강판의 소성이방성 평가를 위한 초음파 속도 측정법

다국어 초록 (Multilingual Abstract)

Plastic anisotropy is one of important factors which determine the drawability of a<br/>
steel sheet. It has been mainly measured by mechanical tensile test. From the<br/>
ultrasonic velocities propagating along the relative directions to the rolling direction,<br/>
CODF (crystallite orientation distribution function) can be measured and ODC's<br/>
(orientation distribution coefficients) has some correlations with the plastic anisotropy.<br/>
In this study the correlations between the plastic anisotropy and ODC's of the cold<br/>
rolled steel sheet were measured. From the results of ultrasonic velocity measurements<br/>
the average normal anisotropy, r and the average planar anisotropy, Δr could be<br/>
predicted within the accuracy of ±0.082 and ±0.096, respectively. Acoustic resonance<br/>
method was applied to measure the ultrasonic velocities and EMAT's were used for<br/>
generating and detecting the ultrasonic waves.

목차 (Table of Contents)

• Abstract
  
• 1. 서론
  
• 2. 결정방위분포함수와 초음파 속도와의 관계
  
• 3. 실험
  
• 4. 결과 및 논의
  
• 5. 결론
  
• 참고문헌