Improved resistance to cyclic oxidation of a nickel-based superalloy by high temperature etching treatment (HTET)

D. Itzhak; M. Schieber; F. R. Tuler

doi:10.1016/0010-938X(80)90009-8

Improved resistance to cyclic oxidation of a nickel-based superalloy by high temperature etching treatment (HTET)

D. Itzhak, M. Schieber, F. R. Tuler

Department of Materials Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

A method to increase the cyclic oxidation resistance of a chromium and molybdenum rich nickel-based superalloy, Hastelloy-X (48 Ni22Cr18Fe9Mo), is presented, in which the cyclic oxidation resistance is increased at 1100°C. The time after which the total weight change becomes zero is increased from 100 to between 400 and 500 h. The method consists of thermally etching the alloy with gaseous hydrochloric acid (HCL) at 1100°C for approximately 0.5 h. The mechanism of the increased oxidation resistance was investigated using metallography, X-ray diffraction and electron microprobe analysis. As a result of the HTET, a thick and continuous protective subscale of Cr₈O₃ is formed during the oxidation which acts as an efficient diffusion barrier against further oxidation.

Original language	English
Pages (from-to)	413-420
Number of pages	8
Journal	Corrosion Science
Volume	20
Issue number	3
DOIs	https://doi.org/10.1016/0010-938X(80)90009-8
State	Published - 1 Jan 1980

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title = "Improved resistance to cyclic oxidation of a nickel-based superalloy by high temperature etching treatment (HTET)",

abstract = "A method to increase the cyclic oxidation resistance of a chromium and molybdenum rich nickel-based superalloy, Hastelloy-X (48 Ni22Cr18Fe9Mo), is presented, in which the cyclic oxidation resistance is increased at 1100°C. The time after which the total weight change becomes zero is increased from 100 to between 400 and 500 h. The method consists of thermally etching the alloy with gaseous hydrochloric acid (HCL) at 1100°C for approximately 0.5 h. The mechanism of the increased oxidation resistance was investigated using metallography, X-ray diffraction and electron microprobe analysis. As a result of the HTET, a thick and continuous protective subscale of Cr8O3 is formed during the oxidation which acts as an efficient diffusion barrier against further oxidation.",

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AU - Schieber, M.

AU - Tuler, F. R.

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Y1 - 1980/1/1

N2 - A method to increase the cyclic oxidation resistance of a chromium and molybdenum rich nickel-based superalloy, Hastelloy-X (48 Ni22Cr18Fe9Mo), is presented, in which the cyclic oxidation resistance is increased at 1100°C. The time after which the total weight change becomes zero is increased from 100 to between 400 and 500 h. The method consists of thermally etching the alloy with gaseous hydrochloric acid (HCL) at 1100°C for approximately 0.5 h. The mechanism of the increased oxidation resistance was investigated using metallography, X-ray diffraction and electron microprobe analysis. As a result of the HTET, a thick and continuous protective subscale of Cr8O3 is formed during the oxidation which acts as an efficient diffusion barrier against further oxidation.

AB - A method to increase the cyclic oxidation resistance of a chromium and molybdenum rich nickel-based superalloy, Hastelloy-X (48 Ni22Cr18Fe9Mo), is presented, in which the cyclic oxidation resistance is increased at 1100°C. The time after which the total weight change becomes zero is increased from 100 to between 400 and 500 h. The method consists of thermally etching the alloy with gaseous hydrochloric acid (HCL) at 1100°C for approximately 0.5 h. The mechanism of the increased oxidation resistance was investigated using metallography, X-ray diffraction and electron microprobe analysis. As a result of the HTET, a thick and continuous protective subscale of Cr8O3 is formed during the oxidation which acts as an efficient diffusion barrier against further oxidation.

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Improved resistance to cyclic oxidation of a nickel-based superalloy by high temperature etching treatment (HTET)

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