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Title: Fatigue damage evaluation of austenitic stainless steel using nonlinear ultrasonic waves in low cycle regime

The interrupted low cycle fatigue test of austenitic stainless steel was conducted and the dislocation structure and fatigue damage was evaluated subsequently by using both transmission electron microscope and nonlinear ultrasonic wave techniques. A “mountain shape” correlation between the nonlinear acoustic parameter and the fatigue life fraction was achieved. This was ascribed to the generation and evolution of planar dislocation structure and nonplanar dislocation structure such as veins, walls, and cells. The “mountain shape” correlation was interpreted successfully by the combined contribution of dislocation monopole and dipole with an internal-stress dependent term of acoustic nonlinearity.
Authors:
;  [1]
  1. MOE Key Laboratory of Pressurized System and Safety, School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237 (China)
Publication Date:
OSTI Identifier:
22304358
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 20; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; AUSTENITIC STEELS; CORRELATIONS; DAMAGE; DIPOLES; DISLOCATIONS; EVOLUTION; FATIGUE; NONLINEAR PROBLEMS; RESIDUAL STRESSES; SIMULATION; TRANSMISSION ELECTRON MICROSCOPY; ULTRASONIC WAVES