Date of download: 10/29/2017 Copyright © ASME. All rights reserved. From: Physicochemical Analysis of Machine Hammer Peened Surface Structures for Deep Drawing: Determination of the Work of Adhesion and Spreading Pressure of Lubrication to Surface Structure J. Tribol. 2015;137(2):022301-022301-7. doi:10.1115/1.4029199 Figure Legend: Wetting envelopes of the structures, sheet metal, and placement of the lubricants. SFT = surface tension of solids (mN/m); IFT = interfacial tension of lubricants (mN/m).