OS1312 Evaluation of Low Cycle Fatigue Crack Initiation Life of Stainless Steel using Ultrasonic Back Reflection method
Details
The objective of present study is to develop an evaluation method of low cycle fatigue crack growth from PSBs of stainless steels using ultrasonic back reflected wave. Behavior of back reflection intensity change from the surface due to fatiguing was measured. It was found that the back reflection intensity decreased linearly before the start of fatigue crack growth from PSBs as the number of cyclic loads was increased. The linearly approximated relationship can predict the remaining life to start crack growth conservatively.
