On Thu, 30 Jul 2015 08:55:41 -0400, Joe Gwinn
wrote:

There was an interesting article in R&D Magazine, with a video:

.http://www.rdmag.com/videos/2015/07/...ie-effect-may-
lead-manufacturing-advances?et_cid=4699640&et_rid=41417408&type=cta

The mystery was always how the oil got to where it needed to be to
affect metal removal - it was hard to see how the oil could penetrate
into the solid metal that was soon to be removed. The video shows that
the surface is cyclically sheared and ends up in a chip that resembles
a stack of dimes, and no penetration into the bulk metal is required to
lubricate this process.

Joe Gwinn

FYI, there's something a little funny about the report. The folds have
been known for at least 50 years. Carnegie-Melon Univ. was shooting
high-speed movies of their formation then. The internal shape of the
displacements, however, probably was not known.

The rest of it is very interesting and somewhat surprising.

--
Ed Huntress