Stress & Distortion During AM

Combined metallurgical and flow-stress models help predict stress and distortion during additive manufacturing of Ti-6Al-4V.

A three-dimensional thermal contour of an additively manufactured deposit, three numbered passes marked along it, on a scale from 900 to 1100 °C.

Written by

Bijish Babu

Published

4 June 2019

Topics

FEM
Manufacturing
MatMod

Read the full article on LinkedIn

Simulating the additive manufacturing process of Ti-6Al-4V is very complex owing to the microstructural changes and allotropic transformation occurring during its thermo-mechanical processing. The α-phase with a hexagonal close pack structure is present in three different forms; Widmanstatten, grain boundary, and Martensite. A metallurgical model that computes the formation and dissolution of each of these phases is used here. Furthermore, a physically based flow-stress model coupled with the metallurgical model is applied in the simulation of an additive manufacturing case using a directed energy deposition method.

The full article can be downloaded from the link below.

Babu, Lundbäck & Lindgren (2019), “Simulation of Ti-6Al-4V Additive Manufacturing Using Coupled Physically Based Flow Stress and Metallurgical Model”, Materials 12(23), 3844 — open access

Originally published by Bijish Babu on LinkedIn: Prediction of Stress & Distortion During Additive Manufacturing of Ti-6Al-4V