http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
ALSI4140鋼의 超音波減度와 機械的 性質의 相互關係에 關한 硏究
朴宗賢,郭慶眞,朴大英,宋振泰 韓國非破壞檢査學會 1985 한국비파괴검사학회지 Vol.4 No.2
A study has been made on the correlation between ultrasonic attenuation and mechanical properties with different prior austenite grain size. It was found that ultrasonic attenuation is increased with increasing grain size, decreasing yield strength and increasing charpy impact energy value for ALSI 4140 steel.
초음파를 이용한 경사진 반사체의 검출 능력 및 크기 평가에 관한 연구
박대영,박종현,홍순신,곽경진 韓國非破壞檢査學會 1986 한국비파괴검사학회지 Vol.6 No.1
The ultrasonical characteristics of inclined planar reflectors is investigated by the maximum amplitude method. The reflected ultrasound is varied by the reflector size,shape,inclination and using transducers. It was found that the detecting ability for planar reflectors was decreased with increasing transducer size and misorientation angle and increased with decreasing ultrasonic frequency, also the misorientation angle of planar reflectors affected significantly for the measurement of refklector size.