Creep behaviour of precipitation-hardened ferritic Fe-19Cr-4Ni-2Al alloy
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Detail(s)
| Original language | English |
|---|---|
| Pages (from-to) | 59-64 |
| Journal / Publication | Materials Letters |
| Volume | 56 |
| Issue number | 1-2 |
| Publication status | Published - Sept 2002 |
Link(s)
Abstract
The creep properties of ferritic Fe-19Cr-4Ni-2Al alloy at 873-973 K under an applied stress range of 70-270 MPa were investigated. The results showed that the alloy exhibits two apparent stress exponents for creep: one in the lower stress regime (n = 2.54) and the other in the higher stress region (n = 11). This was the typical characteristic of precipitation-hardened alloys that exhibit a pronounced transition in the stress vs. creep rate relationship. Moreover, the activation energies for creep (Q) at lower and higher stresses regimes were determined to be 298 and 644 kJ/mol, respectively. Transmission electron microscopy (TEM) examination revealed the precipitation of ordered β′ (NiAl)-type particles during creep deformation at the high stresses regime. © 2002 Elsevier Science B.V. All rights reserved.
Research Area(s)
- Activation energy, Creep rate, Ferritic alloy, Precipitation particle, Stress exponent, TEM
Citation Format(s)
Creep behaviour of precipitation-hardened ferritic Fe-19Cr-4Ni-2Al alloy. / Tjong, S. C.; Ma, Z. Y.
In: Materials Letters, Vol. 56, No. 1-2, 09.2002, p. 59-64.
In: Materials Letters, Vol. 56, No. 1-2, 09.2002, p. 59-64.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
