Journal ArticleDOI
Transient thermal modeling of laser-based additive manufacturing for 3D freeform structures
TLDR
In this paper, a new approach to 3D transient thermal analysis for additive manufacturing for 3D complex industrial structures with freeform features in powder bed systems using laser heat source is introduced.Abstract:
Additive layer manufacturing is growing very fast in various industries such as biomedical, aircraft, and aerospace industries. There is a need for developing simulation tools for predicting transient temperature fields in additive layer manufacturing of three-dimensional (3D) complex parts in these industries. Transient temperature fields in additive manufacturing are critical due to the fact that transient temperatures directly affect residual stresses, microstructure, fatigue life, 3D distortions, and deformations of produced parts. Considering this industrial need, this article introduces a new approach to 3D transient thermal analysis for additive manufacturing for 3D complex industrial structures with freeform features in powder bed systems using laser heat source. Incorporating the features of phase changes, porous media, and temperature-dependent thermal material properties in COMSOL Multiphysics, the developed technique is able to simulate instantaneous transient temperature fields in additive layer manufacturing of 3D complex and freeform structures. Temperature model validations are performed on titanium alloy with the experimental temperature measurements available in the literature. It is observed that the predicted model simulation results agree well with the experimental measurements.read more
Citations
More filters
Journal ArticleDOI
Mechanistic models for additive manufacturing of metallic components
TL;DR: In this article, the authors focus on the available mechanistic models of additive manufacturing (AM) that have been adequately validated and evaluate the functionality of AM models in understanding of the printability of commonly used AM alloys and the fabrication of functionally graded alloys.
Journal ArticleDOI
Review on thermal analysis in laser-based additive manufacturing
Zhaorui Yan,Weiwei Liu,Zijue Tang,Xuyang Liu,Nan Zhang,Mingzheng Li,Mingzheng Li,Hong-Chao Zhang,Hong-Chao Zhang +8 more
TL;DR: In this paper, the relationship between thermal behavior and product quality is identified and some recommendations for future research are discussed. But, the quality and repeatability of the components and parts produced by LAM have hindered the spread of this technique.
Journal ArticleDOI
Data-driven multi-scale multi-physics models to derive process---structure---property relationships for additive manufacturing
Wentao Yan,Stephen Lin,Orion L. Kafka,Yanping Lian,Cheng Yu,Zeliang Liu,Jinhui Yan,Sarah Wolff,Hao Wu,Ebot Ndip-Agbor,Mojtaba Mozaffar,Kornel F. Ehmann,Jian Cao,Gregory J. Wagner,Wing Kam Liu +14 more
TL;DR: In this article, the authors propose data-mining as an effective solution to understand the underlying physical mechanisms of additive manufacturing (AM) processes and material compositions, structures and properties in end-use products with arbitrary shapes.
Journal ArticleDOI
Overhanging Features and the SLM/DMLS Residual Stresses Problem: Review and Future Research Need
TL;DR: In this article, the authors present a survey of the literature on overhang feature design in additive manufacturing processes, focusing on process modeling (general, heat transfer, stress and distortion and material models), direct process control (input and environmental control, hardware-in-the-loop monitoring, parameter optimization and post-processing), experiment development (methods for evaluation, optical and mechanical process monitoring, imaging and design-of-experiments), support structure optimization and overhang features design; approximately 143 published works were examined.
Journal ArticleDOI
In-situ high-speed X-ray imaging of piezo-driven directed energy deposition additive manufacturing.
TL;DR: In-situ high-speed X-ray imaging of the powder-blown additive manufacturing process of Ti-6Al-4V powder particles is the first of its kind and reveals how laser-matter interaction influences powder flow and porosity formation.
References
More filters
Book
Numerical heat transfer and fluid flow
TL;DR: In this article, the authors focus on heat and mass transfer, fluid flow, chemical reaction, and other related processes that occur in engineering equipment, the natural environment, and living organisms.
Journal ArticleDOI
A three-dimensional finite element analysis of the temperature field during laser melting of metal powders in additive layer manufacturing
TL;DR: In this paper, the authors used an innovative simulation technique known as element birth and death, in modelling the three-dimensional temperature field in multiple layers in a powder bed, which indicated that the heated regions undergo rapid thermal cycles that could be associated with commensurate thermal stress cycles.
Journal ArticleDOI
Finite element simulation of the temperature and stress fields in single layers built without-support in selective laser melting
TL;DR: In this article, a nonlinear transient model based on sequentially coupled thermo-mechanical field analysis code was developed in ANSYS parametric design language (APDL) to investigate the temperature and stress fields in single 316L stainless steel layers built on the powder bed without support in SLM.