Additive manufacturing failure mechanisms due to build defects?
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Additive manufacturing failure mechanisms due to build defects include porosities, incomplete fusion, hot cracking, delamination, lack of fusion, keyhole collapse, gas porosity, solidification cracking, solid-state cracking, surface-connected porosity, sintering porosity, and improper binder burnout . These defects act as stress raisers and can deteriorate the mechanical properties of the alloy . The presence of external defects such as pores and unmelted particles can lead to premature failure by acting as sites for crack initiation . The failure behavior of additive manufactured materials is influenced by factors such as stress states, strain rates, and the presence of initial defects . High laser power and overlap ratio can improve the failure behavior by reducing the number of initial defects . Residual stresses and warpage caused by the recoater can also contribute to build failure in additive manufacturing . Mitigation strategies for these failure mechanisms include postprocess machining, surface treatment, and postprocessing HIP .
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| Papers (4) | Insight |
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| The paper discusses the role of initial defects in the failure behavior of laser metal deposited additive manufacturing Ti-6Al-4V (LMD Ti64) alloy. It states that high laser power and overlap ratio can improve the failure behavior by reducing the number of initial defects. | |
72 Citations | The paper discusses the premature failure of additively manufactured materials due to external defects such as pores and unmelted particles that act as sites for crack initiation. |
3 Citations | The paper discusses the defect-based fatigue performance of selective laser melted Ti6Al4V alloy, but it does not specifically mention the failure mechanisms due to build defects in additive manufacturing. |
60 Citations | The paper discusses the formation of defects in metal additive manufacturing processes, including lack of fusion, porosity, and cracking. It also mentions defect-mitigation strategies but does not specifically address failure mechanisms due to build defects. |
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