513 高温低サイクル疲労寿命低下に及ぼす粒界すべり量とひずみ波形の役割

概要

論文の詳細を見る
In this study, fatigue tests were conducted with two types of strain waveform at 700℃. To exclude effect of oxidation environment tests were carried out in vacuum (under 5.3×(10)^<-3>Pa). Used strain waveform were fully reversed triangular form (5.0×(10)^<-3>s^<-1>∿1.0×(10)^<-4>s^<-1>) and slow-fast form (3.3×(10)^<-1>s^<-1>∿3.3×(10)^<-5>s^<-1>). The results obtained are summarized as follows; Fatigue life under slow-fast test were shorter than those under fully reversed triangular test probably because the accumulation of grain boundary sliding displacements became larger than that of the fully reversed triangular form. Under slow-fast tests, an increase in creep effects leads to a shorter fatigue life developing intergranular fracture mode.
社団法人日本機械学会の論文
2000-10-05