Method for quantitatively analyzing EBSD measured body-centered cubic alloy solidification structure grain sizes

A technology for quantitative analysis and solidification structure, applied in the direction of measuring devices, analyzing materials, and using wave/particle radiation for material analysis, etc., can solve problems such as the inability to evaluate grain size
CN103902841AInactive Publication Date: 2014-07-02HARBIN UNIV OF SCI & TECH
5 Cites 8 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HARBIN UNIV OF SCI & TECH
Publication Date
2014-07-02
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a method for quantitatively analyzing measured body-centered cubic alloy solidification structure grain sizes, in particular to a method for quantitatively analyzing EBSD measured body-centered cubic alloy solidification structure grain sizes. The purpose is to solve the technical problem that because dendritic structures, not grain structures, are currently measured through EBSD, the grain sizes can not be evaluated. The method includes the steps that step1, EBSD data are obtained; step2, a two-dimensional array is established; step3, a rotation matrix and a growth orientation matrix are established; step4, primary-precipitated phase elements are endowed with attributes; step5, the dendritic structures are evolved as the grain structures; step6, the equivalent diameters of grains are calculated; step7, the average equivalent diameter of the grains in the gravity direction is calculated. The method not only can analyze the grain structures, but also can analyze the dendritic structures, the sizes and distribution characteristics of the grains can be evaluated, and mechanical performance is evaluated with the help of a grain size grade standard. The method is applied to the EBSD measured body-centered cubic alloy solidification structure grain sizes.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a method for quantitatively analyzing and measuring the grain size of the solidified structure of a body-centered cubic alloy. Background technique

[0002] The size of grains formed during the solidification of metal castings has an important influence on the mechanical properties of castings. Compared with coarse grains, fine grains can effectively improve the toughness, shape, hardness and strength of metal castings, weaken intergranular segregation defects, and promote the discrete distribution of shrinkage porosity defects. Therefore, quantitative evaluation of the size of the grain structure during the solidification process of castings not only helps us evaluate the mechanical properties of castings during use, but also serves as a powerful evidence for us to deeply understand the casting process, clarify the solidification principle, and further optimize the casting process.

[0003] EBSD (Electron Backscatter Diffract...

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