| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Towards Rapid Qualification
|
| Presentation Title |
Localized Residual Stress Measurements via Energy-based Nanoindentation in Titanium Alloys Processed with Laser Powder Bed Fusion |
| Author(s) |
Jia-Huei Tien, David Brice, David Bahr |
| On-Site Speaker (Planned) |
Jia-Huei Tien |
| Abstract Scope |
Metal additive manufacturing can produce intricate components, but the complicated thermal history can result in substantial residual stresses. We present a method for analyzing localized residual stress in powder bed fusion titanium alloys. Experimental evaluation of localized residual stresses was conducted using the energy envelope from nanoindentation load-displacement curve, which describes the total work of the indents. Residual stress calculations were performed by comparing the printed materials to annealed materials with same composition and processing method. This experiment provides uniaxial residual stress profile and mechanical properties along the building direction of two Ti alloys, ATI-Titan 23TM and Ti-64. Tensile stresses can reach up to 0.5GPa at the free surface and building support, balanced by a compressive stress of -0.5GPa at center along the printing direction within a 2.5cm coupon. Differences in the hardness of the alloys and their heat treatment response will be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Additive Manufacturing, Mechanical Properties |