Radiation induced grain boundary segregation in ferritic/martensitic steels
The radiation induced segregation of Cr at grain boundaries (GBs) in Ferritic/Martensitic steels was modeled assuming vacancy and interstitialcy diffusion mechanisms. In particular, the dependence of segregation on temperature and grain boundary misorientation angle was analyzed. It is found that Cr...
Main Authors: | , , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Elsevier
2020-01-01
|
Series: | Nuclear Engineering and Technology |
Online Access: | http://www.sciencedirect.com/science/article/pii/S173857331930141X |
id |
doaj-e77c2f2ab638478a8e386f111fb78a67 |
---|---|
record_format |
Article |
spelling |
doaj-e77c2f2ab638478a8e386f111fb78a672020-11-25T01:58:34ZengElsevierNuclear Engineering and Technology1738-57332020-01-01521148154Radiation induced grain boundary segregation in ferritic/martensitic steelsL.D. Xia0Y.Z. Ji1W.B. Liu2H. Chen3Z.G. Yang4C. Zhang5L.-Q. Chen6Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, ChinaDepartment of Materials Science and Engineering, The Pennsylvania State University, University Park, PA, 16802, USADepartment of Nuclear Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, ChinaKey Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, ChinaKey Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, ChinaKey Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China; Corresponding author.Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA, 16802, USAThe radiation induced segregation of Cr at grain boundaries (GBs) in Ferritic/Martensitic steels was modeled assuming vacancy and interstitialcy diffusion mechanisms. In particular, the dependence of segregation on temperature and grain boundary misorientation angle was analyzed. It is found that Cr enriches at grain boundaries at low temperatures primarily through the interstitialcy mechanism while depletes at high temperatures predominantly through the vacancy mechanism. There is a crossover from Cr enrichment to depletion at an intermediate temperature where the Cr:Fe vacancy and interstitialcy diffusion coefficient ratios intersect. The bell-shape Cr enrichment response is attributed to the decreasing void sinks inside the grains as temperature rises. It is also shown that low angle grain boundaries (LAGBs) and special Σ coincidence-site lattice (CSL) grain boundaries exhibit suppressed radiation induced segregation (RIS) response while high angle grain boundaries (HAGBs) have high RIS segregation. This different behavior is attributed to the variations in dislocation density at different grain boundaries. Keywords: Radiation induced segregation, Ferritic/martensitic, Temperature, Grain boundary structurehttp://www.sciencedirect.com/science/article/pii/S173857331930141X |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
L.D. Xia Y.Z. Ji W.B. Liu H. Chen Z.G. Yang C. Zhang L.-Q. Chen |
spellingShingle |
L.D. Xia Y.Z. Ji W.B. Liu H. Chen Z.G. Yang C. Zhang L.-Q. Chen Radiation induced grain boundary segregation in ferritic/martensitic steels Nuclear Engineering and Technology |
author_facet |
L.D. Xia Y.Z. Ji W.B. Liu H. Chen Z.G. Yang C. Zhang L.-Q. Chen |
author_sort |
L.D. Xia |
title |
Radiation induced grain boundary segregation in ferritic/martensitic steels |
title_short |
Radiation induced grain boundary segregation in ferritic/martensitic steels |
title_full |
Radiation induced grain boundary segregation in ferritic/martensitic steels |
title_fullStr |
Radiation induced grain boundary segregation in ferritic/martensitic steels |
title_full_unstemmed |
Radiation induced grain boundary segregation in ferritic/martensitic steels |
title_sort |
radiation induced grain boundary segregation in ferritic/martensitic steels |
publisher |
Elsevier |
series |
Nuclear Engineering and Technology |
issn |
1738-5733 |
publishDate |
2020-01-01 |
description |
The radiation induced segregation of Cr at grain boundaries (GBs) in Ferritic/Martensitic steels was modeled assuming vacancy and interstitialcy diffusion mechanisms. In particular, the dependence of segregation on temperature and grain boundary misorientation angle was analyzed. It is found that Cr enriches at grain boundaries at low temperatures primarily through the interstitialcy mechanism while depletes at high temperatures predominantly through the vacancy mechanism. There is a crossover from Cr enrichment to depletion at an intermediate temperature where the Cr:Fe vacancy and interstitialcy diffusion coefficient ratios intersect. The bell-shape Cr enrichment response is attributed to the decreasing void sinks inside the grains as temperature rises. It is also shown that low angle grain boundaries (LAGBs) and special Σ coincidence-site lattice (CSL) grain boundaries exhibit suppressed radiation induced segregation (RIS) response while high angle grain boundaries (HAGBs) have high RIS segregation. This different behavior is attributed to the variations in dislocation density at different grain boundaries. Keywords: Radiation induced segregation, Ferritic/martensitic, Temperature, Grain boundary structure |
url |
http://www.sciencedirect.com/science/article/pii/S173857331930141X |
work_keys_str_mv |
AT ldxia radiationinducedgrainboundarysegregationinferriticmartensiticsteels AT yzji radiationinducedgrainboundarysegregationinferriticmartensiticsteels AT wbliu radiationinducedgrainboundarysegregationinferriticmartensiticsteels AT hchen radiationinducedgrainboundarysegregationinferriticmartensiticsteels AT zgyang radiationinducedgrainboundarysegregationinferriticmartensiticsteels AT czhang radiationinducedgrainboundarysegregationinferriticmartensiticsteels AT lqchen radiationinducedgrainboundarysegregationinferriticmartensiticsteels |
_version_ |
1724968895540887552 |