Influence of pore characteristics on anisotropic mechanical behavior of laser powder bed fusion–manufactured metal by micromechanical modeling

  • In recent times, additive manufacturing (AM) has proven to be an indispensable technique for processing complex 3D parts because of the versatility and ease of fabrication it offers. However, the generated microstructures show a high degree of complexity due to the complex solidification process of the melt pool. In this study, micromechanical modeling is applied to gain deeper insight into the influence of defects on plasticity and damage of 316L stainless steel specimens produced by a laser powder bed fusion (L-PBF) process. With the statistical data obtained from microstructure characterization, the complex AM microstructures are modeled by a synthetic microstructure generation tool. A damage model in combination with an element deletion technique is implemented into a nonlocal crystal plasticity model to describe anisotropic mechanical behavior, including damage evolution. The element deletion technique is applied to effectively model the growth and coalescence of microstructural pores as described by a damage parameter. Numerical simulations show that the shape of the pores not only affects the yielding and hardening behavior but also influences the porosity evolution itself.

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Author:Mahesh R. G. PrasadORCiDGND, Abhishek BiswasORCiDGND, Karina GeenenGND, Waseem AminORCiDGND, Siwen GaoORCiDGND, Junhe LianORCiDGND, Arne RöttgerORCiDGND, Napat VajraguptaORCiDGND, Alexander HartmaierORCiDGND
Parent Title (English):Advanced engineering materials
Place of publication:Weinheim
Document Type:Article
Date of Publication (online):2024/02/22
Date of first Publication:2020/07/25
Publishing Institution:Ruhr-Universität Bochum, Universitätsbibliothek
Tag:additive manufacturing; crystal plasticity; damage; finite element method; porosityevolution
Issue:12, Artikel 2000641
First Page:2000641-1
Last Page:2000641-14
Dieser Beitrag ist auf Grund des DEAL-Wiley-Vertrages frei zugänglich.
Institutes/Facilities:Interdisciplinary Centre for Advanced Materials Simulation (ICAMS)
Dewey Decimal Classification:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften, Maschinenbau
open_access (DINI-Set):open_access
faculties:Fakultät für Maschinenbau
Licence (English):License LogoCreative Commons - CC BY 4.0 - Attribution 4.0 International