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Title: Fundamental studies of stress distributions and stress relaxation in oxide scales on high temperature alloys

Abstract

The high temperature X-ray diffraction system developed for this program is being used to measure the strains which develop during oxidation. This is being applied to Ni/NiO and Cr/Cr[sub 2]O[sub 3]. Our work suggests tat the oxide and metal crystalline texture, anisotropic elastic modulus and anisotropic thermal expansion can have a pronounced effect on strain state of these systems. Acoustic emission is being used to study oxide scale failure (fracture) during oxidation. AE data from 304 stainless steel are being used to develop a statistical model of fracture process. Strength of metal/scale interface is an important property that has been difficult to quantify. Using Nano-indentation and scratch techniques developed for characterizing thin film interfaces, an effort has begun to measure the fracture toughness of the metal/scale interface. Mathematical modelling of origin and time evolution of growth stresses is an extension and improvement of previous models. The current effort employs a more sophisticated stress analysis and expands the scope to include other stress relaxation process. The interaction between the modeling studies and the X-ray diffraction measurements provides a natural credibility check to both efforts.

Authors:
; ;
Publication Date:
Research Org.:
Minnesota Univ., Minneapolis, MN (United States). Corrosion Research Center
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
7018555
Report Number(s):
DOE/ER/45337-5
ON: DE93003654
DOE Contract Number:  
FG02-88ER45337
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CHROMIUM; OXIDATION; HEAT RESISTING ALLOYS; SCALING; NICKEL; NICKEL OXIDES; ADHESION; OXIDES; STRESS RELAXATION; STRESSES; ACOUSTIC EMISSION TESTING; INTERFACES; PROGRESS REPORT; STAINLESS STEEL-304; STRESS ANALYSIS; X-RAY DIFFRACTION; ACOUSTIC TESTING; ALLOYS; AUSTENITIC STEELS; CHALCOGENIDES; CHEMICAL REACTIONS; CHROMIUM ALLOYS; CHROMIUM-NICKEL STEELS; COHERENT SCATTERING; CORROSION RESISTANT ALLOYS; DIFFRACTION; DOCUMENT TYPES; ELEMENTS; HEAT RESISTANT MATERIALS; HIGH ALLOY STEELS; IRON ALLOYS; IRON BASE ALLOYS; MATERIALS; MATERIALS TESTING; METALS; NICKEL ALLOYS; NICKEL COMPOUNDS; NONDESTRUCTIVE TESTING; OXYGEN COMPOUNDS; RELAXATION; SCATTERING; STAINLESS STEELS; STEEL-CR19NI10; STEELS; TESTING; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS; 360203* - Ceramics, Cermets, & Refractories- Mechanical Properties; 360105 - Metals & Alloys- Corrosion & Erosion

Citation Formats

Shores, D A, Stout, J H, and Gerberich, W W. Fundamental studies of stress distributions and stress relaxation in oxide scales on high temperature alloys. United States: N. p., 1992. Web. doi:10.2172/7018555.
Shores, D A, Stout, J H, & Gerberich, W W. Fundamental studies of stress distributions and stress relaxation in oxide scales on high temperature alloys. United States. https://doi.org/10.2172/7018555
Shores, D A, Stout, J H, and Gerberich, W W. 1992. "Fundamental studies of stress distributions and stress relaxation in oxide scales on high temperature alloys". United States. https://doi.org/10.2172/7018555. https://www.osti.gov/servlets/purl/7018555.
@article{osti_7018555,
title = {Fundamental studies of stress distributions and stress relaxation in oxide scales on high temperature alloys},
author = {Shores, D A and Stout, J H and Gerberich, W W},
abstractNote = {The high temperature X-ray diffraction system developed for this program is being used to measure the strains which develop during oxidation. This is being applied to Ni/NiO and Cr/Cr[sub 2]O[sub 3]. Our work suggests tat the oxide and metal crystalline texture, anisotropic elastic modulus and anisotropic thermal expansion can have a pronounced effect on strain state of these systems. Acoustic emission is being used to study oxide scale failure (fracture) during oxidation. AE data from 304 stainless steel are being used to develop a statistical model of fracture process. Strength of metal/scale interface is an important property that has been difficult to quantify. Using Nano-indentation and scratch techniques developed for characterizing thin film interfaces, an effort has begun to measure the fracture toughness of the metal/scale interface. Mathematical modelling of origin and time evolution of growth stresses is an extension and improvement of previous models. The current effort employs a more sophisticated stress analysis and expands the scope to include other stress relaxation process. The interaction between the modeling studies and the X-ray diffraction measurements provides a natural credibility check to both efforts.},
doi = {10.2172/7018555},
url = {https://www.osti.gov/biblio/7018555}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jun 01 00:00:00 EDT 1992},
month = {Mon Jun 01 00:00:00 EDT 1992}
}