Details
| Original language | English |
|---|---|
| Pages (from-to) | 1-9 |
| Number of pages | 9 |
| Journal | Journal of Materials Processing Technology |
| Volume | 264 |
| Early online date | 29 Aug 2018 |
| Publication status | Published - Feb 2019 |
Abstract
Specimens of austenitic AISI 304 and ferritic 446 (contains 1.7 wt.% Al) underwent heat treatments up to 1200 °C in ultrahigh vacuum (UHV) in an analysis chamber with a base pressure of 10-10 mbar and high vacuum (HV) in an industrial vacuum brazing furnace with a base pressure of 10-6 mbar. The effect of the two oxygen partial pressure ranges on surface and bulk composition was determined by XPS, AES and EDX, imaging was provided by SEM. For AISI 304, we observe similar behavior for both atmospheres and the removal of the surface oxide layer. For AISI 446, we observe a strong dependency on the atmosphere. Heat treatment in high vacuum yielded a thick aluminum oxide layer on the surface that inhibited wetting with copper silver eutectic. Heat treatments in ultrahigh vacuum did not lead to aluminum oxide formation but rather carbide formation of foreign elements such as titanium was observed on the surface.
Keywords
- Stainless steel, Surface deoxidation, UHV, Vacuum brazing, Wetting
ASJC Scopus subject areas
- Materials Science(all)
- Ceramics and Composites
- Computer Science(all)
- Computer Science Applications
- Materials Science(all)
- Metals and Alloys
- Engineering(all)
- Industrial and Manufacturing Engineering
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In: Journal of Materials Processing Technology, Vol. 264, 02.2019, p. 1-9.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Influence of atmosphere during vacuum heat treatment of stainless steels AISI 304 and 446
AU - Strauß, Cornelia
AU - Gustus, René
AU - Maus-Friedrichs, Wolfgang
AU - Schöler, Simon
AU - Holländer, Ulrich
AU - Möhwald, Kai
N1 - Funding information: We thank Wanja Dziony for SAM measurements and the Deutsche Forschungsgesellschaft (DFG) for financial support [award numbers MA 1893/24-1 and MO 881/22-1 ].
PY - 2019/2
Y1 - 2019/2
N2 - Specimens of austenitic AISI 304 and ferritic 446 (contains 1.7 wt.% Al) underwent heat treatments up to 1200 °C in ultrahigh vacuum (UHV) in an analysis chamber with a base pressure of 10-10 mbar and high vacuum (HV) in an industrial vacuum brazing furnace with a base pressure of 10-6 mbar. The effect of the two oxygen partial pressure ranges on surface and bulk composition was determined by XPS, AES and EDX, imaging was provided by SEM. For AISI 304, we observe similar behavior for both atmospheres and the removal of the surface oxide layer. For AISI 446, we observe a strong dependency on the atmosphere. Heat treatment in high vacuum yielded a thick aluminum oxide layer on the surface that inhibited wetting with copper silver eutectic. Heat treatments in ultrahigh vacuum did not lead to aluminum oxide formation but rather carbide formation of foreign elements such as titanium was observed on the surface.
AB - Specimens of austenitic AISI 304 and ferritic 446 (contains 1.7 wt.% Al) underwent heat treatments up to 1200 °C in ultrahigh vacuum (UHV) in an analysis chamber with a base pressure of 10-10 mbar and high vacuum (HV) in an industrial vacuum brazing furnace with a base pressure of 10-6 mbar. The effect of the two oxygen partial pressure ranges on surface and bulk composition was determined by XPS, AES and EDX, imaging was provided by SEM. For AISI 304, we observe similar behavior for both atmospheres and the removal of the surface oxide layer. For AISI 446, we observe a strong dependency on the atmosphere. Heat treatment in high vacuum yielded a thick aluminum oxide layer on the surface that inhibited wetting with copper silver eutectic. Heat treatments in ultrahigh vacuum did not lead to aluminum oxide formation but rather carbide formation of foreign elements such as titanium was observed on the surface.
KW - Stainless steel
KW - Surface deoxidation
KW - UHV
KW - Vacuum brazing
KW - Wetting
UR - http://www.scopus.com/inward/record.url?scp=85052628831&partnerID=8YFLogxK
U2 - 10.1016/j.jmatprotec.2018.08.038
DO - 10.1016/j.jmatprotec.2018.08.038
M3 - Article
AN - SCOPUS:85052628831
VL - 264
SP - 1
EP - 9
JO - Journal of Materials Processing Technology
JF - Journal of Materials Processing Technology
SN - 0924-0136
ER -