Fatigue-Induced Micro-damage Characterization of Austenitic Stainless Steel 316 Using Innovative Nonlinear Acoustics
- Title
- Fatigue-Induced Micro-damage Characterization of Austenitic Stainless Steel 316 Using Innovative Nonlinear Acoustics
- Author
- 장경영
- Keywords
- SURFACE-WAVES; BEHAVIOR; ALLOY
- Issue Date
- 2012-05
- Publisher
- IOP Publishing
- Citation
- CHINESE PHYSICS LETTERS, Vol.29, No.6 [2012], p060702-1 ~ 060702-4
- 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.
- URI
- http://iopscience.iop.org/article/10.1088/0256-307X/29/6/060702/metahttp://hdl.handle.net/20.500.11754/66939
- ISSN
- 0256-307X
- DOI
- 10.1088/0256-307X/29/6/060702
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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