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Method for detecting intragranular segregation degree of 7-series aluminum alloy

A technology of intragranular segregation and detection methods, which is applied in the direction of measuring devices, analyzing materials, and using wave/particle radiation for material analysis, etc., can solve the problems that there are no convenient and fast testing methods or standards

Pending Publication Date: 2022-06-28
SHANGHAI JIAO TONG UNIV +1
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  • Application Information

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Problems solved by technology

[0004] For the measurement of alloy ingot grain size, GB\T6394-2017 "Metal Average Grain Size Measurement Method" has made a detailed description and has been widely used, but for the detection of the degree of intragranular segregation of metal materials, there is currently no There is no convenient and quick test method or standard

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  • Method for detecting intragranular segregation degree of 7-series aluminum alloy
  • Method for detecting intragranular segregation degree of 7-series aluminum alloy
  • Method for detecting intragranular segregation degree of 7-series aluminum alloy

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[0029] The terms "first", "second", "third", etc. are only used for distinguishing descriptions, and do not denote sequence numbers, nor can they be construed as indicating or implying relative importance.

[0030] Furthermore, the terms "horizontal", "vertical", "overhanging" etc. do not imply that a component is required to be absolutely horizontal or overhang, but rather may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", it does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0031] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "inside", "outside", "left", "right", "upper", "lower", etc. are based on those shown in the accompanying drawings. The orientation or positional relationship, or the orientation or positional relationship that the product of the application is usuall...

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Abstract

The invention discloses a 7-series aluminum alloy crystal segregation degree detection method, and relates to the technical field of aluminum alloy material physical and chemical detection.The aluminum alloy crystal segregation degree detection method comprises the steps that an aluminum alloy casting is treated, and a metallographic sample is obtained; working parameters of the detection equipment are debugged, a clear tissue image of the metallographic sample is obtained, energy spectrum analysis is conducted on different positions of the tissue image, and component test results of different positions in the crystal grains are obtained; and analyzing a component test result, and calculating to obtain the aluminum alloy crystal segregation degree. Therefore, by detecting the intragranular segregation degree of the aluminum alloy, the intragranular segregation degree of the aluminum alloy can be quickly mastered.

Description

technical field [0001] The present application relates to the technical field of physical and chemical detection of aluminum alloy materials, and in particular, to a method for detecting the degree of intragranular segregation of 7-series aluminum alloys. Background technique [0002] Segregation is the uneven distribution of alloying elements on different scales in an ingot or casting. Due to the characteristics of non-equilibrium solidification and the different contents of alloying elements between liquid and solid phases during solidification, the solidification of alloys is accompanied by different degrees of microsegregation. Microsegregation often occurs in the grains, although the size range is small, but this segregation has a great impact on the mechanical properties, corrosion resistance, physical properties and casting process performance of castings. 7-series aluminum alloys (Al-Zn-Mg-Cu alloys) are widely used in the automotive industry and aerospace fields du...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/2251G01N23/227G01N23/203
CPCG01N23/2251G01N23/227G01N23/203
Inventor 陆树生张佼韩延峰张炜姜海涛赵巍
Owner SHANGHAI JIAO TONG UNIV