Semi-quantitative prediction and visualization method for mesoscopic stress and texture in alpha titanium deformation process

A semi-quantitative and textured technology, applied in the field of plastic deformation of materials, can solve the problems of difficulty in realizing texture visualization in the deformation process of α-titanium alloys, difficulty in measuring mesoscopic stress of materials, and high cost of mesoscopic stress measurement in α-titanium alloys

Active Publication Date: 2021-09-07
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
View PDF11 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem of the high cost of experimental measurement of the mesoscopic stress of α-titanium alloy by existing experimental techniques (X-ray micro-diffraction, electron backscattering diffraction technology, etc.), the difficulty in measuring the internal mesoscopic stress of the material, and

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Semi-quantitative prediction and visualization method for mesoscopic stress and texture in alpha titanium deformation process
  • Semi-quantitative prediction and visualization method for mesoscopic stress and texture in alpha titanium deformation process
  • Semi-quantitative prediction and visualization method for mesoscopic stress and texture in alpha titanium deformation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A method for semi-quantitative prediction and visualization of mesoscopic stress and texture in the deformation process of α-titanium, comprising the following steps:

[0055] Step 1. Based on the experimental characterization results of the microstructure of the α-titanium alloy, use the open source software DREAM 3D or DAMASK to establish a representative volume element model RVE including material texture.

[0056] For the XRD measurement results, the specific steps are:

[0057] (1) Obtain the texture data of the material by XRD method (such as figure 1 , including Euler angle data and corresponding weights), and the data format is converted to format 1 text data (*.txt) through a python program, such as figure 2 shown on the left;

[0058] (2) Modify the file header and file type of the text data in format 1 to format 2, such as figure 2 As shown on the right, it is applicable to the hybrid IA pre-processing program disclosed by DAMASK, after processing, the t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a semi-quantitative prediction and visualization method for mesoscopic stress and texture in an alpha titanium deformation process, which belongs to the technical field of material plastic deformation. According to the method, the problem that mesoscopic stress is difficult to obtain by an existing simulation means or experimental method is solved, and the problems of high requirements and high cost of experimental characterization of the mesoscopic stress on equipment are avoided. According to the method, a representative volume element RVE is used as a carrier to establish a crystal plasticity model, a texture obtained through EBSD characterization or XRD measurement is imported into the representative volume element RVE, the representative volume element RVE is composed of a titanium alloy alpha phase and contains texture information of an original experimental material, slippage and twinning deformation behaviors of the alpha titanium alloy are considered in subsequent crystal plasticity simulation, mesoscopic stress and texture evolution information of the material under the action of various external loads can be obtained and visualized, and the method is of great importance to research on mesoscopic stress evolution in the alpha titanium alloy deformation process and initiation and expansion of cracks induced by mesoscopic stress.

Description

technical field [0001] The invention relates to a method for semi-quantitative prediction and visualization of mesoscopic stress and texture in the deformation process of alpha titanium, and belongs to the technical field of material plastic deformation. Background technique [0002] Due to the characteristics of low density, high specific strength, high temperature performance and excellent corrosion resistance, titanium alloy has broad application prospects in the aerospace field. Among them, α-titanium and near-α-titanium alloys mainly composed of α-phase have good toughness and high yield stress. However, the hexagonal close-packed (HCP) structure often causes a large number of plastic rheological inhomogeneities on the grain scale, which in turn causes the inhomogeneity of the mesoscopic (grain scale) stress field of the material, and the study of α The mesoscopic stress in the deformation process of titanium alloy components under external load is very important for t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01N23/203G01N23/207
CPCG01N23/203G01N23/207
Inventor 甄良孟金奎姜建堂刘丽
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap