抄録
Precipitation of nanometer-sized fct θ-NiMn intermetallic compound was found to cause age hardening in Fe-10Ni-7Mn (wt%) maraging alloy during isothermal aging at 753 K. High resolution transmission electron microscopy was used to study the substructure of the fct θ-NiMn precipitates in the alloy after aging for 0.36 and 86.4 ks. Nano-scale twins on (111) planes were found in the precipitates of intial and later stages of aging. Precipitation of bcc θ-NiMn at 753 K and subsequent martensitic transformation to fct β-NiMn during cooling to room temperature was suggested. It was also indicated that precipitation of fct θ-NiMn at bcc iron matrix gives rise to high coherency strain energy. The (111) twinning is proposed to accommodate the strain energy of either martensitic transformation or coherency strain of precipitation reaction.
| 本文言語 | English |
|---|---|
| ページ（範囲） | 2229-2235 |
| ページ数 | 7 |
| ジャーナル | Physica Status Solidi (A) Applications and Materials Science |
| 巻 | 203 |
| 号 | 9 |
| DOI | |
| 出版ステータス | Published - 2006 7月 1 |
ASJC Scopus subject areas
- 電子材料、光学材料、および磁性材料
- 凝縮系物理学
- 表面および界面
- 表面、皮膜および薄膜
- 電子工学および電気工学
- 材料化学