Abstract
The isotherms of the Ir-Ni-Al in the composition range up to 50 at% Al are presented at 1573 K. The phase constitution and microstructure of the Ir-Ni-Al alloys were examined using X-ray diffractometry (XRD), scanning electron microscopy (SEM) with an electron probe microanalyzer (EPMA), and transmission electron microscopy (TEM) after heat treatment at 1573 K for 168 h. The B2-NiAl and B2-IrAl phases connected with each other at 1573 K. The highest solubility limit of Ir into Ni3Al was about 3.5 at% in the tested alloys. Then, a wide fcc + B2 and a narrow fcc + L12 and B2 + L12 two-phase region appeared in the isothermal section. In part of the B2 phase, a martensitic transformation from the B2 to the L10 phase was observed.
| Original language | English |
|---|---|
| Pages (from-to) | 479-488 |
| Number of pages | 10 |
| Journal | Intermetallics |
| Volume | 15 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2007 Apr 1 |
| Externally published | Yes |
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Keywords
- A. Nickel aluminides, based on NiAl
- A. Nickel aluminides, based on NiAl
- B. Phase diagrams
- D. Martensitic structure
- D. Microstructure
ASJC Scopus subject areas
- Chemistry(all)
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry
Cite this
Phase equilibria between the B2, L12, and fcc phases in the Ir-Ni-Al system. / Yamabe-Mitarai, Y.; Aoyagi, T.; Nishida, K.; Aoki, H.; Abe, T.; Murakami, Hideyuki.
In: Intermetallics, Vol. 15, No. 4, 01.04.2007, p. 479-488.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Phase equilibria between the B2, L12, and fcc phases in the Ir-Ni-Al system
AU - Yamabe-Mitarai, Y.
AU - Aoyagi, T.
AU - Nishida, K.
AU - Aoki, H.
AU - Abe, T.
AU - Murakami, Hideyuki
PY - 2007/4/1
Y1 - 2007/4/1
N2 - The isotherms of the Ir-Ni-Al in the composition range up to 50 at% Al are presented at 1573 K. The phase constitution and microstructure of the Ir-Ni-Al alloys were examined using X-ray diffractometry (XRD), scanning electron microscopy (SEM) with an electron probe microanalyzer (EPMA), and transmission electron microscopy (TEM) after heat treatment at 1573 K for 168 h. The B2-NiAl and B2-IrAl phases connected with each other at 1573 K. The highest solubility limit of Ir into Ni3Al was about 3.5 at% in the tested alloys. Then, a wide fcc + B2 and a narrow fcc + L12 and B2 + L12 two-phase region appeared in the isothermal section. In part of the B2 phase, a martensitic transformation from the B2 to the L10 phase was observed.
AB - The isotherms of the Ir-Ni-Al in the composition range up to 50 at% Al are presented at 1573 K. The phase constitution and microstructure of the Ir-Ni-Al alloys were examined using X-ray diffractometry (XRD), scanning electron microscopy (SEM) with an electron probe microanalyzer (EPMA), and transmission electron microscopy (TEM) after heat treatment at 1573 K for 168 h. The B2-NiAl and B2-IrAl phases connected with each other at 1573 K. The highest solubility limit of Ir into Ni3Al was about 3.5 at% in the tested alloys. Then, a wide fcc + B2 and a narrow fcc + L12 and B2 + L12 two-phase region appeared in the isothermal section. In part of the B2 phase, a martensitic transformation from the B2 to the L10 phase was observed.
KW - A. Nickel aluminides, based on NiAl
KW - A. Nickel aluminides, based on NiAl
KW - B. Phase diagrams
KW - D. Martensitic structure
KW - D. Microstructure
UR - http://www.scopus.com/inward/record.url?scp=33947139201&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33947139201&partnerID=8YFLogxK
U2 - 10.1016/j.intermet.2006.08.015
DO - 10.1016/j.intermet.2006.08.015
M3 - Article
AN - SCOPUS:33947139201
VL - 15
SP - 479
EP - 488
JO - Intermetallics
JF - Intermetallics
SN - 0966-9795
IS - 4
ER -