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In the fields of aerospace and energy power, the study of microscale deformation mechanisms of high-temperature materials is a core issue in ensuring equipment reliability.
2024year9In the month, the team from the School of Energy and Power Engineering at Beihang University《Optics and Lases in Engineering》An important research achievement was published in the journal, proposing a method for preparing heat-resistant gratings based on UV lithography and magnetron sputtering processes, which was successfully applied to nickel based single crystal high-temperature alloys（NBSC）In1000Measurement of microscale deformation at ℃. The Fruit Instrument5000N 1200The ℃ ultra-high temperature stretching table, as the core equipment, provides precise support for the high-temperature in-situ mechanical experiments of this study, helping the research team break through the bottleneck of high-temperature measurement technology.
Article Title:《Fabrication of microscale heat-resistant grating for in-situ high temperature deformation measurement by sampling moiré method
How to translateJournal Name:《
Optics and Lases in Engineering
How to translateClient Unit:Beihang University
Application products:
Fruit Instrument9005000N 1200℃ ultra-high temperature stretching tableTechnical FeaturesThe microscale plastic deformation of nickel based high-temperature alloys directly affects the material failure mechanism at ultra-high temperatures, but traditional gratings are prone to failure at high temperatures, resulting in insufficient measurement accuracy. Research needs to be conducted in
℃~1000Apply tensile load to the sample in a ℃ environment and synchronously capture the deformation data of the grating. The temperature control accuracy, mechanical loading stability, and anti-interference ability of this experimental equipment have been proposed
1. Very high requirements.Fruit Instrument12005000N 12000.1The ℃ ultra-high temperature stretching table has become a key support for research due to the following advantages:
2. Ultra high temperature stability:Can be stored at room temperature toAccurate temperature control within the range of ℃, with temperature fluctuations of ≤±℃, ensuring stable observation of the grating;High precision mechanical loading:maximum load5000N, loading rate
0.1~500
M
m/minAdjustable to meet the dynamic requirements of micrometer level deformation measurement;Integrated experimental system for ultra-high temperature stretching of fruit instruments900Empowering research50 In the study, the team used fruit instruments and ultra-high temperature stretching tables toNBSCConduct in-situ heating and tensile tests on the sample. The device provides real-time feedback through heating elements and thermocouples to heat the sample
℃ and maintain a constant temperature, while
M
m/min
Apply tensile load at a certain rate. By integrating digital optical microscopes, researchers have successfully captured dynamic deformation images of heat-resistant gratings at high temperatures, and quantified the strain field distribution based on the sampling moir é method.
Deformation image of heat-resistant grating of NBSC sample at 900 ℃ (top) and phase difference distribution (bottom)
The experimental results indicate that:
At a high temperature of 1000 ℃, the grating maintains a complete periodic structure with a spacing of 8 μ m, and there is no significant attenuation in contrast;
When the tensile load reaches 763.7 MPa, the grating is fully attached to the substrate, accurately revealing the strain concentration and slip band evolution in the 45 ° symmetrical region below the notch.Related ProductsIn situ stretching hot and cold tableSEM ultra-high temperature stretching tableTemperature range:
-190~6000.1℃
/RT~1200℃
Temperature stability: ±℃
Power range:0~5000N
Force accuracy:10.5%FSDisplacement distance:
