Construction method for representative volume element model of Ni3Al-based alloy

A technology of volume unit and construction method, applied in the field of aerospace materials, can solve the problem that the distribution of the strengthening phase γ' phase is not completely ordered, and achieve the effect of effective mechanical response

Active Publication Date: 2017-07-07
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0002] studying Ni 3 When the γ′ / γ structure inside the Al-based alloy is studied, researchers usually study it in the form of a unit cell, but in fact the distribution of the strengthening phase γ′ phase inside the material is not completely ordered, and the analysis using the unit cell The influence of the inhomogeneity of the strengthening phase distribution on the material properties is ignored

Method used

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  • Construction method for representative volume element model of Ni3Al-based alloy
  • Construction method for representative volume element model of Ni3Al-based alloy
  • Construction method for representative volume element model of Ni3Al-based alloy

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Experimental program
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Embodiment

[0059] 1. A kind of Ni 3Al-based alloy representative volume element (RVE) model construction method, such as figure 1 shown, including the following steps:

[0060] 1), using a scanning electron microscope to obtain the observation map of the microstructure of the material, such as figure 2 Shown is the microstructure diagram of IC10 alloy;

[0061] 2), by strengthening the phase volume fraction w p , strengthening phase size l p and the strengthening phase shape parameter n p Three microscopic geometric characteristic parameters are used to describe the microstructure observation map of the material.

[0062] 2-1), the volume fraction of strengthening phase (w p )

[0063] In ImagePro plus (IPP) software, the area that needs to be measured in the picture is called AOI (area of ​​interest), and color recognition is one of the most effective methods. This article is the method of color recognition used for Ni 3 The microstructure diagram of the Al-based alloy is iden...

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Abstract

The invention discloses a construction method for a representative volume element (RVE) model of an Ni3Al-based alloy. The method comprises the steps that (1) an alloy microstructure is observed through a scanning electron microscope; (2) the distribution law of microcosmic geometrical characteristic parameters of the alloy microstructure is subjected to analytical statistics; (3) a constraint condition of a strengthening phase in an RVE is set; (4) coordinates of a key point of the strengthening phase in the RVE are generated; and (5) the RVE is generated. The method has the advantages that the generated RVE contains sufficient microcosmic information, covers microcosmic uncertainty of a material and can effectively describe mechanical properties in the material; by adopting the generated RVE to carry out mechanical analysis, a mechanical response of the material under a load can be predicted more effectively, and therefore the method has certain scientific theory significance and engineering application value.

Description

technical field [0001] The invention belongs to the technical field of aviation materials, and in particular relates to the construction of a micro-representative volume element (RVE) model of a directionally solidified superalloy material for an aircraft engine, in particular to a Ni 3 Al-based alloys represent a method for constructing volume element (RVE) models. Background technique [0002] studying Ni 3 When the γ′ / γ structure inside the Al-based alloy is studied, researchers usually study it in the form of a unit cell, but in fact the distribution of the strengthening phase γ′ phase inside the material is not completely ordered, and the analysis using the unit cell The influence of the inhomogeneity of the strengthening phase distribution on the material properties is neglected. The representative volume unit is composed of a large number of strengthening phases and matrix phases. Its scale is higher than that of the unit cell and contains more microscopic informati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 张宏建李鑫温卫东崔海涛徐颖
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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