Fatigue-Induced Micro-damage Characterization of Austenitic Stainless Steel 316 Using Innovative Nonlinear Acoustics
- Authors
- Kim, Chung-Seok; Jhang, Kyung-Young
- Issue Date
- Jun-2012
- Publisher
- IOP PUBLISHING LTD
- Citation
- CHINESE PHYSICS LETTERS, v.29, no.6, pp.1 - 5
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHINESE PHYSICS LETTERS
- Volume
- 29
- Number
- 6
- Start Page
- 1
- End Page
- 5
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/165414
- DOI
- 10.1088/0256-307X/29/6/060702
- ISSN
- 0256-307X
- Abstract
- We present innovative nonlinear acoustics for characterizing fatigue-induced micro-damage of austenitic stainless steel 316 subjected to high-cycle fatigue. Various fatigue-driven deformations are accumulated at several positions near the middle of hourglass-shaped specimens. A bell-shaped curve of acoustic nonlinearity as a function of position is observed, and the variation in acoustic nonlinearity is attributed to the evolution of a lattice defect (dislocation) and stress-induced martensite based on transmission electron microscopy (TEM) observations. An oblique incidence technique using a longitudinal waveform is a potentially viable method for characterizing the high-cycle fatigue deformation of austenitic stainless steel 316 alloys.
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