Dilatometer for neutron diffractometer

Abstract

The invention relates to a dilatometer for a neutron diffractometer. The dilatometer is used for detecting the internal residual stress and expansion coefficient simultaneously, the dilatometer of theneutron diffractometer comprises a sealed container, samples are contained in the sealed container, the dilatometer of the neutron diffractometer further comprises a balanced clamping structure whichcomprises a clamping plate, a central rotating shaft, two connecting rod structures and two clamping rods, the central rotating shaft is rotationally installed on the clamping plate, each connectingrod structure is slidably installed on the clamping plate, one end of each connecting rod structure is rotationally connected with the central rotating shaft, the other end of each connecting rod structure is fixedly connected with one clamping rod, and the two clamping rods stretch into the sealed container to clamp the samples; when the samples are expanded, the balanced clamping structure keepsthe sample center position unchanged, and then it is guaranteed that the neutron stress measurement position is not changed all the time.

Description

technical field [0001] The invention relates to a dilatometer, in particular to a dilatometer used for a neutron diffraction spectrometer. Background technique [0002] In-situ testing of metal materials usually needs to be carried out at high or low temperatures, such as measuring expansion coefficient, internal residual stress, phase transition, etc. In order to establish the relationship between the phase transition characteristics of metal materials and internal residual stress, two experiments are usually required, so the experiment cannot establish effective data connection. When in-situ stress measurement and expansion coefficient determination are performed on the same sample, the identity of the measurement position cannot be guaranteed, and the expansion coefficient or internal microstructure of the sample will change due to heating twice. Therefore, it is of great significance to develop a dilatometer that ensures that the measurement position of the sample does ...

AI Technical Summary

Problems solved by technology

In order to establish the relationship between the phase transition characteristics of metal materials and internal residual stress, two experiments are usually required, so the experiment cannot establish effective data connection

When in-situ stress measurement and expansion coefficient determination are performed on the same sample, the identity of the measurement position cannot be guaranteed, and the expansion coefficient or internal microstructure of the sample will change due to heating twice.

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