Abstract
A nanocrystalline layer (NL) was fabricated on the surface of AZ31 magnesium (Mg) alloy sheet by surface mechanical attrition treatment (SMAT). The microstructure of the Mg alloy was characterized by optical microscopy, X-ray diffraction and microhardness test. The results showed that both the microstructure and microhardness of AZ31 Mg alloy sheet after SMAT revealed a gradient distribution along depth from surface to center. The thermal stability of the NL was investigated through characterizing the microstructure evolution during the post-isothermal annealing treatment within the temperature range from 150 to 250 °C. The NL exhibits a certain degree of thermal stability below 150 °C, while it disappears quickly when annealing at the temperature range of 200-250 °C. The grain growth kinetics of the nanocrystalline of AZ31 Mg alloy induced by SMAT was investigated. The activation energy of nanocrystalline AZ31 Mg alloy was obtained with a value of 92.8 kJ/mol.
| Original language | English |
|---|---|
| Pages (from-to) | 1162-1169 |
| Journal | Acta Metallurgica Sinica (English Letters) |
| Volume | 28 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 1 Sept 2015 |
Research Keywords
- Gradient structure
- Magnesium alloy
- Nanocrystalline structure
- Surface mechanical attrition treatment
- Thermal stability
Fingerprint
Dive into the research topics of 'Thermal stability of nanocrystalline AZ31 magnesium alloy fabricated by surface mechanical attrition treatment'. Together they form a unique fingerprint.Cite this
- APA
- Author
- BIBTEX
- Harvard
- Standard
- RIS
- Vancouver