|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location-Specific Processing-Microstructure-Property Relationships
||Numerical and Experimental Investigation of Residual Stress Evolution in Additively Manufactured 17-4 PH Stainless Steel by Selective Laser Melting
||Md Shamsujjoha, Sean R. Agnew, James M. Fitz-Gerald
|On-Site Speaker (Planned)
A fundamental understanding of the correlation between processing variables and mechanical deformation is essential to control the residual stress develop during selective laser melting (SLM) of 17-4 PH steel due to cyclic heating, cooling, and solid-state phase transformation. A finite element model which accounts for heat transfer, phase transformation kinetics, and elastic-plastic deformation was developed using ABAQUS. The temperature distribution in the deposited part was predicted by modeling the interaction between a moving laser heat source and the powder bed. Metallurgical transformations are taken into account using the latent heats of transformation and temperature-dependent material properties. The model works in a decoupled fashion, where the temperature field results are used in a subsequent mechanical analysis to predict the residual stresses. X-ray diffraction phase fraction and residual stress measurement was performed to validate the model. The effect of post-SLM heat treatment on the internal stresses was also investigated.
||Planned: Supplemental Proceedings volume