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Miniature metal glaciers?

 
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rjlittlefield



Joined: 06 May 2005
Posts: 727
Location: Richland, WA, USA

PostPosted: Sun Apr 30, 2006 12:20 pm    Post subject: Miniature metal glaciers? Reply with quote

Here's something a bit different for you. Very Happy



These are actually little curls of aluminum that came off cutting tools when I was doing a bit of machining recently. The larger two are from a drill bit, the smaller one from a lathe chisel.

What I think is cool about these things, is how much they look like little glaciers when you look close.



One surface is polished from direct contact with the tool, while the bulk of the metal and the opposite surface are heavily striated.

The striations are caused by compressive shear forces that make the metal grains slide across each other without coming apart.

So the process really is very much like what happens to the body of a glacier, except of course with the metal it happens a lot faster and hotter. Shocked

The background is the underside of a maple leaf, just 'cuz I thought the color and texture went well with the metal. Very Happy

Hope you enjoy these!

--Rik

Technical: Both pics are full frame, deeply stacked. The first one is Sigma 105mm at f/11 at 1:1 (22.7mm wide), 0.020" focus step. The second one is Olympus Zuiko 38mm at f/4 at 3.4:1 (6.73mm wide), 0.002" focus step.
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Ken Ramos
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Joined: 04 May 2004
Posts: 4809
Location: Western North Carolina

PostPosted: Sun Apr 30, 2006 12:56 pm    Post subject: Reply with quote

Some pretty neat photographs Rik. Very Happy The first one looks like as though you swipped some stuff off someones Christmas tree though! Very Happy
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Reposts of my images within the galleries are welcome, as are constructive critical critiques.
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rjlittlefield



Joined: 06 May 2005
Posts: 727
Location: Richland, WA, USA

PostPosted: Sun Apr 30, 2006 1:14 pm    Post subject: Reply with quote

Ken Ramos wrote:
The first one looks like as though you swipped some stuff off someones Christmas tree though! Very Happy

Hah! A picture of my work area would dispell that thought instantly. But I'm too embarassed to post one! There are tangles and tangles of this stuff lying around looking like some robotic bird's nest. Very Happy

--Rik
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MikeBinOKlahoma



Joined: 20 Nov 2004
Posts: 1491
Location: Umm....Could it be Oklahoma?

PostPosted: Sun Apr 30, 2006 4:46 pm    Post subject: Reply with quote

That is a very unusual shot!

If you've got that much (seriously) shaved metal laying around, you might want to think about dust inhalation hazard. I assume this process produces fine particles?
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rjlittlefield



Joined: 06 May 2005
Posts: 727
Location: Richland, WA, USA

PostPosted: Sun Apr 30, 2006 8:19 pm    Post subject: Reply with quote

MikeBinOKlahoma wrote:
I assume this process produces fine particles?

Nope, nary a particle to be found. I don't have any metal-working processes that make airborne particles. Cutting cast iron or brass can make some stuff like heavy dust, but it all falls into a little pile under the tool.

There is some real hazard in these curls, though, and that's eye damage.

A long smooth cut on the lathe can crank out many feet of this curl, and it just keeps on growing until something makes it break off. Problem is, while the curl is growing, it's also turning. It's turning around its own axis, which doesn't seem so bad, and it really isn't...until the curl catches on something that stops the far end from turning. Then the whole freaking thing quickly winds up into what the protein guys would call a "tertiary structure", which is a polite way of saying one big knot, which flails around until you either interrupt the cut or it catches on something strong enough to make it break off.

Goggles are a good idea...

--Rik
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twebster
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Joined: 19 Apr 2004
Posts: 1518
Location: Phoenix "Valley of the Sun", Arizona, USA

PostPosted: Sun Apr 30, 2006 9:21 pm    Post subject: Reply with quote

Quote:
Goggles are a good idea...


Goggles Question I thought "Goggles" is an Internet search engine Question Think

Seriously, this is impressive, Rik. I love the contrast of the shavings on the leaf. Very artistic, my friend. Very Happy

Best regards as always, Very Happy
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rjlittlefield



Joined: 06 May 2005
Posts: 727
Location: Richland, WA, USA

PostPosted: Sun Apr 30, 2006 10:25 pm    Post subject: Reply with quote

twebster wrote:
I love the contrast of the shavings on the leaf. Very artistic, my friend.

Thanks, Tom! I liked the way it came out, too.

twebster wrote:
Quote:
Goggles are a good idea...

Goggles Question I thought "Goggles" is an Internet search engine Question Think

You know, I had the devil's own time typing "goggles", with only one "o" and two "g"s in the middle.

And then after I typed it, I had to sit staring at it for a really long time, convincing myself it was right. Confused

But to my credit, I did not visit Google and type "define: goggles" . At least, not until just now...for reassurance only, you understand. Very Happy

I remember a time when "Google" was hard to type.

Things change... Think Very Happy

--Rik
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rjlittlefield



Joined: 06 May 2005
Posts: 727
Location: Richland, WA, USA

PostPosted: Thu May 04, 2006 10:02 pm    Post subject: Reply with quote

Somebody asked me offline about the resolution of these images.

Here's a crop from the second one. This shows pretty much all the detail that's available.

--Rik

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