| dc.creator |
Smialek, James L. |
|
| dc.creator |
Gray, Simon |
|
| dc.date |
2018-10-26T14:23:46Z |
|
| dc.date |
2018-10-26T14:23:46Z |
|
| dc.date |
2018-10-25 |
|
| dc.date.accessioned |
2022-05-25T16:39:22Z |
|
| dc.date.available |
2022-05-25T16:39:22Z |
|
| dc.identifier |
James L. Smialek and Simon Gray. Low temperature hot corrosion screening of single crystal superalloys. Materials, 2018, Volume 11, Issue 11, Article number 2098 |
|
| dc.identifier |
1996-1944 |
|
| dc.identifier |
https://doi.org/10.3390/ma11112098 |
|
| dc.identifier |
http://dspace.lib.cranfield.ac.uk/handle/1826/13584 |
|
| dc.identifier.uri |
http://localhost:8080/xmlui/handle/CUHPOERS/182439 |
|
| dc.description |
Single crystal superalloys were screened in Type II molten (Na,K)-sulfate hot corrosion re-coat tests in air +300 ppm SO2 at 700 °C. They exhibited large 20–40 mg/cm2 weight changes, repeated spallation, and non-protective, 25–50 μm thick corrosion layers after 300 h of testing. Scale cross sections revealed dual outer Ni(Co)O and inner Al(Cr)S-rich corrosion layers. This chemical differentiation was partially consistent with previous models of oxide fluxing, alloy sulfidation, NiO micro-channel diffusion, and synergistic dissolution mechanisms. Broad shallow pits or uniform attack morphologies were consistent with prior studies performed in high >100 ppm pSO2 environments. Higher Mo experimental alloys trended toward more degradation, producing 100 μm thick scales with distinct Al(Cr)S-rich inner layers or 500 μm thick NiO. The aggressive behavior in these environments supports the need for LTHC-resistant coatings for single crystal superalloys. |
|
| dc.language |
en |
|
| dc.publisher |
MDPI |
|
| dc.rights |
Attribution 4.0 International |
|
| dc.rights |
http://creativecommons.org/licenses/by/4.0/ |
|
| dc.subject |
Type II hot corrosion |
|
| dc.subject |
single crystal superalloys |
|
| dc.subject |
molten salt |
|
| dc.title |
Low temperature hot corrosion screening of single crystal superalloys |
|
| dc.type |
Article |
|