About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Special Session
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Presentation Title |
Progress on Residual Stress Measurement (RSM) in Hybrid Additive Manufacturing |
Author(s) |
Gurucharan Madireddy, Mark Wagner, Jordan Michalek, Michael P. Sealy |
On-Site Speaker (Planned) |
Gurucharan Madireddy |
Abstract Scope |
Interlayer surface treatments in additive manufacturing induces complex cumulative residual stresses. Hole drilling is a well-defined method to measure residual stress; however, the standard algorithms do not accurately convert complex heterogeneous strains into stresses. Thus, a new algorithm specific for hybrid additive manufacturing is needed to quantify changes from interlayer surface treatments. In this research, the experimental data required to develop an algorithm was generated by manufacturing coupon samples with various hybrid-AM processes. The coupon samples were manufactured using AlSi10Mg and 316 SS materials on powder bed fusion machine with interlayer surface treatments, such as ultrasonic peening and laser peening. The residual strains in the materials were captured by hole drilling through a strain gage and the stresses were compared to as-printed coupons. It was observed that the changes in the strains are dependent on the raster pattern of the surface treatments. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |