1023 高周波超音波の表面結晶粒界反射波によるステンレス鋼の低サイクル疲労き裂発生過程の評価(S04-2 実験力学における計測・解析法の新展開(2)新しい試験法と産業応用,21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)
詳細
The objective of present study is to develop a method of evaluating the low cycle fatigue crack initiation of stainless steels SUS304 using ultrasonic back scattered wave. A change in back reflection intensity from the surface of the material under cyclic loading was measured. Back reflection intensity decreased before the fatigue crack initiation as the number of cycle increased. Attenuation is caused by the movement of dislocation and this mechanism was considered.
