Some articles on zones, stir zone, zone:
... microstructure can be broken up into the following zones The stir zone (also nugget, dynamically recrystallised zone) is a region of heavily deformed material that roughly corresponds to the ... The grains within the stir zone are roughly equiaxed and often an order of magnitude smaller than the grains in the parent material ... A unique feature of the stir zone is the common occurrence of several concentric rings which has been referred to as an "onion-ring" structure ...
... one rotation, and it is this material movement that produces the "onion-ring" structure in the stir zone ... Material on the advancing front side of a weld enters into a zone that rotates and advances with the pin ... It was noted that the copper entered the rotational zone around the pin, where it was broken up into fragments ...
Famous quotes containing the words zone and/or stir:
“Just like those other black holes from outer space, Hollywood is postmodern to this extent: it has no center, only a spreading dead zone of exhaustion, inertia, and brilliant decay.”
—Arthur Kroker (b. 1945)
“The hand and foot that stir not, they shall find
Sooner than all the rightful place to go;”
—Jones Very (18311880)