Accurate numerical prediction of thermo-mechanical behaviour and phase fractions in SLM components of advanced high strength steels for automotive applications
Conventional crash absorber in automotive applications, so called crash boxes are fabricated via deep drawn sheet metal resulting in significant lead times and costs. Laser Powder Bed Fusion processes, like Selective Laser Melting (SLM) offer an attractive alternative for the fabrication of crash parts while eliminating any need for costly forming dies and reducing the lead times, provided required material properties are achieved. Reliable numerical simulation model to predict the SLM build process with greater spatial resolution and accuracy is indispensable to understand the process further in order to ensure its applicability to crash structures. In this paper, an improved simulation methodology for SLM process is presented to predict the material behaviour via temperature, deformation, hardening, flow stress and phase fractions throughout the component with increased accuracy and greater resolution. To achieve desired spatial resolution, the equivalent layers are subdivided into individual tracks, which are then deposited sequentially to simulate the printing process. The material is a medium manganese (7-8 %) transformation induced plasticity (TRIP) steel with austenite and martensite primary phases. The multiple solid-state phase transformation cycles undergone by the material are modelled in the simulation and the final phases are predicted. The results indicate improved accuracy and higher resolution in predictions for temperature, phase fractions and deformation.
Copyright (c) 2022 Kiranmayi Abburi Venkata, Rohith Uppaluri, Bernd Schob, Camilo Zopp, Richard Kordass, Jan Bohlen, Matthias Höfemann, Marcin Kasprowicz, Andrzej Pawlak, Edward Chlebus
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors who publish with Technologies for Lightweight Structures (TLS) agree to the following terms:
The corresponding authors confirm with their imprimatur that the article’s publication in Technologies for Lightweight Structures and the copyright terms have been approved by all the other coauthors.
Authors retain copyright and grant Technologies for Lightweight Structures the right of first publication.
If the paper is accepted for publication the content is licenced under a Creative Commons Licence “Attribution 4.0 International (CC BY 4.0)”. This permits use, distribution, and reproduction in any medium, provided the original work is properly cited, and is otherwise in compliance with the licence. Alternative Creative Commons Licences may be assigned in duly justified cases after consultation with the publisher (mail to: firstname.lastname@example.org).
Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., publish it in a book), with an acknowledgement of its initial publication in Technologies for Lightweight Structures.
Authors are permitted and encouraged to post the peer-reviewed, pre-copyedited version (post-print) of their articles online (e.g., in institutional repositories or on their website) prior to and during the submission process as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access). If authors wish to republish an article, they are kindly asked to include the following acknowledgment as well as a link to the original source of publication in Technologies for Lightweight Structures to secure consistent citations:
This is a peer-reviewed, pre-copyedited version of an article accepted for publication in the open access journal Technologies for Lightweight Structures (TLS). The original publication with full bibliographic citation is available online at: xxx [insert DOI received upon publication].
For further questions, feel free to contact us via e-mail.