Test method of hot corrosion performance of nickel-based single-crystal superalloy

Abstract

The invention relates to a test method of hot corrosion performance of a nickel-based single-crystal superalloy and belongs to the field of hot corrosion testing. The test method comprises the steps that multiple to-be-tested nickel-base single-crystal superalloy test pieces are provided; multiple different saline solutions are provided, wherein one or more saline solutions contain vanadium elements; each saline solution is utilized to deposit a saline film with a preset mass on the surface of each test piece, and a hot corrosion test is performed on each test piece provided with the saline film to acquire test data; and according to the test data of the hot corrosion test, a hot corrosion rate constant is determined. Through the test method, on the one hand, the saline solutions containing the vanadium elements are supplemented to perform the hot corrosion test on the test pieces, a test environment more approximate to a superalloy actual service environment is provided, and the reliability of the test is improved; and on the other hand, the saline film content on the surface of each test piece is precisely controlled, so that the accurate test data is acquired, quantitative analysis of the hot corrosion performance is benefited, and the accuracy and repeatability of the test are improved.

Description

technical field [0001] The disclosure relates to the field of hot corrosion tests, in particular to a test method for hot corrosion performance of nickel-based single crystal superalloys. Background technique [0002] Nickel-based single crystal superalloys have excellent high-temperature mechanical properties, oxidation resistance and corrosion resistance, and are widely used in the manufacture of aviation or industrial engine turbine blades. In order to obtain more excellent creep performance and good structural stability, the addition of Al (aluminum), Cr (chromium), etc., which can produce protective oxide elements such as Al (aluminum) and Cr (chromium), in the manufacture of a new generation of superalloys has reduced the content of the alloy at a higher It exhibits relatively poor oxidation resistance and thermal corrosion resistance at the service temperature. [0003] Hot corrosion refers to an accelerated oxidation phenomenon of nickel-based single crystal alloys ...

AI Technical Summary

Problems solved by technology

The hot corrosion of the alloy will accelerate the initiation and expansion of cracks on the surface of the turbine blade. When the hot corrosion of the

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