Phased array ultrasonic testing (PAUT) has performed an important role for plant maintenances. However, many parts of cast austenitic stainless steels are difficult to be inspected by UT owing to their noises from large grains. We have been noticing that depending on the PAUT conditions, (e.g. incident angles and focal depths), the tendency of echoes from defects are different from that of grain noises. Thus we have developed new PAUT system which can analyze the tendency of echoes from comprehensive PA...
英字タイトル:
Sizing Accuracy Improvement of Defects in Cast Austenitic Stainless Steel Using Post Processing Phased Array UT

1. はじめに 平成 23 年 3 月 11 日に発生した東北地方太平洋沖地震 は、東京電力福島第一原発において、深刻な原子力災害 を引き起こした。 愛媛県では、事故直後から四国電力に対し国の要求以 上のアディショナルな安全対策を求めている。 国では、事故を教訓とした新規制基準を策定し、平成 25 年 7 月 8 日には四国電力は原子力規制委員会に対し、 原子炉設置変更許可申請を提出するとともに、当県に対 し安全協定に基づき再起動に係る事前協議を提出してい る。 当県としては、平成 27 年 10 月 ......

In this study, a novel strain sensor using metal-containing diamond-like carbon films is proposed. A film of several hundred nanometer in thickness was deposited onto silicon wafer. The strain sensitivi ty was measured by the 4-point bending test. The temperature coefficient of resistance was also calculated from the resuslts of temperature dependence of the resistance. The obtained results show that t he variation of normalized resistance has the relation against the applied strain and gauge factor was ca...
英字タイトル:
Nano-cluster dispersed amorphous carbon film for strain sensor applications