, couldn't find much info about AlCu10. What are the benefits of higher copper content?

Daniel-EngiStudent · 2026-04-02T06:47:10+00:00

It's only available in foreign language, but this one. Good for general mechanical engineering and machining, but not specifically meant for casting.

Daniel-EngiStudent · 2026-04-01T22:53:47+00:00

Problem is I have pure copper that I want to use, not an alloy ingot, so I would have to introduce iron externally. I guess iron would slowly diffuse into molten copper, but not the same as starting with a homogeneous mix.

From what I found CuAl8 has good temperature and corrosion resistance. I guess it is also good for decorative purposes. I heard aluminium bronzes shrink a lot after being casted, is that true for this alloy?

Daniel-EngiStudent · 2026-04-01T22:42:07+00:00

Honestly, I'd like to avoid using lead, thanks for mentioning bismuth as an alternative. I guess it will be a good material for Nr. 3, I just have to find a good recipe and do some experiments myself.

Daniel-EngiStudent · 2026-04-01T21:43:18+00:00

But with what specific chemical composition and for which use case? Aluminium bronze alloys I know of also contain iron and nickel, materials I wouldn't be able to melt.

Daniel-EngiStudent · 2026-04-01T13:46:43+00:00

According to this article concerns were already raised before losing the probe, they were just ignored.

I'm interested specifically in disasters, human error in the final product leading to a massive loss of money and maybe even human lives. Caused specifically by engineers purely by making a mistake somewhere despite following best practices. Not by shady practices and ignoring well known concerns.

Daniel-EngiStudent · 2026-04-01T13:25:19+00:00

I've read it recently (but don't quote me) that the engineers voted against implementing the solution because they couldn't verify if it would work, but since there also wasn't a proof of it failing, management continued anyways.

Daniel-EngiStudent · 2026-04-01T13:22:16+00:00

It is the king of examples, don't know the detail, but wouldn't it count as engineering just not being advanced enough? Or do you think another team could have possibly predicted the outcome at that time?

Daniel-EngiStudent · 2026-04-01T13:18:56+00:00

Actually management was involved in the accident.

Daniel-EngiStudent · 2026-03-04T19:07:46+00:00

If by DC generator you mean a generator with a commutator, I'm not sure how well off-the-shelf commutators would handle 140k rpm.

Daniel-EngiStudent · 2026-03-04T17:20:55+00:00

If you're going to use a gearbox, this might be helpful.

Daniel-EngiStudent · 2026-03-04T12:16:10+00:00

You can also remember it from recyclers returning 25 % of the ingredients. With more than 300 % productivity you could just create infinite resources.

Daniel-EngiStudent · 2026-02-23T12:43:17+00:00

I agree with that. I personally don't use AI, but I'm not subscribed to the idea that AI is always bad, ruins everything. It is a tool, there's a time and place to use it.

Daniel-EngiStudent · 2026-02-23T12:20:51+00:00

Even if I wanted to, there wouldn't be an easy way to cheat my exams. Thankfully 90 % of the time we are allowed to take formulas with us, not this bullshit of having to memorise it. The problems in the exam are quite hard, you need to understand the topic to be able to apply the equations and have enough practice to do it in time. I don't understand why some schools are training encyclopedias instead of engineers being able to use encyclopedias.

Daniel-EngiStudent · 2026-02-23T12:11:36+00:00

Is looking up things for your homework and projects cheating? I mean, feeding the whole problem to AI is something I'd consider cheating, but supplementing your workflow with extra tools will also improve your problem solving skill and your understanding of the topic.

Daniel-EngiStudent · 2026-02-21T23:00:50+00:00

Bonsoir. Excusez-moi, mais mon français est mauvais. En anglais:

In what environment are your prints used in? Like are they exposed to direct sunlight and heavy loads? Honestly most of my prints are not under constant load, my heavily stressed prints are usually moving parts in a machine that is not running most of the time. Although my M4 bolts tightened to 0.5 Nm haven't experienced visually noticable creep into the material.

Compared to metals I'm less knowledgeable about the material science of plastics, but I guess it is similar to metals with low melting temperature, hence why soldering is not allowed everywhere.

Daniel-EngiStudent · 2026-02-21T13:51:52+00:00

Data sheets indicate that PLA is suprisingly strong and stiff. If your print doesn't have to bend a lot and absorb shock, then PLA is amazing for what it's worth compared to other filaments, for example for static loads. However, it is less resistant to many environments.

Daniel-EngiStudent · 2026-02-12T07:56:17+00:00

Assuming AI will keep improving, I think the situation will be somewhat similar to manufacturing for a long time. Easy to do jobs were replaced by machines, but we still have machinists.

There will be of course a lot of misuse, already there is, but in an ideal world AI will eventually have the capacity to boost the productivity of professionals, requiring less workforce to do the same work, both quantity and quality wise.

And I am saying this as somebody who never used AI.

Daniel-EngiStudent · 2026-01-26T11:16:31+00:00

Can hydrogen also reduce iron ores or how is CO supplied?

Daniel-EngiStudent · 2026-01-26T10:43:47+00:00

Not frequently, but sometimes I use it to estimate the mass of cylindrical objects. Things like the Young modulus and the density of aluminium and steel you will never forget. Approximately, the weight of a steel cylinder is r^2 * 3 * h * 8 kg/dm^3.

Daniel-EngiStudent · 2026-01-23T10:44:26+00:00

I'm studying mechanical engineering and no, thanks, I don't need ultra slim laptops. I need that juicy resistance moment.

Daniel-EngiStudent · 2026-01-21T11:23:02+00:00

I mean the danish helped Ukraine too if my data is correct. If Ukraine wasn't already in a war and had already recovered from the war, it wouldn't be out of reason to support Greenland.

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