Abstract
This report presents an overview of recent studies demonstrating a bulk-state reaction involving mechanical bonding through the application of high-pressure torsion (HPT) processing on two dissimilar engineering metals. This processing approach was developed by revising the sample set-up and applying the simple procedure of alternately stacking two different metal disks using several different metal combinations. Thus, this report describes the development in microstructure after the bulk-state reactions and the mechanical properties of the HPT-induced AlMg, AlCu, AlFe and AlTi alloy systems. A microstructural evaluation confirmed the capability of the HPT procedure for the formation of heterostructures across the disk diameters in these processed alloy systems. Tribology tests and hardness values together with density measurements demonstrated an improved wear resistance and an exceptional specific strength in these alloy systems. The bulk-state reaction by HPT demonstrates a considerable potential for the bonding of dissimilar metals and the fabrication of unique metal systems.
| Original language | English |
|---|---|
| Pages (from-to) | 1131-1138 |
| Number of pages | 8 |
| Journal | Materials Transactions |
| Volume | 60 |
| Issue number | 7 |
| DOIs | |
| State | Published - 2019 |
| Externally published | Yes |
Funding
This study was supported in part by the National Science Foundation of the United States under Grant No. DMR-1810343 (MK & JKH), in part by the National Research Foundation of Korea (NRF) grants funded by the Ministry of Science and ICT, No. 2015R1A5A1037627 and No. 2017R1A2B4012255(JIJ) and in part by the European Research Council under ERC Grant Agreement No. 267464-SPDMETALS (TGL).
Keywords
- Bulk-state reaction
- Diffusion bonding
- High-pressure torsion
- Intermetallic compound
- Severe plastic deformation