| HAN Bao-jun,HE Qiong,YANG Miao.Effects of Surface Mechanical Attrition Treatment Technique on Microstructure of AZ91D Magnesium Alloys[J],44(2):78-82 |
| Effects of Surface Mechanical Attrition Treatment Technique on Microstructure of AZ91D Magnesium Alloys |
| Received:August 07, 2014 Revised:February 20, 2015 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2015.02.015 |
| KeyWord:AZ91D magnesium alloys surface mechanical attrition treatment grain refinement |
| Author | Institution |
| HAN Bao-jun |
1. School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou , China;2. Jiangxi Provincial Engineering Research Center for Magnesium Alloys, Gannan Normal University, Ganzhou , China |
| HE Qiong |
1. School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou , China;2. Jiangxi Provincial Engineering Research Center for Magnesium Alloys, Gannan Normal University, Ganzhou , China |
| YANG Miao |
1. School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou , China;2. Jiangxi Provincial Engineering Research Center for Magnesium Alloys, Gannan Normal University, Ganzhou , China |
|
| Hits: |
| Download times: |
| Abstract: |
| Objective To investigate the influence of surface mechanical attrition treatment technique on the grain refinement behavior and mechanism of AZ91D magnesium alloys. Methods The AZ91D magnesium alloy in hexagonal-closet-packet structure was treated by surface mechanical attrition treatment (SMAT) with different ball diameters and handling time, and the microstructure of surface deformed layer was characterized and compared. Results The grain of AZ91D magnesium alloys was obviously refined by surface mechanical attrition treatment. In a certain range, as the balls diameter or handling time increased, the grain size became smaller, and could finally reach about 24 nm. Conclusion The grain refinement mechanism of AZ91D magnesium alloy by surface mechanical attrition treatment was the results of twinning and dislocation slip. When the diameter of balls was 16 mm and the handling time was 180 min, surface mechanical attrition treatment has the highest efficiency. |
| Close |
|
|
|