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Competitive grain boundary segregation of phosphorus and carbon governs delamination crack in a ferritic steel
- Source :
- Materials Characterization. 145:454-460
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- The present study aims at unveiling the influence of trace amounts of phosphorus on the macro-scale delamination in a ferritic steel. Two different steels with trace amounts of phosphorus were examined to reveal the cause: One was made by long-time high temperature holding to maximize the phosphorus segregation, and the other one was made by short-time high temperature holding to minimize the phosphorus segregation. The atom probe results at the grain boundaries ahead of the delamination-related cracks provide a strong evidence that phosphorus-enrichment and carbon-depletion for the long-time high temperature holding induces a larger degree of delamination as compared to the short-time high temperature holding. Reasons for the different segregation tendency were discussed by correlating the isothermal holding time at high temperature and the competitive segregation between phosphorus and carbon.
- Subjects :
- 010302 applied physics
Materials science
Trace Amounts
Mechanical Engineering
Phosphorus
Metallurgy
Delamination
chemistry.chemical_element
02 engineering and technology
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Isothermal process
Degree (temperature)
chemistry
Mechanics of Materials
0103 physical sciences
General Materials Science
Grain boundary
0210 nano-technology
Carbon
Holding time
Subjects
Details
- ISSN :
- 10445803
- Volume :
- 145
- Database :
- OpenAIRE
- Journal :
- Materials Characterization
- Accession number :
- edsair.doi...........3d45edaee810d2653c5171bf78e8082e