ENHANCEMENT OF FATIGUE STRENGTH OF CuAl9Fe4 BRONZE VIA DIAMOND BURNISHING

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  • TITLE: ENHANCEMENT OF FATIGUE STRENGTH OF CuAl9Fe4 BRONZE VIA DIAMOND BURNISHING
  • AUTHOR(S): A.P. Anchev
  • ABSTRACT: Aluminum bronzes are non-ferrous alloys characterized by good strength, wear resistance and corrosion resistance, because of which these bronzes are preferred construction materials for various applications. When the aluminum content is over 9%, heat treatment can be performed in order to improve the mechanical properties - tensile strength, fatigue strength. Further increase of fatigue strength can be realized by means of surface plastic deformation. One method of this is diamond burnishing. The article shows the effect of using diamond burnishing on the fatigue behavior of samples made of CuAl9Fe4 bronze. DB with one pass increases the limited fatigue strength by 11.9% - from 420 to 470MPa. At the same time, the fatigue life increases more than 40 times. Increasing the number of passes from one to six increases the effect of DB in terms of fatigue behavior - the limited fatigue strength increases from 420 to 490 MPa, i.e., by 16.7%, and the fatigue life increased more than 77 times. Based on the results from the fatigue tests, it was concluded that DB is an effective, reliable and economical method for increasing the fatigue strength and, respectively, the fatigue life of CuAl9Fe4 aluminum bronze components.
  • PAGES: 24-
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