炭素鋼の超音波振動下での内耗特性

概要

論文の詳細を見る
Internal friction of carbon steels at around 17 kHz was studied by using a sensitive electromagnetic amplitude sensor attached to an ultrasonic fatigue testing machine under the strain amplitude within 10^<-3>. The effects of the heat treatment and the plastic deformation on the internal friction of carbon steels were made clear as follows. (1) The internal friction Q^<-1> for quenched steels did not depend upon the strain amplitude. (2) The peak of Q^<-1> in annealed mild steels was found at about 3×10^<-4> of strain amplitude. (3) Given a plastic deformation to the annealed mild steel above the yield point, the peak of Q^<-1> disappeared and the value Q^<-1> increased drastically with increasing strain amplitude.
一般社団法人日本機械学会の論文
1990-07-25