Abstract
Present paper describes the effects of the Mg content on the occurrence of HDDR phenomena as well as the microstructural evolution in Al-(3-7.8mass%)Mg alloys. It was found that the HDDR phenomena take place in all those alloys, and grain size of the alloy turned into a several 10 run after HDDR treatments such as heat-treatment at 350°C under hydrogen pressure of 7.5 MPa for 72 h, in following by the hydrogen desorption treatment at 350°C for 4 h in vacuum. The refined grain size of Al-3.0mass% Mg alloy was observed to be largest among there alloys. However, it should be emphasized that small content of Mg (3 mass%) is able to induce the HDDR phenomena associated with the nano-order grain refinements in Al-Mg alloys. This could be the first observation of HDDR phenomena which occur in Al-3 and 5mass%Mg alloys, and are effective for yielding the nano-order fine grain size.
| Original language | English |
|---|---|
| Pages (from-to) | 874-878 |
| Number of pages | 5 |
| Journal | Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy |
| Volume | 52 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 2005 Dec |
Keywords
- Al-Mg alloy
- Grain size refinement
- HDDR
- Hydrogen-treatment
- Hydrogenation disproportionation desorption recombination phenomena
ASJC Scopus subject areas
- Mechanical Engineering
- Industrial and Manufacturing Engineering
- Metals and Alloys
- Materials Chemistry