In-situ mechanics testing device with high-temperature and mechanical loads for neutron diffraction.
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| Titel: | In-situ mechanics testing device with high-temperature and mechanical loads for neutron diffraction. |
|---|---|
| Autoren: | Shao, He1,2 (AUTHOR), Yu, Zhonghan1,2 (AUTHOR), Xing, Wenjuan1,2 (AUTHOR), Wang, Yandong3 (AUTHOR), Liu, Changyi2,4,5 (AUTHOR), He, Futao1,2 (AUTHOR), Chen, Jie6,7 (AUTHOR), Zheng, Haibiao6,7 (AUTHOR), Tan, Zhijian6,7 (AUTHOR), Yu, Chaoju6,7 (AUTHOR), Zhang, Shizhong1,2,5 (AUTHOR) szzhang@jlu.edu.cn, Zhao, Hongwei1,2,5 (AUTHOR) hwzhao@jlu.edu.cn |
| Quelle: | Measurement (02632241). Nov2025, Vol. 255, pN.PAG-N.PAG. 1p. |
| Schlagwörter: | *MECHANICAL loads, *GAS turbine blades, *NEUTRON diffraction, *COMPRESSION loads, *ALLOY testing |
| Abstract: | • In-situ high-temperature mechanical testing apparatus under neutron diffraction. • Optical calibration system to minimize assembly errors. • In-situ tensile experiment of 304 stainless steel and single-crystal superalloy. • Strain evolution and stress partitioning were analyzed in high-temperature alloys. High-temperature alloys are essential materials for aero-engine and gas turbine blades, designed to withstand extreme service conditions involving temperatures of 500 °C–1400 °C and complex mechanical loads. These conditions demand materials with high strength, toughness, and exceptional ultra-high-temperature performance. Temperature and load significantly influence the microstructure and service performance of high-temperature alloys. Neutron diffraction has emerged as a vital analytical tool for studying the mechanisms of high-temperature alloys due to its ability to precisely reveal crystal structures and microscopic properties. However, the unique crystal structure of single-crystal high-temperature alloys poses challenges for effective testing and analysis under neutron diffraction conditions. This study introduces a novel in-situ Mechanics Testing Device with High Temperature and Mechanical Loads (MTDHTML), developed for integration with the Energy-Resolved Neutron Imaging Instrument at the China Spallation Neutron Source. The apparatus enables in-situ neutron diffraction testing under static tensile and compressive loads of up to 60 kN and temperatures reaching 1400 °C. A dedicated collimating and focusing precision optical system was designed to measure and adjust parallelism errors between the loading axes and to monitor dynamic coaxiality errors of the spin axis in real time. An error model was established to optimize coaxiality and straightness, ensuring the measurement accuracy meets stringent requirements. The device was validated through in-situ tensile tests on single-crystal superalloy and 304 stainless steel under neutron diffraction. Results demonstrate that the MTDHTML apparatus accurately captures the microstructural evolution of materials, providing critical insights into the mechanical behavior of high-temperature alloys under complex loading conditions. [ABSTRACT FROM AUTHOR] |
| Datenbank: | Academic Search Index |
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