Proceedings of the Korean Society of Precision Engineering Conference (한국정밀공학회:학술대회논문집)
- 2004.10a
- /
- Pages.921-924
- /
- 2004
- /
- 2005-8446(pISSN)
A Study on Acoustic Emission Characteristics of MCrAlY Coated Material by Vacuum Plasma Spray Process
진공 플라즈마 용사공정에 의한 MCrAlY코팅재의 음향방출 신호 특성 연구
Abstract
This paper is to investigate a crack for plasma sprayed MCrAlY coated material by acoustic emission method in 4-point bending test. The CoNiCrAlY is coated on Inconel-718 by vacuum plasma spray process. Micro-hardness measurement was conducted by means of Micro Vickers-hardness indentor. The porosity of coating layer was measured using a SEM and Image Analyzer. AE monitoring system is composed of PICO type sensor, a wide band preamplifier(40dB), a PC and AE DSP(16/32 PAC) board. The AE count, Hit and energy of coating specimens is measured according to coating thickness.
Keywords