Abstract
STEM-EDX analysis has been carried out to study segregation in the SiCw/6061 Al composite, and Mg was found to be segregated at reinforcement-matrix interfaces. It is shown that the segregation of Mg to the interface is consistent with the hypothesis of non-equilibrium segregation based on the vacancy-drag mechanism. A method is described of thermally treating the MMC to improve and tailor its precipitation structure according to these informations. The method comprises subjecting the MMC for a short period of time above a solvus temperature of the GP (II) zone or β′ transition phase, and a subsequent aging treatment. Partial dissolution of the GP zone or the transition phase is caused by dependence of the solvus temperatures on the solute concentration, and produces a more homogeneous distribution of the precipitates after the re-aging treatment. The beneficial effects on the mechanical properties of the MMC became clear, and its mechanism has been investigated.
| Original language | English |
|---|---|
| Pages (from-to) | 1086-1094 |
| Number of pages | 9 |
| Journal | Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals |
| Volume | 58 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 1994 |
| Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanics of Materials
- Metals and Alloys
- Materials Chemistry