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Effect of boron addition on hydrogen embrittlement sensitivity in Fe–Ni based alloys
- Source :
- Materials Science and Engineering: A. 527:6620-6625
- Publication Year :
- 2010
- Publisher :
- Elsevier BV, 2010.
-
Abstract
- In Fe–Ni based alloys, hydrogen embrittlement sensitivity is thought to correlate well with microstructure. The effect of boron addition on microstructure of Fe–Ni austenitic alloys has been investigated. It is found that 0.002 wt.% boron addition can significantly retard the formation of η phase, and only a few continuous carbides precipitate at the grain boundaries. As the boron content increases to 0.006 wt.%, carbides at grain boundaries become discontinuous, and are finer in size than that in the alloy with 0.002 wt.% boron. Significant decrease of the percent loss of reduction of area (RA) are seen in the alloys with boron contents lower than 0.006 wt.%. However, when further increasing the boron concentration to 0.01 wt.%, an increase in the percent loss of RA is found, due to the re-appearance of η phase and boride precipitation. Appropriate addition of boron can be an effective way of lowering hydrogen embrittlement sensitivity in Fe–Ni based alloys.
- Subjects :
- Materials science
Mechanical Engineering
Alloy
Metallurgy
chemistry.chemical_element
engineering.material
Condensed Matter Physics
Carbide
Superalloy
chemistry.chemical_compound
chemistry
Mechanics of Materials
Boride
engineering
General Materials Science
Grain boundary
Austenitic stainless steel
Boron
Hydrogen embrittlement
Subjects
Details
- ISSN :
- 09215093
- Volume :
- 527
- Database :
- OpenAIRE
- Journal :
- Materials Science and Engineering: A
- Accession number :
- edsair.doi...........acbcd036d12d834b39556e9202e88141