Device for measuring dynamic fracture of a Ti2AlNb material in high-temperature environment

A technology for high temperature environment and measuring device, which is used in measuring devices, analyzing materials, and analyzing materials by optical means.

Pending Publication Date: 2020-12-08
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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Problems solved by technology

[0003] In summary, the existing technology cannot measure the dynamic fracture of materials in high temperature environment

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  • Device for measuring dynamic fracture of a Ti2AlNb material in high-temperature environment

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Embodiment Construction

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Apparently, the described embodiments are some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0025] The features of various aspects of the embodiments of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be pra...

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Abstract

The invention relates to a device for measuring the dynamic fracture of a Ti2AlNb material in a high-temperature environment. The measuring device comprises two sets of optical testing systems, two kinds of optical image changes caused by sample deformation are measured at the same time, and then a stress intensity factor and a crack tip stress field are calculated. Laser is emitted through a laser device, a laser point light source is expanded into a laser area light source through a beam expander, the laser becomes parallel light after passing through a collimating mirror, and the parallel light reaches a sample through a high-temperature environment box with a transparent window after reaching a semi-reflecting and semi-transmitting lens to be reflected; and after reaching the surface of the sample, the light is reflected by the emission film and reaches the high-speed camera through the transparent window via the semi-reflecting semi-transmitting lens. The speckle pattern reaches the surface of the sample through the other semi-reflecting semi-transmitting lens and the transparent window after being reflected by the semi-reflecting semi-transmitting lens, and reaches the high-speed camera through the transparent window and the semi-reflecting semi-transmitting lens after being reflected by the emission film after reaching the surface of the sample; the dynamic fracture parameters of the material can be calculated according to the geometric dimension of the optical image and the change of the speckle image received by the high-speed camera.

Description

technical field [0001] The invention belongs to the technical field of material dynamic fracture measurement, in particular to a Ti 2 AlNb material dynamic fracture optical measurement device for Ti 2 Research on the mechanical behavior of dynamic crack initiation, propagation and failure of AlNb materials under high temperature environment. Background technique [0002] Existing about Ti 2 The research on the dynamic fracture mechanical behavior of AlNb materials mainly focuses on contact measurement methods, such as strain gauges. Especially for those involved in being able to measure Ti in situ at high temperature 2 The experimental device for the dynamic fracture performance of AlNb material has not been reported. However, quantitative testing and characterization of crack initiation, growth and failure of materials under dynamic loading is extremely important for material mechanical design, reliability design and safe service. [0003] In summary, the existing tech...

Claims

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Application Information

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IPC IPC(8): G01N21/84G01N3/00
CPCG01N21/84G01N3/00
Inventor 王彦菊周毅李兴无
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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