日本金属学会誌

J. Japan Inst. Metals, Vol. 16, No. 3 (1952),
pp. 177-181

On the Wavy Deformation of Contact Metal Surfaces

Minoru Tanaka


Abstract:

This is a report of the results of measurements of the wavy deformations due to compression of contact plane surfaces of the same kind and the different kinds of metals, such as copper,brass, mild steel, axle steel and gray cast iron, as shown in Table 1. In the present experiments, we used the cylindrical test pieces of 10 milimeters in diameter and 10 milimeters in height, the Amsler 10 ton universal testing machine, the needle trace surface tester (× 500), etc. The results obtained are summerized as follows: (1) In the case of the same kind of metals, the contact surfaces give the wavy deformations due to the compressive stress over a certain limit and the roughness increases by the greater stress intensity, as shown in Table 2. (2)In the case of the different kinds of metals, the contact surfaces give the wavy deformations under the compressive stresses greater than those which produce the plastic deformations of the harder metals and the roughnesses are nearly proportional to the yielding of the harder metals, as shown in Table 3∼6. (3) When the gray cast iron contacts with the other metals, the surfaces of the latter make deformations as the prints of the shapes and distributions of flaky graphite in cast iron, as shown in Photo. 11 and Photo. 15.


(Received 1951/11/6)

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