About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
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Presentation Title |
High Cycle Fatigue of a Novel Additively Manufactured Al-Ni-Ti-Zr Alloy with a Heterogeneous Microstructure |
Author(s) |
Ravi Sankar Haridas, Saket Thapliyal, Priyanka Agrawal, Priyanshi Agrawal, Rajiv S. Mishra |
On-Site Speaker (Planned) |
Ravi Sankar Haridas |
Abstract Scope |
Alloy design strategies in additive manufacturing (AM) to achieve grain refinement and terminal eutectic solidification enabled expansion of AM processing window to obtain crack-free builds with microstructural hierarchy and heterogeneity. In this study, high cycle fatigue (HCF) behavior of a novel Al-Ni-Ti-Zr alloy with a heterogeneous microstructure was studied in the as-built condition, supplemented by detailed microstructural and mechanical characterization. The alloy showed excellent HCF performance with a fatigue endurance limit to ultimate tensile strength ratio of 0.29. The study revealed the existence of multiple crack retardation mechanisms and favorable crack propagation pathways through the fine-grained regions which enabled good fatigue performance to the alloy. Further, a probabilistic model has been used to estimate the fatigue life of the alloy as a function of the stochastic microstructure by utilizing the statistical distribution of pores, solid-state inclusions, and grains in the AM Al alloy. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Aluminum, Other |