Method for predicting alpha sub-phase morphology through titanium alloy beta parent phase crystal orientation

A crystal orientation, titanium alloy technology, applied in chemical process analysis/design, special data processing applications, instruments, etc., can solve the problems of inconvenient popularization and application, complex process, etc., to achieve simplicity and practicability, good comparative analysis, The effect of simplifying the operation process

Pending Publication Date: 2022-01-04
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Problems solved by technology

However, these simulation methods belong to the microscopic or mesoscopic category, need to introduce too many thermodynamic and kinetic parameters, and the process is relatively complicated, which is not easy to be popularized and applied in production practice

Method used

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  • Method for predicting alpha sub-phase morphology through titanium alloy beta parent phase crystal orientation
  • Method for predicting alpha sub-phase morphology through titanium alloy beta parent phase crystal orientation
  • Method for predicting alpha sub-phase morphology through titanium alloy beta parent phase crystal orientation

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Embodiment 1

[0034] For TC25G titanium alloy homogeneous electron beam welded joints and inertial friction welded joints, the samples are subjected to solution annealing at 960°C, 2h / AC+540°C, 6h / AC heat treatment system; then the weld seam is the center, and the size is 20mm ×15mm×10mm sample for microstructure characterization and micro-domain orientation characterization; such as figure 1 figure 2 Establish the sample coordinate system. The electron beam welding joint coordinate system is composed of the welding direction (WD), the normal direction (ND) and the cross-section direction (TD) perpendicular to each other. The ND-TD section is used as the observation plane; the inertial friction welding ring piece coordinates The tangential direction (TD) is perpendicular to the axial direction (AD) and radial direction (RD) respectively, and the AD-TD section is used as the observation surface; the sample surface is ground and polished to a mirror surface and then used Kroll reagent (96ml ...

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Abstract

The invention relates to a method for predicting alpha sub-phase morphology through titanium alloy beta parent phase crystal orientation, and the method employs an orientation-trace method to realize simulation calculation of a statistical law of the alpha sub-phase morphology through beta parent phase crystal orientation. According to the method, through an orientation-trace method, an alpha-phase variant trace direction generated by phase change is calculated by using beta-phase crystal orientation data, an included angle between the trace direction and an X axis in a sample coordinate system is taken as an alpha-phase morphology feature, and frequency distribution statistical analysis is performed on the included angle. The method provided by the invention not only can determine the spatial orientation of the alpha sub-phase, but also has important reference significance for predicting, regulating and controlling the alpha-phase morphology of a lath.

Description

technical field [0001] The invention belongs to the field of titanium-based alloys, and in particular relates to a method for predicting the morphology of an alpha subphase through the crystal orientation of a beta parent phase of a titanium alloy. Background technique [0002] Titanium alloy has the advantages of high specific strength, good specific stiffness, corrosion resistance and high temperature resistance, and has become the material of choice in aerospace, navigation and other fields. In the α+β two-phase titanium alloy, as the volume fraction of flaky α laths decreases and the volume fraction of equiaxed α phase increases, the common microstructure types of titanium alloys can be divided into four categories: Widmanstatten structure, Basket tissue, bi-state tissue, and isometric tissue. Through the regulation of thermal processing and subsequent heat treatment process, titanium alloys with different microstructure characteristics can be obtained, and their mechan...

Claims

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Application Information

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IPC IPC(8): G16C20/10G06F30/20G06F119/14
CPCG16C20/10G06F30/20G06F2119/14
Inventor 赵子博刘远宏王清江
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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