레이저 스페클간섭법에 의한 STS430의 열팽창계수 측정 = Thermal Expansion Coefficient Measurement of STS430 by Laser Speckle Interferometry

다국어 초록 (Multilingual Abstract)

This paper presents ESPI system for the measurement of thermal expansion coefficient of STS430 up to 1,000℃ Existing methods, strain gauge and moire have the limitation of contact to object and do not supply the coefficient up to 800℃ There needs to measure the data up to 800℃ because heat resistant materials have high melting temperature up to 1,000℃ In previous studies related to thermal strain analysis, the quantitative results are not reported by ESPI at high temperature, yet. In-plane ESPI and vacuum chamber for the reduction of air turbulence and oxidation are designed for the measurement of the coefficient up to 1,000℃ and speckle correlation fringe pattern images are processed by commercial image filtering tool-smoothing, thinning and enhancement- to obtain quantitative results, which is compared with references data. The comparison shows two data are agreed within 4.1% blow 600℃ however, there is some difference up to 600℃ Also, the incremental ratio of the coefficient is changed up to 800℃ The reason is the phase transformation of STS430 probably begins at 800℃.

목차 (Table of Contents)

• ABSTRACT
• 1. 서론
• 2. Laser Speckle Interferometry
• 3. 실험장치구성
• 4. 실험결과
• 5. 결론
• 참고문헌