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Method for improving mechanical processability of titanium alloy

A processing performance, titanium alloy technology, applied in the field of improving the mechanical processing performance of titanium alloys, can solve problems such as material failure

Inactive Publication Date: 2019-07-16
GRIMAT ENG INST CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, too high concentration of doped hydrogen will directly lead to hydrogen embrittlement, resulting in material failure, so hydrogen must be controlled within a certain range of doping concentration to obtain the best effect of improving the mechanical processing properties of titanium alloys.

Method used

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  • Method for improving mechanical processability of titanium alloy

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Embodiment

[0018] The method for utilizing hydrogen to improve the mechanical processing properties of titanium alloy comprises the following steps:

[0019] 1. Obtain the thermodynamic stability of hydrogen in titanium: the atomic structures of α-phase titanium and β-phase titanium are close-packed cubic structure and body-centered cubic structure respectively. First, in order to determine the thermodynamic stable position of hydrogen, H is placed in figure 1 The two gap positions in , calculate the thermodynamic formation energy of H, and judge the stable position of H. Further, in order to simulate and calculate different H concentrations, a supercell containing different Ti atoms is established by extending the original cell containing 2 Ti atoms for different periods in the three directions of x, y, and z. For example, Ti 16 The supercell is made of (2×2×2) Ti 2 Primary cell composition, Ti 8 Supercell (2×1×2) Ti 2 primitive cells, and so on. Put one H atom into the above unit ...

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Abstract

The invention discloses a method for improving the mechanical processability of titanium alloy. The method comprises the following steps that (1) a series of titanium alpha phase and beta phase supercells with different hydrogen concentrations are built, the most stable doping position of hydrogen and formation energy of hydrogen are obtained through computation, the thermodynamic stability of hydrogen in the alpha phase titanium and beta phase titanium is evaluated, and the influence rule of hydrogen on the structural stability of titanium is obtained; (2) the elastic modulus of the alpha phase titanium and beta phase titanium with different hydrogen concentrations is obtained through computation and simulation, the elastic modulus is compared with that of pure titanium, and the influence of hydrogen on the elastic modulus of titanium is analyzed; and (3) the optimal doping hydrogen concentration capable of improving the mechanical property of titanium to the greatest extent is acquired by analyzing the influence rule of different hydrogen concentrations on the structural stability and mechanical parameters of titanium. By adoption of method, the variation rule of influences of different hydrogen concentrations on the mechanical property of titanium alloy is precisely obtained by utilizing the computation and simulation method, thereby determining the optimal doping hydrogenconcentration, and providing effective theoretical guidance for further experimental work.

Description

technical field [0001] The invention relates to a method for improving the mechanical processing performance of titanium alloy, which belongs to the field of nonferrous metal materials. Background technique [0002] Titanium alloy has excellent yield strength and light weight. As a structural material, it is widely used in important fields such as automobile manufacturing and space industry. It is a non-ferrous metal material with extremely high application value. However, the processing performance of titanium alloys at room temperature is poor, which greatly restricts the application of titanium alloys in industrial manufacturing. Therefore, it is necessary to develop a method to effectively improve the mechanical processing properties of titanium alloys, so as to vigorously promote the development of the industrial application of titanium alloys. [0003] Alloying is an important method to improve the mechanical properties of metal materials. As a temporary alloying ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G16C20/10G16C20/20
CPCG16C10/00G16C20/10
Inventor 孙璐肖伟王建伟程磊
Owner GRIMAT ENG INST CO LTD
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