抄録
The ultra-high-temperature deformation behaviors of polycrystalline (PC) and directionally solidified (DS) L12 intermetallic compound Ir3Nb have been investigated. The compression and compressive creep experiments were performed at temperatures from 1650 to 1800 °C at initial applied stresses from 49 to 200 MPa. The results show that the DS alloy has higher creep resistance and longer creep life than the PC alloy under above experimental conditions. The steady-state creep behavior of the DS alloy can be described in terms of power-law creep with the apparent stress exponent of 2.3 and activation energy of 295 kJ/mol. The creep mechanism is discussed in the light of the creep microstructure.
本文言語 | English |
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ページ(範囲) | 57-62 |
ページ数 | 6 |
ジャーナル | Intermetallics |
巻 | 11 |
号 | 1 |
DOI | |
出版ステータス | Published - 2003 1月 1 |
外部発表 | はい |
ASJC Scopus subject areas
- 化学 (全般)
- 材料力学
- 機械工学
- 金属および合金
- 材料化学