Atom probe field ion microscopy of Type 308 CRE stainless steel welds
Conference
·
OSTI ID:10184752
- Pennsylvania State Univ., University Park, PA (United States)
- Oak Ridge National Lab., TN (United States)
Addition of controlled residual elements (CRE), such as 0.007 wt % B, to type 308 stainless steel welds, improved creep-rupture properties. In this paper, B distribution and microstructure development were studied. The microstructural evolution during high-temperature aging was found to similar to that of commercial SS308 welds. Atom probe analysis showed that B and C segregate to the ferrite-austenite interface. Thermodynamic calculations suggest that the segregation is due to preferential partitioning of B and C to the liquid during solidification. Further work is needed to study B redistribution in aging stages.
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 10184752
- Report Number(s):
- CONF-950443--2; ON: DE94019161
- Country of Publication:
- United States
- Language:
- English
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