SU953500A1 - Device for material specimen deformation - Google Patents

Description

(54) DEVICE FOR SAMPLE DEFORMATION

one

The invention relates to a testing technique, in particular, to the structural elements of devices for studying the properties of materials.

A device for studying the properties of materials is known, which contains a vacuum chamber with observation ports, a container for a cryogenic agent located in the chamber, a holder for securing the sample 1., 0

However, the mounting of the holder in the form of two coaxial heat-insulating pipes with a cryoagent flow guide located between them makes it impossible to investigate the properties of matter that has a memory effect.

The closest to the proposed technical essence and the achieved effect is a device for deforming specimens of materials with memory effect in a cryostat, containing a vacuum chamber with observation windows, a container for cryoagent, raSMATERIALS

The C-shaped sample holder and the stem-deformer {23 The disadvantage of this device is that the deformer-rod acts on the free end of the sample, deforms it at the same angle, and also does not allow to investigate the properties of materials in conditions of varying degrees of deformation.

The purpose of the invention is to expand the technological capabilities of the device.

The delivered chain is achieved by the fact that the device for deformation of material samples is equipped with a matrix mounted on the lower shelf of the holder that can be moved perpendicular to the axis of the deformer rod and having a step-shaped shape facing the last bending section in the direction of movement with different radii of individual stages, and the width of each step is selected from the conditions of the specimen width. FIG. 1 shows a device for deforming samples of materials having a memory effect in a cryostat; taa of fig. 2 is a matrix} in FIG. 3 - device, axonometric projection. The device contains a vacuum chamber 1 with observation ports 2, connected to a vacuum source (not shown). In chamber 1, a capacitance dp of a cryogenic agent (not shown) is located. Corresponding holder 3 of sample 4, a stockinformer 5. On the lower butt 6 of holder 3 there is a matrix 7 with a shank 8 having the ability to move perpendicular to the axis (not shown) of a rod deformer 5. 7 has a bending section .9 of stepped shape with steps 1O. The device also contains a clamping plate 11, a sensor 12 included in an electrical measuring circuit 13, a light source 14 and heating elements (not shown); The device works as follows. The test sample 4 in the form of a plate is fixed on the lower shelf 6 of the holder 3 by means of the clamping plate ll. Matrix 7 is set to a certain position so that during the test, sample 4 has the opportunity to contact one of its stages 1O. Chamber 1 is sealed and released from an external source (not shown). A vessel for a cryogenic agent (not shown) located in chamber 1 is filled with liquid refrigerant and sample 4 is cooled. As the temperature of sample 4 decreases below the level of the martensitic transformations of the material, it is deformed by the action of the stock transformer 5, during which movement, sample 4 bends around the corresponding stage 1 of the matrix 7. After that, the deformer 5 is retracted to its original position. With the gradual evaporation of the liquid refrigerant, the sample temperature gradually increases. The temperature increase can also be carried out using heating elements (n shown). ; When sample 4 temperature increases to the level of martensite transformations of the material, the process of restoring the original shape of sample 4 begins. The process of restoring the original shape can be visually observed through windows 2 to that special screen 15. Unpressurizing chamber 1 and rearranging the matrix 7 to different positions, repeat the sequence of operations. The proposed technical solution has the advantage over the known device, which consists in expanding the technological capabilities of the device. Expansion of technological capabilities; device for deforming samples of materials with memory effect in a cryostat is associated with the fact that it is equipped with a matrix mounted on the lower shelf of the holder with the ability to move perpendicular to the axis of the deforming shaft ii having a bending portion of a stepped shape. The presence of such a matrix in the device makes it possible to investigate the properties of materials with a memory effect with various degrees of deformation. Formulas; SUMMARY OF THE INVENTION A device for deforming material samples containing a vacuum chamber with inspection windows, a container for a cryoagent located in a chamber, a shaped sample holder and a rod-deformer, characterized in that, in order to expand technological capabilities, it is equipped with a matrix mounted on the lower shelf the holder is movable perpendicularly to the axis of the rod.a-deformer and having an inverted and last flexible part of the stepped shape in the direction of movement with different radii individual steps, and the width of each step is selected from the condition of exceeding the sample width. The source of information arinty taken into account in the examination 1. USSR author's certificate number 70222O, cl. F 25 B 3/10, 1979. 2. Author's certificate of the USSR according to the application NJ 2874753 / 23-26, кп. Q 01 .N 3/04, 1980 (prototype).

Claims (1)

Claim A device for deformation of samples of materials containing a vacuum chamber; a charger with viewing windows, a cryoagent container located in the chamber, a Conformable sample holder and a rod-deformer, characterized in that, in order to expand technological capabilities, it is equipped with a matrix mounted on the lower shelf holder with the ability to move perpendicular to the axis of the Deformer rod and having a step-shaped flexible section facing the latter and in the direction of movement with different curvatures of individual tupeney, and the width of each stage selected from the conditions exceeding the width of the specimen.