|About this Abstract
||MS&T22: Materials Science & Technology
||Additive Manufacturing Modeling, Simulation, and Machine Learning: Microstructure, Mechanics, and Process
||Residual Stress Modeling during Wire Arc Additive Manufacturing of Low Temperature Transformation Alloy
||Guru Charan Reddy Madireddy, Yousub Lee, Kyle Saleeby, Wei Tang, Thomas Feldhausen, Alex Plotkowski
|On-Site Speaker (Planned)
||Guru Charan Reddy Madireddy
Under dynamic printing conditions and complex geometries in wire-arc additive manufacturing, varying thermal cycles and internal stress buildup causes unfavorable part deformation. Residual stress mitigation strategies have been mainly developed to reduce inhomogeneity in heat distribution and cooling rate. In this work, a part was printed on a wire-arc based additive system (Tormach) using low temperature transformation (LTT) alloy, which induces compressive stress through martensite phase transformation. The phase transformation induced stress is predicted using finite element method (FEM) integrated with phase transformation models, Weibull cumulative distribution function and Koistien-Marbuger. The temperature profile was validated against in-situ infrared camera and thermocouple data. Significant stress reduction was observed in the model due to the martensite transformation. The phase transformation and residual stresses from FE model will be validated.