| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
A-134: On the Role of Defects in the Dynamic Response of AM SLM 316L |
| Author(s) |
Liam C. Smith, David J. Chapman, Paul Hooper, Daniel E. Eakins |
| On-Site Speaker (Planned) |
Liam C. Smith |
| Abstract Scope |
AM materials have differing texture to CM counterparts, with AM material also suffering from defects including cracking, lack-of-fusion porosity and element segregation. Understanding the effects of these on dynamic material response is key to adopting these materials into real-world applications.
Several highly instrumented reverse (anvil-on-rod) Taylor tests were conducted to evaluate the constitutive response of AM and CM 316L steel. These tests produce a wide range of stresses, strains and strain-rates, allowing strong validation of constitutive models. Potential anisotropic behaviour was explored by comparing the behaviour of AM cylindrical samples manufactured parallel and perpendicular to the build direction.
Experimental data from multiple tests were incorporated into an LS-DYNA optimisation routine, which sought to match experimentally measured material responses by varying material parameters in two established constitutive models (JC/ZA). Disparities in optimised material parameters offer comparisons of dynamic response between materials and demonstrate the importance of understanding AM microstructural characteristics. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |