A FUNDAMENTAL STUDY OF ROLLING CONTACT FATIGUE
Quarterly progress rept., 1 Feb-1 May 1962
ALLOY ENGINEERING AND CASTING CO CHAMPAIGN IL
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Chemical polishing of LiF crystals using HBF4 was unsatisfactory. Polishing unannealed irradiated crystals in agitated solutions of 2 to 5 NH4OH was promising. An aqueous solution of 1.5 x 10 to the -4th power M FeF3 was superior to FeCl3 as an etchant medium. Cleavage of LiF crystals at liquid N temperature apparently decreased brittleness. Cleaved crystals annealed between 350 and 500 C showed evidence of thermal etching. High voltage electron irradiation of LiF crystals produced atomistic effects similar to gamma irradiation. Irradiated crystals were cleaved with less effort and deformation than the as-received crystals. A technique for observing dislocations introduced by rolling was devised.