Experimental Evaluation of the Effects of Discrete-Grading-Induced Discontinuities on the Material Properties of Functionally Graded Ti-6Al-4V Lattices.

Junyang Ye, Ata Babazadeh-Naseri, C Fred Higgs Iii, Benjamin J Fregly

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Article in Materials (Basel, Switzerland), 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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4 authors.

Junyang YeDepartment of Mechanical Engineering, Rice University, Houston, TX 77005, USA.

Ata Babazadeh-NaseriDepartment of Mechanical Engineering, Rice University, Houston, TX 77005, USA.

C Fred Higgs IiiDepartment of Mechanical Engineering, Rice University, Houston, TX 77005, USA.

Benjamin J FreglyDepartment of Mechanical Engineering, Rice University, Houston, TX 77005, USA.ORCID 0000-0003-1166-4358

Funding

Cancer Prevention and Research Institute of Texas RR170026

6 · The paper itself

Abstract

In this study, we compared the material properties of linearly and sharply graded Ti6Al4V additively manufactured samples to investigate whether the more severe discontinuities caused by sharp grading can reduce performance. We performed compression testing with digital image correlation (DIC) in two loading directions for each grading design to simulate iso-stress and iso-strain conditions. We extracted the elastic stiffness, yield strength, yield strain, and energy absorption capacity of each sample. In addition, we used micro-computed tomography (micro-CT) imaging to examine the printing quality and dimensional accuracy. We found that sharply graded struts have a 12.95% increase in strut cross-sectional areas, whereas linearly graded struts produced an average of 49.24% increase compared to design. However, sharply graded and linearly graded FGL samples do not have statistically significant differences in elastic stiffness and yield strength. For the iso-strain condition, the average DIC-corrected stiffnesses for linearly and sharply graded samples were 6.15 GPa and 5.43 GPa, respectively (

Indexed as

digital image correlationexperimentalfunctionally graded latticehierarchical latticesmanufacturing defectsmicro-CTselective laser meltingTi-6Al-4V

Identifiers

PMID38399073

DOI10.3390/ma17040822

PMCPMC10889991

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