Showing and quantitative evaluation methods of gamma' phase in nickel-based superalloy

A technology of nickel-based superalloy and corrosive agent, which is applied in the preparation of test samples, instruments, scanning probe technology, etc. High and practical effect

Inactive Publication Date: 2018-11-06
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that it can only display the grain morphology of nickel-based alloys, but cannot display and evaluate the morphology of the strengthening phase γ' of nickel-based alloys

Method used

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  • Showing and quantitative evaluation methods of gamma' phase in nickel-based superalloy
  • Showing and quantitative evaluation methods of gamma' phase in nickel-based superalloy
  • Showing and quantitative evaluation methods of gamma' phase in nickel-based superalloy

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Embodiment 1

[0046] The invention provides a set of schemes for quantitatively evaluating the γ' phase content aiming at the shortcomings of the existing nickel-base superalloy metallographic quantitative evaluation. The scheme includes: 1. providing a corrosion agent with good corrosion effect and capable of displaying the γ' form of the nickel-based superalloy strengthening phase and its preparation method, and at the same time providing a corrosion method for the corrosion agent to corrode the nickel-base superalloy. The morphology of the strengthening phase γ' of the nickel-base superalloy is clearly displayed, which is beneficial to the observation and measurement of the strengthening phase γ' of the processed surface of the nickel-base superalloy. Second, on this basis, use the drawing analysis software to process the obtained microscope γ' phase pictures to obtain the volume fraction of the nickel-based superalloy γ' phase.

[0047] The whole operation flow of the present invention ...

Embodiment 2

[0065] Nickel-based superalloy GH4169 corroded by the formula of "40 milliliters of hydrochloric acid, 20 milliliters of hydrofluoric acid, 40 milliliters of ethanol, and 2 grams of copper chloride", and other processing steps are the same as in Example 1 to obtain the volume of the γ' phase in GH4169 The score is 29.82%.

[0066] G 0 (γ') is 27.53%,

[0067] The error of the amount of γ' phase obtained by comparing the formula C of this etchant with the above calculation formula is 8.3%.

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Abstract

The invention provides a scheme for quantitatively evaluating content of gamma' phase. The scheme comprises the following two aspects: firstly, a corrosive agent which has good corrosion effect and can show the strengthened phase gamma' form of nickel-based superalloy and a preparation method of the corrosive agent are provided, and a corrosion method for corroding the nickel-based superalloy by the corrosive agent is also provided. According to the corrosive agent and the corrosion method, the strengthened phase gamma' form of the nickel-based superalloy can be clearly shown, and observationand measurement of processed surface strengthened phase gamma' of the nickel-based superalloy are facilitated; on the basis, an obtained microscope gamma' phase image is processed by drawing analysissoftware, and the volume fraction of the nickel-based superalloy gamma' phase is obtained. Steps are simple, operation is convenient, and practicality is high.

Description

technical field [0001] The invention belongs to the field of metallographic corrosion of nickel-based superalloys, and in particular relates to a method for the appearance and quantitative evaluation of γ' phases of nickel-based superalloys. Background technique [0002] Nickel-based superalloy is a kind of nickel-based deformed superalloy containing a large amount of Cr, Mo, Fe elements, and Nb as the main additive element (see Table 1). It is the most widely used and highest high-temperature strength alloy among superalloys. . The structure of the nickel-based superalloy GH4169 is mainly composed of a face-centered cubic austenitic γ matrix, dispersedly distributed γ', γ", and δ phases, and a small amount of TiN and NbC. The structure and chemical composition of the main phases of GH4169 are shown in Table 2. γ The 'phase is the most important strengthening phase in nickel-based superalloys. Since the structure of γ' is similar to that of the γ matrix, the γ' phase has th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/32G01Q30/20G01Q30/02
CPCG01N1/32G01Q30/02G01Q30/20
Inventor 任小平刘战强梁晓亮王兵华杨万熠
Owner SHANDONG UNIV
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