Phase transformation in an Fe-9.0AI-29.5Mn-1.2Si alloy |
| |
Authors: | T F Liu G C Uen C Y Chao Y L Lin C C Wu |
| |
Affiliation: | (1) Institute of Materials Science and Engineering, National Chiao Tung University, Taiwan, Republic of China;(2) Institute of Mechanical Engineering, National Chiao Tung University, Taiwan, Republic of China |
| |
Abstract: | The microstructure of an (α + γ) duplex Fe-9.0Al-29.5Mn-l.2Si alloy has been investigated by means of transmission electron
microscopy. In the as-quenched condition, extremely fine D03 particles were formed within the ferrite matrix by a continuous ordering transition during quenching. After being aged at
550 °C, the extremely fine D03 particles existing in the as-quenched specimen grew preferentially along (100) directions. With increasing the aging time
at 550 °C, a (Si, Mn)-rich phase (designated as “L phase”) began to appear at the regions contiguous to the D03 particles. The L phase has never been observed in various Fe-Al-Mn, Fe-Al-Si, Fe-Mn-Si, and Mn-Al-Si alloy systems before.
When the as-quenched specimen was aged at temperatures ranging from 550 °C to 950 °C, the phase transformation sequence occurring
within the (α + D03) region as the aging temperature increases was found to be (α + D03 + L phase) → (α + D03 + A13 β-Mn)→ (B2 + D03 + A13 β-Mn)→ (B2 + A13β-Mn)→ (α + A13 β-Mn)→ (α +γ)→α. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|