Preparation and testing method of plate-shaped tensile specimen of medium-hard α inclusion material in titanium alloy

The plate-like tensile samples of TiN inclusion materials in titanium alloys were prepared by combining thermal isostatic pressing technology and wire cutting, chemical corrosion, and grinding and doping, which solved the problem of thermal deformation characteristic data detection of TiN materials in the prior art, achieved accurate detection and data acquisition, and supported the establishment of my country's independent airworthiness system.

CN114894568BActive Publication Date: 2025-03-21INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Patent Information

Application Number
CN202210417574.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-04-20
Publication Date
2025-03-21
Estimated Expiration
2042-04-20

AI Technical Summary

Technical Problem

The prior art is difficult to accurately detect thermal deformation characteristic data of TiN inclusion materials in titanium alloys, resulting in low ultrasonic detection accuracy and lack of corresponding preparation standards and detection standards in China, which affects the establishment of my country's independent airworthiness system.

Method used

Thermal isostatic pressing technology is used to prepare TiN inclusion block materials with different nitrogen content, and plate-shaped tensile samples are prepared by combining wire cutting, chemical corrosion and manual grinding and doping, and tensile performance tests are carried out through the fixture to obtain thermal deformation characteristic data.

Benefits of technology

It has realized the accurate thermal deformation characteristic data detection of TiN materials with different nitrogen content, broken through the key technologies for the preparation and detection of tensile samples of TiN inclusion materials, filled the domestic data gap, and supported the establishment of my country's independent airworthiness system.

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Abstract

The present invention relates to the field of titanium alloy material preparation, and in particular to a method for preparing and testing a plate tensile specimen of a hard α inclusion material in a titanium alloy. The method comprises the following steps: (1) preparing TiN inclusion block materials with different nitrogen contents by hot isostatic pressing technology; (2) processing a plate tensile specimen with a transition radius of R8mm by wire cutting; (3) preparing a TiN material tensile specimen with a nitrogen content of less than 12wt%; (4) using a fixture to perform a tensile property test on the prepared plate specimen, the test temperature being 900°C to 1100°C, and the strain rate being 0.01S ‑1 ~10S ‑1 Therefore, it is possible to accurately detect the thermal deformation characteristic data of TiN materials with different nitrogen contents, break through the key technology of preparation and detection of tensile specimens of TiN inclusion materials, and solve the "bottleneck" problem of my country's independent airworthiness system.
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