Published: Jan 1937
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To my knowledge a symposium on the subject of Metallic Wear has not previously been held. This is rather surprising because of the enormous importance of the subject. There is much scattered information in connection with metallic wear and the testing thereof by specific methods. Much confusion exists in understanding what wear actually is, and particularly in connection with the interpretation of results obtained by various testing methods. Several authors have presented definitions for wear. These have no doubt resulted after much painstaking and carefully considered thought in connection therewith. Louis Jordan has defined it thus: “An unintentional removal in service of the surface of a metal through the action of frictional forces.” H. W. Gillett gives his conception of an adequate definition as follows: “Wear of a metal part is its undesired gradual change in dimensions in service under frictional pressure.” These two able definitions could, no doubt, form a basis for considerable discussion. The Philadelphia District Committee is highly gratified with the splendid response it has had to the invitations extended to participate in this Symposium. H. W. Gillett, Metallurgist, Battelle Memorial Institute, Columbus, Ohio, will contribute a general discussion and will review considerations involved in wear testing, including a classification of the various types of wear. His paper represents the consumation of years of thought, discussion and research on the subject. The annual loss caused by wearing out of metallic parts reaches an enormous total when represented in dollars—no doubt many millions. Few of us realize how much in our daily lives we come in contact with wear problems, and how much we are affected by wear.
Clamer, G. H.
President and General Manager, The Ajax Metal Co., Philadelphia, Pa