Topology-optimized lattice structures with simultaneously high stiffness and light weight fabricated by selective laser melting: Design, manufacturing and characterization

Zhang, Lei; Song, Bo; Fu, Junjie; Wei, Shuaishuai; Liu, Yang; Yan, Chunze; Li, H.; Gao, Liang; Shi, Yusheng

doi:10.1016/j.jmapro.2020.06.005

Cited by 74 publications

(20 citation statements)

References 48 publications

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“… Nasrullah et al (2020) established 11 kinds of porous structures by topology optimization of lattice structures, and reported a conical lattice structure that can provide energy absorption of up to 127 kJ/kg. Zhang L. et al (2020) combined the topology optimization with numerical homogenization method to design high stiffness lattice structure, and successfully obtained a new lattice structure with high load-bearing and energy absorption capacity, and the relative elastic modulus can reach 0.037.…”

Section: The Structure Design Of Porous Metal Scaffoldsmentioning

confidence: 99%

Metal Material, Properties and Design Methods of Porous Biomedical Scaffolds for Additive Manufacturing: A Review

Wang

Liu

et al. 2021

Front. Bioeng. Biotechnol.

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Design an implant similar to the human bone is one of the critical problems in bone tissue engineering. Metal porous scaffolds have good prospects in bone tissue replacement due to their matching elastic modulus, better strength, and biocompatibility. However, traditional processing methods are challenging to fabricate scaffolds with a porous structure, limiting the development of porous scaffolds. With the advancement of additive manufacturing (AM) and computer-aided technologies, the development of porous metal scaffolds also ushers in unprecedented opportunities. In recent years, many new metal materials and innovative design methods are used to fabricate porous scaffolds with excellent mechanical properties and biocompatibility. This article reviews the research progress of porous metal scaffolds, and introduces the AM technologies used in porous metal scaffolds. Then the applications of different metal materials in bone scaffolds are summarized, and the advantages and limitations of various scaffold design methods are discussed. Finally, we look forward to the development prospects of AM in porous metal scaffolds.

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Section: The Structure Design Of Porous Metal Scaffoldsmentioning

confidence: 99%

Metal Material, Properties and Design Methods of Porous Biomedical Scaffolds for Additive Manufacturing: A Review

Wang

Liu

et al. 2021

Front. Bioeng. Biotechnol.

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“…Recent studies have been conducted on the design and testing of lattices fabricated by SLM [146,147]. In particular, a cubic lattice design was topologically optimized to show increased mechanical properties and energy absorption capabilities [148]. Along with enhanced topology, the implemented improvements include optimizing the printing param- Recent studies have been conducted on the design and testing of lattices fabricated by SLM [146,147].…”

Section: Selected Laser Sintering/melting (Sls/slm)mentioning

confidence: 99%

“…Along with enhanced topology, the implemented improvements include optimizing the printing param- Recent studies have been conducted on the design and testing of lattices fabricated by SLM [146,147]. In particular, a cubic lattice design was topologically optimized to show increased mechanical properties and energy absorption capabilities [148]. Along with enhanced topology, the implemented improvements include optimizing the printing parameters to limit the prevalence of metallurgical defects, which affect mechanical properties and part quality.…”

Section: Selected Laser Sintering/melting (Sls/slm)mentioning

confidence: 99%

Additive Manufacture of Small-Scale Metamaterial Structures for Acoustic and Ultrasonic Applications

et al. 2021

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Acoustic metamaterials are large-scale materials with small-scale structures. These structures allow for unusual interaction with propagating sound and endow the large-scale material with exceptional acoustic properties not found in normal materials. However, their multi-scale nature means that the manufacture of these materials is not trivial, often requiring micron-scale resolution over centimetre length scales. In this review, we bring together a variety of acoustic metamaterial designs and separately discuss ways to create them using the latest trends in additive manufacturing. We highlight the advantages and disadvantages of different techniques that act as barriers towards the development of realisable acoustic metamaterials for practical audio and ultrasonic applications and speculate on potential future developments.

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“…Laser powder bed fusion (LPBF), which applies a high-energy laser beam to melt pre-deposited metallic powder layer by layer according to the computer-aided design data, has been widely used in the preparation of many kinds of materials, such as steel, titanium, aluminum, and nickel [ 7 ]. To date, LPBF has shown great advantages and potential in the manufacture of complex parts [ 8 , 9 ]. In recent years, the application of high-power laser makes LPBF possible to manufacture materials with a high melting point directly, which has aroused the interests of people from industrial and research fields.…”

Section: Introductionmentioning

confidence: 99%

Laser Powder Bed Fusion of Pure Tungsten: Effects of Process Parameters on Morphology, Densification, Microstructure

Zhou

et al. 2020

Materials

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Tungsten has been widely used in many industrial fields due to its excellent properties. However, owing to its characteristics of inherent brittleness at room temperature and high melting point, it is difficult to prepare tungsten parts with high complexity via traditional methods. In the present work, tungsten samples were prepared by laser powder bed fusion. The influence of each process parameter including laser power, scanning speed, and hatch spacing on the surface morphology, densification, and microstructure of tungsten samples was systematically investigated. The results showed that the use of the appropriate parameters, especially high laser power, can effectively improve the surface quality and obtain a dense surface. The tungsten samples with a relative density of 98.31% were obtained with optimized parameter combinations: a laser power of 300 W, scanning speed of 400 mm/s, and hatch spacing of 0.08 mm. Compared with scanning speed and hatch spacing, the laser power had a more obvious influence on the relative density. Additionally, for the grain morphology by microstructure inspection, elongated curved grains gradually transformed into fine straight columnar grains as the scanning speed increased. The hatch spacing would change the grain morphology slightly but had no significant effect on the grain size.

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Topology-optimized lattice structures with simultaneously high stiffness and light weight fabricated by selective laser melting: Design, manufacturing and characterization

Cited by 74 publications

References 48 publications

Metal Material, Properties and Design Methods of Porous Biomedical Scaffolds for Additive Manufacturing: A Review

Metal Material, Properties and Design Methods of Porous Biomedical Scaffolds for Additive Manufacturing: A Review

Additive Manufacture of Small-Scale Metamaterial Structures for Acoustic and Ultrasonic Applications

Laser Powder Bed Fusion of Pure Tungsten: Effects of Process Parameters on Morphology, Densification, Microstructure

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