Loading...
Please wait, while we are loading the content...
Similar Documents
Effect of Transition Metal Elements on High-Temperature Properties of Al–Si–Cu–Mg Alloys
| Content Provider | MDPI |
|---|---|
| Author | Gao, Chao Zhang, Lingkun Zhang, Bingrong |
| Copyright Year | 2021 |
| Description | In the present work, we studied the effects of transition metal elements on microstructure evolution and high-temperature mechanical properties via the preparation of new modified alloys with micro-additions of Cr, Ti, V, Zr, Mo, and Mn to address the poor high-temperature performance of Al–Si–Cu–Mg alloys for automotive engines. The results show that the addition of transition metal elements formed a variety of new intermetallic phases that were stable at high temperatures, such as (AlSi)3(TiVZr), (AlSi)3Ti, (AlSi)3(CrVTi), Al74Si6Mn4Cr2Fe, Al85Si5Mn2Mo2CrFe, Al0.78Fe4.8Mn0.27Mo4.15Si2, (AlSi)2(CrVTi)Mo, and Al13(MoCrVTi)4Si4, and these phases evidently improved the ultimate high-temperature tensile strength and yield strength. The ultimate tensile strength and yield strength of the modified alloy increased by 17.49% and 31.65% when the test temperature increased to 240 °C, respectively, and by 71.28% and 74.73% when the test temperature increased to 300 °C, respectively. The fundamental reason for this change is that the intermetallic phase hinders the expansion of cracks, which can exist stably at high temperatures. When a crack extends to the intermetallic phases, it will break along with the intermetallic phases or propagate along the morphological edge of the intermetallic phases. |
| Starting Page | 357 |
| e-ISSN | 20754701 |
| DOI | 10.3390/met11020357 |
| Journal | Metals |
| Issue Number | 2 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-02-20 |
| Access Restriction | Open |
| Subject Keyword | Metals Manufacturing Engineering Al–si–cu–mg Alloys Transition Metal Elements Ultimate Tensile Strength Yield Strength High-temperature Properties |
| Content Type | Text |
| Resource Type | Article |
