Abstract
Impurity segregation in austenitic stainless steels has
usually been studied by using surface heating experiments
in Auger electron spectrometer. Although direct studies
of grain boundary segregation would be preferable, there
is a difficulty of achieving intergranular fracture in
these ductile materials in the Auger electron
spectrometer.
After hydrogen charging of the specimens the grain
boundaries of sensitized austenitic stainless steels can
be broken up. The compositions of grain boundaries in two
sensitized austenitic stainless steels (AISI 304 and AISI
321) are obtained. Also the depth distribution of
segregated species will be given, depicting the layered
segregation profiles of phosphorus and sulfur.
An example of impurity segregation at the interdendritic
fracture surface of a hot crack in an austenitic
stainless steel weld is also presented. Segregations of
S, Nb and P are observed.
| Original language | English |
|---|---|
| Place of Publication | Espoo |
| Publisher | VTT Technical Research Centre of Finland |
| Number of pages | 25 |
| ISBN (Print) | 951-38-1315-0 |
| Publication status | Published - 1981 |
| MoE publication type | D4 Published development or research report or study |
Publication series
| Series | Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports |
|---|---|
| Number | 32 |
| ISSN | 0358-5077 |
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Keywords
- austenitic stainless steels
- grain boundaries
- segregation
- sensitizing
- hot cracking
- intergranular corrosion
Cite this
Hänninen, H., & Minni, E. (1981). Grain boundary segregation in austenitic stainless steels. VTT Technical Research Centre of Finland. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, No. 32