Abstract
Solid state joining is achieved in three steps, (i) interface asperity deformation, (ii) oxide dispersion, followed by (iii) atomic contact and bonding. Atomically clean metallic surfaces without an oxide layer bond spontaneously. Despite its importance the oxide dispersion mechanism is not well studied. In this work the first ever atom probe study of iron-aluminum solid state welds show that the oxygen concentration at the interface is 20 at.%. This is significantly lower than any equilibrium oxide concentration. We therefore propose that the high-strain rate deformation at the interfaces renders the oxide unstable resulting in the observed concentration of oxygen.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 196-199 |
| Number of pages | 4 |
| Journal | Scripta Materialia |
| Volume | 130 |
| DOIs | |
| State | Published - Mar 15 2017 |
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Keywords
- Atom probe tomography
- Oxide dispersion
- Solid state welding
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
Cite this
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Colossal super saturation of oxygen at the iron-aluminum interfaces fabricated using solid state welding. / Sridharan, N.; Isheim, Dieter; Seidman, David N; Babu, S. S.
In: Scripta Materialia, Vol. 130, 15.03.2017, p. 196-199.Research output: Contribution to journal › Article
TY - JOUR
T1 - Colossal super saturation of oxygen at the iron-aluminum interfaces fabricated using solid state welding
AU - Sridharan, N.
AU - Isheim, Dieter
AU - Seidman, David N
AU - Babu, S. S.
PY - 2017/3/15
Y1 - 2017/3/15
N2 - Solid state joining is achieved in three steps, (i) interface asperity deformation, (ii) oxide dispersion, followed by (iii) atomic contact and bonding. Atomically clean metallic surfaces without an oxide layer bond spontaneously. Despite its importance the oxide dispersion mechanism is not well studied. In this work the first ever atom probe study of iron-aluminum solid state welds show that the oxygen concentration at the interface is 20 at.%. This is significantly lower than any equilibrium oxide concentration. We therefore propose that the high-strain rate deformation at the interfaces renders the oxide unstable resulting in the observed concentration of oxygen.
AB - Solid state joining is achieved in three steps, (i) interface asperity deformation, (ii) oxide dispersion, followed by (iii) atomic contact and bonding. Atomically clean metallic surfaces without an oxide layer bond spontaneously. Despite its importance the oxide dispersion mechanism is not well studied. In this work the first ever atom probe study of iron-aluminum solid state welds show that the oxygen concentration at the interface is 20 at.%. This is significantly lower than any equilibrium oxide concentration. We therefore propose that the high-strain rate deformation at the interfaces renders the oxide unstable resulting in the observed concentration of oxygen.
KW - Atom probe tomography
KW - Oxide dispersion
KW - Solid state welding
UR - http://www.scopus.com/inward/record.url?scp=85005990019&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85005990019&partnerID=8YFLogxK
U2 - 10.1016/j.scriptamat.2016.11.040
DO - 10.1016/j.scriptamat.2016.11.040
M3 - Article
VL - 130
SP - 196
EP - 199
JO - Scripta Materialia
JF - Scripta Materialia
SN - 1359-6462
ER -