| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Emergent Materials under Extremes and Decisive In Situ Characterizations
|
| Presentation Title |
Ultralow Temperature Mechanical Behavior of Additively Manufactured Pure Copper |
| Author(s) |
Young-Kyun Kim, Seong-June Youn, Ka-Ram Lim, Young-Sang Na |
| On-Site Speaker (Planned) |
Young-Kyun Kim |
| Abstract Scope |
In this work, the ultralow temperature mechanical behavior of pure copper additively manufactured by laser powder bed fusion (LPBF) was investigated. The testing temperatures were set to as 298 K, 77 K, and 4.2 K. As-built pure copper shows an epitaxially growth grains with an average grain size of ~81.8 µm. Moreover, a large amount of nano-scale Cu oxide (CuO) was observed at the dislocation-induced substructure boundaries. As the testing temperature decreased to 4.2K, both the yield and tensile strengths increased, accompanied by an enhancement in ductility. Based on the above results, the deformation mechanisms of LPBF pure copper were discussed. |