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Title: Property evaluation of thermal sprayed metallic coating by acoustic emission analysis

Abstract

The authors analyzed acoustic emission signals from plasma sprayed sheets by first obtaining the Young's modulus, Poisson's ratio, and density. The sheets of a high Cr-Ni alloy (55Cr-41Ni-Mo, Si, B) were made by low pressure plasma spraying (LPPS) and heat treated. Utilizing laser induced surface acoustic waves (SAWs), the group velocity dispersion data of Rayleigh waves was obtained and matched to that computed by Adler's matrix transfer method. They monitored the acoustic emissions (Lamb waves) produced by microfractures in free standing as sprayed coating subjected to bending. Fast cleavage type microfracture with source rise time of around 2 {micro}s occurred as precursors to the final brittle fracture. The velocity and time-frequency amplitude spectrograms (wavelet contour maps) of the Lamb waves were utilized for the source location and fracture kinetic analyses.

Authors:
; ; ;
Publication Date:
Research Org.:
Aoyama Gakuin Univ., Tokyo (JP)
OSTI Identifier:
20015646
Resource Type:
Journal Article
Journal Name:
Materials Evaluation
Additional Journal Information:
Journal Volume: 58; Journal Issue: 3; Other Information: PBD: Mar 2000; Journal ID: ISSN 0025-5327
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING; ACOUSTIC EMISSION TESTING; SPRAYED COATINGS; YOUNG MODULUS; POISSON RATIO; CHROMIUM BASE ALLOYS; NICKEL ALLOYS; FRACTURES

Citation Formats

Ishida, Asako, Mizutani, Yoshihiro, Takemoto, Mikio, and Ono, Kanji. Property evaluation of thermal sprayed metallic coating by acoustic emission analysis. United States: N. p., 2000. Web.
Ishida, Asako, Mizutani, Yoshihiro, Takemoto, Mikio, & Ono, Kanji. Property evaluation of thermal sprayed metallic coating by acoustic emission analysis. United States.
Ishida, Asako, Mizutani, Yoshihiro, Takemoto, Mikio, and Ono, Kanji. Wed . "Property evaluation of thermal sprayed metallic coating by acoustic emission analysis". United States.
@article{osti_20015646,
title = {Property evaluation of thermal sprayed metallic coating by acoustic emission analysis},
author = {Ishida, Asako and Mizutani, Yoshihiro and Takemoto, Mikio and Ono, Kanji},
abstractNote = {The authors analyzed acoustic emission signals from plasma sprayed sheets by first obtaining the Young's modulus, Poisson's ratio, and density. The sheets of a high Cr-Ni alloy (55Cr-41Ni-Mo, Si, B) were made by low pressure plasma spraying (LPPS) and heat treated. Utilizing laser induced surface acoustic waves (SAWs), the group velocity dispersion data of Rayleigh waves was obtained and matched to that computed by Adler's matrix transfer method. They monitored the acoustic emissions (Lamb waves) produced by microfractures in free standing as sprayed coating subjected to bending. Fast cleavage type microfracture with source rise time of around 2 {micro}s occurred as precursors to the final brittle fracture. The velocity and time-frequency amplitude spectrograms (wavelet contour maps) of the Lamb waves were utilized for the source location and fracture kinetic analyses.},
doi = {},
url = {https://www.osti.gov/biblio/20015646}, journal = {Materials Evaluation},
issn = {0025-5327},
number = 3,
volume = 58,
place = {United States},
year = {2000},
month = {3}
}