Development of in-situ internal stress measurement system under fatigue loading based on high intensity pulsed neutron beams

2014 Fiscal Year Final Research Report

• Project/Area Number: 25600145
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Quantum beam science
• Research Institution: Japan Atomic Energy Agency
• Principal Investigator: AKITA Koichi 独立行政法人日本原子力研究開発機構, 原子力科学研究部門 量子ビーム応用研究センター, リーダー (10231820)
• Co-Investigator(Kenkyū-buntansha): HARJO Stefanus 独立行政法人日本原子力研究開発機構, 原子力科学研究部門 J-PARCセンター, 研究主幹 (40391263) ; ITO Takayoshi 一般財団法人総合科学研究機構, 利用研究促進部, 研究員 (00537342)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 応力 / 疲労 / パルス中性子 / 中性子回折 / その場測定

Outline of Final Research Achievements

An in-situ neutron stress measurement system has been developed at the neutron engineering diffractometer TAKUMI in the Materials and Life Science Experimental Facility (MLF) of J-PARC. The system can record experiment parameters, such as load, strain and temperature, as an event with a synchronized time tag along a same timeline for a neutron detection event by using a DAQ-Middleware and a TrigNET, which is a universal signal readout module. In-situ neutron diffraction measurements during fatigue loading have been performed using the system at TAKUMI to demonstrate its advantages. As a consequence, diffraction peak shifts which correspond to the fatigue load have been successfully recorded, and therefore the effectiveness of the system has been confirmed.

Free Research Field

材料強度