Effect of Isothermal Treatment on Microstructure and Properties of Mg-3Al-2Ca-2Nd Alloy
The microstructure and mechanical properties of Mg-3Al-2Ca-2Nd alloy as-cast and isothermal treated were studied by using XＲD，OM，SEM，EDS and universal tensile testing machine. The experimental results indicate that the microstructure of Mg-3Al-2Ca-2Nd alloy isothermal treated at 420℃ changes sligh...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Harbin University of Science and Technology Publications
2018-02-01
|
| Series: | Journal of Harbin University of Science and Technology |
| Subjects: | |
| Online Access: | https://hlgxb.hrbust.edu.cn/#/digest?ArticleID=1477 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | The microstructure and mechanical properties of Mg-3Al-2Ca-2Nd alloy as-cast and isothermal
treated were studied by using XＲD，OM，SEM，EDS and universal tensile testing machine. The experimental
results indicate that the microstructure of Mg-3Al-2Ca-2Nd alloy isothermal treated at 420℃ changes slightly
compared to that of as-cast alloy. With the increasing of isothermal treated temperature，the dendritic structure in
as-cast Mg-3Al-2Ca-2Nd alloy disappears，equiaxed grains appear，and the size of grain increases in isothermal
treated Mg-3Al-2Ca-2Nd alloy. The Al11Nd3 phases decompose and the Al2Nd phases with high thermal stability are
produced，and the Al is dissolved into α-Mg in the process of isothermal treatment. The flake Al-Ca phases are
changed into particle phases in the process of isothermal treatment. With the increasing of isothermal treated
temperature，the hardness，tensile strength and elongation of Mg-3Al-2Ca-2Nd alloy increase first and then
decrease，and the maximum value of hardness，tensile strength and elongation of Mg-3Al-2Ca-2Nd alloy treated at
480℃ are 66. 3 HV，144. 5 MPa and 2. 7%，respectively.
|
|---|---|
| ISSN: | 1007-2683 |