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Title: Thermal and Radiation-induced Segregation in Model Ni-base Alloys

Abstract

Since Generation IV nuclear energy systems will operate at higher temperatures than current light water reactors, Ni-base alloys are receiving attention as candidate core materials. One aspect of the radiation response of Ni-base alloys to radiation that is not well understood is grain boundary segregation. In this work, three alloys, specifically Ni-18Cr, Ni-18Cr-9Fe, and Ni-18Cr-0.08P were given a series of thermal treatments and quenching to understand the development of thermal non-equilibrium segregation (TNES). Additionally, they were irradiated using 3.2 MeV protons at temperatures from 200 to 500 C to doses up to 1 dpa. Grain boundary segregation was measured with Auger Electron Spectroscopy and Scanning Transmission Electron Microscopy with Energy Dispersive Spectroscopy. Chromium enrichment due to TNES could be caused by interactions between Ni and Cr or by interactions with impurity elements such as B, C, or N. Under irradiation, the addition of iron to Ni-18Cr reduced the grain boundary chromium depletion, while the addition of phosphorous increased the grain boundary chromium depletion.

Authors:
 [1];  [1];  [2];  [3]
  1. University of Wisconsin, Madison
  2. University of Michigan
  3. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Shared Research Equipment Collaborative Research Center
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1003506
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: TMS Radiation Effects Symposium, San Antonio, TN, USA, 20060313, 20060316
Country of Publication:
United States
Language:
English
Subject:
29 ENERGY PLANNING, POLICY AND ECONOMY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ALLOYS; AUGER ELECTRON SPECTROSCOPY; CHROMIUM; IRON; IRRADIATION; NUCLEAR ENERGY; PROTONS; QUENCHING; RADIATION EFFECTS; RADIATIONS; SEGREGATION; SPECTROSCOPY; TRANSMISSION ELECTRON MICROSCOPY; Radiation damage; radiation-induced segregation; Auger spectroscopy; analytical electron microscopy

Citation Formats

Allen, Todd R., Tan, Lizhen, Was, Gary, and Kenik, Edward A. Thermal and Radiation-induced Segregation in Model Ni-base Alloys. United States: N. p., 2006. Web.
Allen, Todd R., Tan, Lizhen, Was, Gary, & Kenik, Edward A. Thermal and Radiation-induced Segregation in Model Ni-base Alloys. United States.
Allen, Todd R., Tan, Lizhen, Was, Gary, and Kenik, Edward A. Sun . "Thermal and Radiation-induced Segregation in Model Ni-base Alloys". United States. doi:.
@article{osti_1003506,
title = {Thermal and Radiation-induced Segregation in Model Ni-base Alloys},
author = {Allen, Todd R. and Tan, Lizhen and Was, Gary and Kenik, Edward A},
abstractNote = {Since Generation IV nuclear energy systems will operate at higher temperatures than current light water reactors, Ni-base alloys are receiving attention as candidate core materials. One aspect of the radiation response of Ni-base alloys to radiation that is not well understood is grain boundary segregation. In this work, three alloys, specifically Ni-18Cr, Ni-18Cr-9Fe, and Ni-18Cr-0.08P were given a series of thermal treatments and quenching to understand the development of thermal non-equilibrium segregation (TNES). Additionally, they were irradiated using 3.2 MeV protons at temperatures from 200 to 500 C to doses up to 1 dpa. Grain boundary segregation was measured with Auger Electron Spectroscopy and Scanning Transmission Electron Microscopy with Energy Dispersive Spectroscopy. Chromium enrichment due to TNES could be caused by interactions between Ni and Cr or by interactions with impurity elements such as B, C, or N. Under irradiation, the addition of iron to Ni-18Cr reduced the grain boundary chromium depletion, while the addition of phosphorous increased the grain boundary chromium depletion.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}

Conference:
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