Microstructure distribution and orientation-structure topology optimization of metallic materials for laser additive manufacturing

IF 2.7 3区材料科学 Q2 ENGINEERING, MECHANICAL

International Journal of Mechanics and Materials in Design Pub Date : 2022-12-26 DOI:10.1007/s10999-022-09630-9

Qi Zhang, Yali Ma, Yanming Liu, Yongsheng Zhao, Lishan Yan, Xianjiu Chen, Jinhua Ouyang

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引用次数: 0

Abstract

The type and distribution of microstructure of metallic materials in laser additive manufacturing have an important influence on the overall mechanical properties, and how to control the location distribution of microstructure rationally through topology optimization to improve the mechanical properties of the part is one of the research focuses. In this paper, we propose a method of microstructure distribution and orientation-structure topology optimization (MDOSTO) for laser additive manufacturing. This method obtains the position distribution of the microstructure of columnar and equiaxed grains under a macroscopically optimised design. Based on the anisotropy of columnar crystals and the isotropy of equiaxed grains to obtain a microstructure with alternating grains distribution for optimal mechanical properties. The flexibility is compared with the structure of disordered grain distribution by two arithmetic examples (Miniature binding beam and Cantilever Beam), and the flexibility is reduced by 26.3% and 26.6%, respectively, which verifies the feasibility and effectiveness of the method. This method makes full use of the properties of different microstructures to improve the mechanical properties of the part.

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激光增材制造金属材料的微结构分布与取向结构拓扑优化

激光增材制造中金属材料的微结构类型和分布对整体力学性能有重要影响，如何通过拓扑优化合理控制微结构的位置分布，以提高零件的力学性能是研究热点之一。本文提出了一种用于激光增材制造的微结构分布和取向结构拓扑优化(MDOSTO)方法。该方法在宏观优化设计下获得了柱状和等轴晶粒的微观结构位置分布。基于柱状晶的各向异性和等轴晶的各向同性，获得了具有交替晶粒分布的微观组织以获得最佳的力学性能。通过两个算例(微缩束梁和悬臂梁)与无序颗粒分布结构的柔性比较，柔性分别降低了26.3%和26.6%，验证了该方法的可行性和有效性。该方法充分利用了不同组织的性能，提高了零件的力学性能。

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来源期刊

International Journal of Mechanics and Materials in Design ENGINEERING, MECHANICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

6.00

自引率

5.40%

发文量

审稿时长

>12 weeks

期刊介绍： It is the objective of this journal to provide an effective medium for the dissemination of recent advances and original works in mechanics and materials'' engineering and their impact on the design process in an integrated, highly focused and coherent format. The goal is to enable mechanical, aeronautical, civil, automotive, biomedical, chemical and nuclear engineers, researchers and scientists to keep abreast of recent developments and exchange ideas on a number of topics relating to the use of mechanics and materials in design. Analytical synopsis of contents: The following non-exhaustive list is considered to be within the scope of the International Journal of Mechanics and Materials in Design: Intelligent Design: Nano-engineering and Nano-science in Design; Smart Materials and Adaptive Structures in Design; Mechanism(s) Design; Design against Failure; Design for Manufacturing; Design of Ultralight Structures; Design for a Clean Environment; Impact and Crashworthiness; Microelectronic Packaging Systems. Advanced Materials in Design: Newly Engineered Materials; Smart Materials and Adaptive Structures; Micromechanical Modelling of Composites; Damage Characterisation of Advanced/Traditional Materials; Alternative Use of Traditional Materials in Design; Functionally Graded Materials; Failure Analysis: Fatigue and Fracture; Multiscale Modelling Concepts and Methodology; Interfaces, interfacial properties and characterisation. Design Analysis and Optimisation: Shape and Topology Optimisation; Structural Optimisation; Optimisation Algorithms in Design; Nonlinear Mechanics in Design; Novel Numerical Tools in Design; Geometric Modelling and CAD Tools in Design; FEM, BEM and Hybrid Methods; Integrated Computer Aided Design; Computational Failure Analysis; Coupled Thermo-Electro-Mechanical Designs.