Influence of the structural orientation on the mechanical properties of selective laser melted Ti6Al4V open-porous scaffolds

Weißmann, Volker; Bader, Rainer; Hansmann, Harald; Laufer, Nico

doi:10.1016/j.matdes.2016.01.095

Cited by 136 publications

(66 citation statements)

References 58 publications

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“…A good indicator for this are the different slopes in the correlations found. The influence of orientation on the microstructure and on the mechanical properties is known [19,25]. This influence also becomes clear here.…”

Section: Discussionmentioning

confidence: 63%

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Comparison of Single Ti6Al4V Struts Made Using Selective Laser Melting and Electron Beam Melting Subject to Part Orientation

Weißmann

Drescher

Bader

et al. 2017

Metals

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Abstract:The use of additive manufacturing technologies to produce lightweight or functional structures is widespread. Especially Ti 6 Al 4 V plays an important role in this development field and parts are manufactured and analyzed with the aim to characterize the mechanical properties of open-porous structures and to generate scaffolds with properties specific to their intended application. An SLM and an EBM process were used respectively to fabricate the Ti 6 Al 4 V single struts. For mechanical characterization, uniaxial compression tests and hardness measurements were conducted. Furthermore, the struts were manufactured in different orientations for the determination of the mechanical properties. Roughness measurements and a microscopic characterization of the struts were also carried out. Some parts were characterized following heat treatment (hot isostatic pressing). A functional correlation was found between the compressive strength and the slenderness ratio (λ) as well as the equivalent diameter (d) and the height (L) of EBM and SLM parts. Hardness investigations revealed considerable differences related to the microstructure. An influence of heat treatment as well as of orientation could be determined. In this work, we demonstrate the influence of the fabrication quality of single struts, the roughness and the microstructure on mechanical properties as a function of orientation.

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Section: Discussionmentioning

confidence: 63%

“…In the development of open porous load-bearing structures, the orientation of the load-bearing rods and the load angle [16][17][18][19] as well as the relationship between elastic modulus and porosity play an important role [20,21].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Single Ti6Al4V Struts Made Using Selective Laser Melting and Electron Beam Melting Subject to Part Orientation

Weißmann

Drescher

Bader

et al. 2017

Metals

Self Cite

View full text Add to dashboard Cite

show abstract

“…Due to the principle of these additive technologies, it is possible to expect some differences in structure, mechanical, or fatigue properties with respect to the direction of building the part [16][17][18][19][20].…”

Section: Research Activities Related To Dmls/slm Of Ti6al4vmentioning

confidence: 99%

“…Weißmann, in [16], examined the mechanical properties of open porous structures with a different cell orientation against the load direction. It has been found that the elementary cell orientation affects the mechanical properties of the entire structure.…”

Section: Research Activities Related To Dmls/slm Of Ti6al4vmentioning

confidence: 99%

Influence of Build Orientation, Heat Treatment, and Laser Power on the Hardness of Ti6Al4V Manufactured Using the DMLS Process

Guzanová

Ižaríková

Brezinová

et al. 2017

Metals

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This contribution is focused on the influence of build orientation on hardness of materials sintered using direct metal laser sintering (DMLS) technology. It builds on the current research works that has monitored the influence of build orientation on a fatigue life, mechanical properties, roughness after machining, etc. In the mentioned work, a slight influence of build orientation on the above properties was shown. The hardness was measured on a Ti6Al4V alloy which was made of powder by DMLS technology. The individual materials were sintered at different laser powers, then annealed to remove internal stresses. Part of the experiment examined the metallographic analysis of materials in the direction perpendicular to the sintered layers and parallel with the sintered layers. Microhardness was measured on metallographic cross-sections and the results were statistically processed. The influence of laser power on a respective material hardness was assessed by one-way analysis of variance (ANOVA), a comparison of the hardness between sintered and sintered-annealed samples, as well as the comparison of hardness in the two considered directions was performed by t-test and F-test. A statistically significant difference in the hardness of the materials prepared at different laser powers was found. The influence of heat treatment, as well as the direction of material building also showed a statistically significant difference.

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“…For more examples, Pattanayak et al [111] successfully fabricated Ti metals with structures analogous to the human cancellous bone through optimizing SLM parameters such as laser power, hatching pattern and scanning speed. A lately study conducted by Weißmann et al [112] confirmed the feasibility of fabricating lattice structures in Ti-6Al-4V with high geometrical accuracy using SLM [112]. Again, their works proved that SLM was a great useful technique for manufacturing customized bioimplants with complicated internal structures.…”

Section: Selective Laser Meltingmentioning

confidence: 97%

State of the art of bioimplants manufacturing: part I

Kang

Fang

2018

Adv. Manuf.

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Bioimplants are becoming increasingly important in the modern society due to the fact of an aging population and associated issues of osteoporosis and osteoarthritis. The manufacturing of bioimplants involves an understanding of both mechanical engineering and biomedical science to produce biocompatible products with adequate lifespans. A suitable selection of materials is the prerequisite for a long-term and reliable service of the bioimplants, which relies highly on the comprehensive understanding of the material properties. In this paper, most biomaterials used for bioimplants are reviewed. The typical manufacturing processes are discussed in order to provide a perspective on the development of manufacturing fundamentals and latest technologies. The review also contains a discussion on the current measurement and evaluation constraints of the finished bioimplant products. Potential future research areas are presented at the end of this paper.

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Influence of the structural orientation on the mechanical properties of selective laser melted Ti6Al4V open-porous scaffolds

Cited by 136 publications

References 58 publications

Comparison of Single Ti6Al4V Struts Made Using Selective Laser Melting and Electron Beam Melting Subject to Part Orientation

Comparison of Single Ti6Al4V Struts Made Using Selective Laser Melting and Electron Beam Melting Subject to Part Orientation

Influence of Build Orientation, Heat Treatment, and Laser Power on the Hardness of Ti6Al4V Manufactured Using the DMLS Process

State of the art of bioimplants manufacturing: part I

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