About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture
|
| Presentation Title |
Factors Controlling Residual Stress Formation in Laser Powder Bed Fusion Fabricated AlSi10Mg and Ti6Al4V |
| Author(s) |
Jamie J. Kruzic, M. Rais A. Taufiq, Bernd Gludovatz, Xiaopeng Li |
| On-Site Speaker (Planned) |
Jamie J. Kruzic |
| Abstract Scope |
Residual stresses in laser powder bed fusion (LPBF) components can cause part distortion and reduced fatigue resistance; however, residual stress levels are difficult to anticipate based on the LPBF process parameters. This study uses the bridge curvature sample technique to understand how LPBF process parameters control the residual stress magnitudes in AlSi10Mg and Ti6Al4V alloys based on the sample flatness deviation (FLTt). For AlSi10Mg, the residual stresses were significantly influenced by changes in the LPBF process parameters, and a strong positive correlation was found between the solidification cooling rates and the FLTt values. In contrast, while FLTt values were higher for Ti6Al4V compared to AlSi10Mg, only build plate preheating showed a significant effect on the residual stresses. Differences in the alloy behavior are attributed to the metallurgical differences between AlSi10Mg and Ti6Al4V. Finally, the influence of LPBF induced residual stresses on fatigue crack growth behavior is reported. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Mechanical Properties |