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Title: Grain boundary characterization in an X750 alloy

Abstract

Grain boundary chemistry in an X750 Ni alloy was analyzed by atom probe tomography in an effort to clarify the possible roles of elemental segregation and carbide presence on the stress corrosion cracking behavior of Ni alloys. Two types of cracks are observed: straight cracks along twin boundaries and wavy cracks at general boundaries. It was found that carbides (M23C6 and TiC) are present at both twin and general boundaries, with comparable B and P segregation for all types of grain boundaries. Twin boundaries intercept ?’ precipitates while the general boundaries wave around the ?’ and carbide precipitates. Near a crack tip, oxidation takes place on the periphery of carbide precipitate.

Authors:
; ;
Publication Date:
Research Org.:
Idaho National Laboratory (INL)
Sponsoring Org.:
DOE - NE
OSTI Identifier:
1070126
Report Number(s):
INL/CON-12-27984
DOE Contract Number:  
DE-AC07-05ID14517
Resource Type:
Conference
Resource Relation:
Conference: MRS Fall meeting,Boston, MA,11/25/2012,11/30/2012
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Atom probe tomography; Corrosion; grain boundary

Citation Formats

Kevin Fisher, Sebastien Teysseyre, and Emmanuelle Marquis. Grain boundary characterization in an X750 alloy. United States: N. p., 2012. Web.
Kevin Fisher, Sebastien Teysseyre, & Emmanuelle Marquis. Grain boundary characterization in an X750 alloy. United States.
Kevin Fisher, Sebastien Teysseyre, and Emmanuelle Marquis. Thu . "Grain boundary characterization in an X750 alloy". United States. https://www.osti.gov/servlets/purl/1070126.
@article{osti_1070126,
title = {Grain boundary characterization in an X750 alloy},
author = {Kevin Fisher and Sebastien Teysseyre and Emmanuelle Marquis},
abstractNote = {Grain boundary chemistry in an X750 Ni alloy was analyzed by atom probe tomography in an effort to clarify the possible roles of elemental segregation and carbide presence on the stress corrosion cracking behavior of Ni alloys. Two types of cracks are observed: straight cracks along twin boundaries and wavy cracks at general boundaries. It was found that carbides (M23C6 and TiC) are present at both twin and general boundaries, with comparable B and P segregation for all types of grain boundaries. Twin boundaries intercept ?’ precipitates while the general boundaries wave around the ?’ and carbide precipitates. Near a crack tip, oxidation takes place on the periphery of carbide precipitate.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {11}
}

Conference:
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