The precursor effect of the athermal βaihω transformation in Ti-9.62Fe alloy
✍ Scribed by Quan Zhongxian; Ma Ruzhang; Ping Jueyun; Chang Rugin
- Publisher
- Elsevier Science
- Year
- 1988
- Weight
- 657 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0001-6160
No coin nor oath required. For personal study only.
✦ Synopsis
Ti-9.62Fe alloy was quenched from 1000cC into ice water. The athermal w phase has been observed at room temperature. In the as-quenched alloy the resistivity, Mijssbauer recoil-free fraction. and X-ray diffraction all show anomalous variations with temperature. The anomalous variations existing in a wide range of temperatures below RT are found lo be reversible. The explanation of the anomalous phenomena is based on the instability of the fi phase, which shows the localized soft modes, The instability can be referred to as a precursor effect of o transformation. One of the reasons that the precursor effect can be observed in a wide range of temperatures below RT is due to the slightly higher oxygen concentration, and as a result the oxygen atoms suppress the formation of the o phase, The partially filled 3d-band of this alloy may have some influence on the precursor effect of the (0 transformation.
R&um&L'alliage Ti-9,62 Fe a etb trempt depuis 1000 C dans la glace fondante. et la phase co athermique observke d la temp&ature ambiante.