Compressive residual stress generation at crack tip in bulk metal using acoustic cavitation
- 주제(키워드) 도움말 Acoustic cavitation , Crack , Bulk metal , Compressive residual stress , Crack growth retardation
- 발행기관 ELSEVIER SCI LTD
- 발행년도 2021
- 총서유형 Journal
- 본문언어 영어
초록/요약 도움말
We propose to generate compressive residual stress at the crack tip in the bulk metal by introducing acoustic cavitation to the crack tip. We conducted experiments using pre-cracked specimens to measure compressive residual stress at the crack tip achieved by the acoustic cavitation. In the experiments, the pre-cracked metal specimens were subject to an acoustic load with a frequency of 20 kHz to introduce acoustic cavitation to the crack tip. We found that the acoustic cavitation generates a significant amount of compressive residual stress at the crack tip and the generated compressive residual stress effectively retarded the crack growth.
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