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Experimental Method for Isothermal Local Loading Forming of Titanium Alloys

A technology of isothermal local loading and local loading, applied in the field of thermal processing, can solve the problems of difficult to observe the structure of the specific deformation area, difficult to assemble the mold and the blank, unable to realize the transition area, etc. , the effect of improving the success rate of the experiment

Inactive Publication Date: 2016-06-01
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the difficulty in assembling molds and blanks in the existing physical simulation technology of uneven deformation in the transition zone under isothermal local loading, the success rate of the experiment is low, the observation of the tissue in the specific deformation area is difficult, and the given degree of uneven deformation and deformation gradient in the transition zone cannot be quantified Insufficient simulation, the present invention proposes an experimental method for isothermal local loading forming of titanium alloy

Method used

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  • Experimental Method for Isothermal Local Loading Forming of Titanium Alloys
  • Experimental Method for Isothermal Local Loading Forming of Titanium Alloys
  • Experimental Method for Isothermal Local Loading Forming of Titanium Alloys

Examples

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Embodiment 1

[0032] This embodiment is an experimental method for isothermal local loading forming of titanium alloy.

[0033] In this example, a 20-ton high-temperature mechanical testing machine is used to complete the isothermal local loading forming, and the method of step-by-step loading of the mold and the flat mold at high temperature is used to simulate the isothermal local loading of TA15 titanium alloy in combination with the system design of the blank, mold size and loading reduction. The inhomogeneous deformation characteristics of the forming transition zone are used to realize the simple experimental research on the microstructure evolution of the transition zone.

[0034] The sample used in this embodiment is a cubic blank made of TA15 titanium alloy. The height H of the blank b = 14mm, the length of the shorter side of the horizontal rectangular section of the billet is 18mm. The phase transition point T of the TA15 titanium alloy β is 990°C, the simulation requirements ...

Embodiment 2

[0059] This embodiment is an experimental method for isothermal local loading forming of titanium alloy. In this example, the step-by-step loading method of the mold and the flat die at high temperature is used, combined with the system design of the blank and mold size and the loading reduction, to simulate the uneven deformation characteristics of the transition zone of the isothermal local loading of the TA15 titanium alloy, and to realize the microstructure evolution of the transition zone. Simple experimental research.

[0060] The sample used in this embodiment is a cubic blank made of TA15 titanium alloy. The height H of the blank 2 b = 14mm, the length of the shorter side of the horizontal rectangular section of the billet is 18mm. The phase transition point T of the TA15 titanium alloy β is 990°C, the simulation requirements for the deformation characteristics of the transition zone are: the deformation temperature is T β -80°C, the deformation loading speed is 0....

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Abstract

The invention discloses an experimental method for isothermal local loading formation of a titanium alloy. By adopting a terrace die to increase the stability of a die and a blank which are matched, the problem that a test sample and an arc-shaped die are easy to deviate to be unstabilized in the assembling process is solved, and the experimental success rate is remarkably increased. Inhomogeneous deformation of a local loading formation transition region is realized by way of loading in steps by using the terrace die and not using the terrace die. Die processing and experimental operation are simple, convenient and feasible and well reflect the deformation characteristic of the transitional region in local loading formation. According to the experimental method disclosed by the invention, the deformation gradient of the blank is more uniform, easy to control and convenient for subsequent tissue observation of a special deformation region compared with that of an arc-shaped die, and thus a good experimental foundation is provided for quantitative research which discloses microstructure development mechanism and rule in the transitional region in isothermal local loading formation of the titanium alloy.

Description

technical field [0001] The invention relates to the field of thermal processing, in particular to a physical simulation experiment method for research on the microstructure evolution of a titanium alloy isothermal local loading forming transition zone, which can quantitatively reflect the non-uniform deformation characteristics of the transition zone. Background technique [0002] Titanium alloy large and complex components (such as aircraft bulkheads, etc.) have the characteristics of light weight, high performance and high reliability, and are widely used in aviation and aerospace fields. The isothermal local loading forming process provides a new and effective way for the precision forming of such large and complex titanium alloy components. However, its forming process is a complex process with multiple passes, multiple steps, and multiple fires. It continuously changes the loading position, gradually accumulates local deformation, and finally completes the forming of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/18
Inventor 杨合樊晓光高鹏飞雷鹏辉
Owner NORTHWESTERN POLYTECHNICAL UNIV
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