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Effect of Cd on Mechanical Properties of Al-Si-Cu-Mg Alloys under Different Multi-Stage Solution Heat Treatment
| Content Provider | MDPI |
|---|---|
| Author | Mao, Hongkui Bai, Xiaoyu Song, Feng Song, Yuewen Jia, Zhe Xu, Hong Wang, Yu |
| Copyright Year | 2022 |
| Description | Multi-stage heat treatment is an important method to improve the mechanical properties of Al-Si-Cu-Mg aluminum alloys. In this paper, the multi-stage heat treatment was carried out for the Cd-free and Cd-containing alloys. The experimental results show that the addition of Cd promoted the precipitation of Q″ and θ″, which led to the formation of a large number of fine, dispersed precipitates and a higher yield strength (YS) and ultimate tensile strength (UTS) for the Cd-containing alloys. The addition of Cd also altered the optimal heat treatment parameters. For the Cd-free alloys, the Cu-rich phase fully dissolved after three-stage heat treatment, and the YS and UTS of the three-stage heat-treated alloys were higher than their two-stage heat-treated counterparts. For the Cd-containing alloys, the three-stage heat treatment led to the precipitation of Cd-rich low melting point phases, caused defects, and reduced the mechanical properties of the alloy. The size and volume fractions of the precipitates were significantly less than those of the alloys after two-stage heat treatment and the strength of the alloys decreased. Therefore, the solution time should be strictly controlled for Cd-containing Al-Si-Cu-Mg alloys. |
| Starting Page | 5101 |
| e-ISSN | 19961944 |
| DOI | 10.3390/ma15155101 |
| Journal | Materials |
| Issue Number | 15 |
| Volume Number | 15 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-07-22 |
| Access Restriction | Open |
| Subject Keyword | Materials Manufacturing Engineering Al-si-cu-mg Cast Alloys Multi-stage Heat Treatment Precipitation |
| Content Type | Text |
| Resource Type | Article |
