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Method for evaluating tissue uniformity of particles reinforced aluminum composite material

A technology for particle-reinforced aluminum and composite materials, which is applied in the direction of analyzing materials, material analysis by optical means, and measuring devices, which can solve the problems of large application limitations and low accuracy.

Active Publication Date: 2012-06-13
CSIC NO 12 RES INST
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for evaluating the microstructure uniformity of particle-reinforced aluminum-based composite materials, which solves the problems of low accuracy and large application limitations of the existing particle distribution uniformity evaluation method

Method used

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  • Method for evaluating tissue uniformity of particles reinforced aluminum composite material
  • Method for evaluating tissue uniformity of particles reinforced aluminum composite material
  • Method for evaluating tissue uniformity of particles reinforced aluminum composite material

Examples

Experimental program
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Embodiment

[0080] 1) Preparation of samples: Select a representative material sample block that can correctly reflect the comprehensive performance of the material, and refer to the metal microstructure testing method (GB / T13298) for sample preparation;

[0081] 2) The preparation of the metallographic grinding surface of the sample shall be ground in strict accordance with the metal microstructure detection method to ensure that the metallographic grinding surface has no grinding marks or scratches, and shall be stored dry;

[0082] 3) Random field of view collection of the same metallographic grinding surface to ensure that the particles in the metallographic two-dimensional microstructure are clear and identifiable: select 3 metallographic photos;

[0083] 4) Different micro-areas in the same field of view are divided into grids, taking into account the accuracy requirements and work efficiency of the measurement results: each picture is divided into 25 areas, such as figure 1 (a), (b...

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Abstract

The invention discloses a method for evaluating tissue uniformity of a particles reinforced aluminum composite material, base on basic theory of stereoscopy and statistics decision, by combing an image analysis technology and aiming at the particles reinforced aluminum composite material, mathematical statistics is carried out on the ideal particles uniform distribution in a microstructure, a calculating method of the particle distribution uniformity coefficient in the particles reinforced aluminum composite material is established. The uniformity coefficient of the particles distribution state in the particles reinforced aluminum composite material tissue under a practical state can be corrected. A test analysis is carried out according to the method, the tissue uniformity of the particles reinforced aluminum composite material with volume fraction of 2%-8%, the result can show that uniform degree of the particle distribution in the particles reinforced aluminum composite material. So that the evaluation method is used for objectively and scientifically evaluating the particle distribution state in the microstructure of the particles reinforced aluminum composite material with different volume fractions.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and relates to a method for detecting the uniformity of the structure of an aluminum-based composite material, in particular to a method for evaluating the uniformity of the structure of a particle-reinforced aluminum-based composite material. Background technique [0002] Researchers have done some exploratory work on the evaluation method of particle distribution uniformity of aluminum matrix composites. In order to detect the uniformity of silicon carbide particle-reinforced aluminum matrix composites, Beijing University of Aeronautics and Astronautics used the thickness-independent acoustic reflector plate (TIRP, Thickness Independent Reflector Plate) method to image the sound velocity of the material, and it can be judged by the uniformity of the image Whether the distribution of SiC particles is uniform, this method eliminates the influence of material thickness and improves th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/84
Inventor 余申卫张康虎陈鹏波何源汪勇王惠梅谢晖李丰
Owner CSIC NO 12 RES INST
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