produced in the exposed surface of the test element by peening the test element is then held on a surface of a measuring device so that a space is formed as a result of its deformation between the test element and the adjacent surface of the device a fluid under a low pressure is metered to the space and the rate of leakage from the space is measured such leakage rate being a function of the amount of deformation application_number US 79218977 A description now referring to the drawings and more particularly fig1 and 2 the reference number 10 generally designates a peening intensity test member which may be utilized in the method of measuring the peening intensity of small surfaces in the almen scale the test member 10 comprises a base structure 12 see fig2 and a test element 14 which is of flat relatively thin configuration and removably secured to base structure 12 by a rivet 16 the base structure 12 as best shown in fig2 may be of a disk shape having opposite faces 18 and 20 and a peripheral surface 22 an axial hole 24 is provided in base structure 12 so as to extend through opposite faces 18 and 20 to hold the base structure 12 to a support not shown for shot peening a recess 26 is provided in peripheral surface 22 to receive a retaining means not shown such as an.