Direct measurement of the effective properties of an additively manufactured titanium octet truss unit cell using high energy X-ray diffraction

Johnson, Nathan S.; Strantza, Maria; Matthews, Manyalibo J.; Park, Jun-Sang; Kenesei, Peter; Clausen, Bjørn; Brown, Donald William; Carpenter, John S.; Brice, Craig A.; Stebner, Aaron P.

doi:10.1016/j.matchar.2024.113755

Title: Direct measurement of the effective properties of an additively manufactured titanium octet truss unit cell using high energy X-ray diffraction

Journal Article · 16 February 2024 · Materials Characterization

DOI: https://doi.org/10.1016/j.matchar.2024.113755 · OSTI ID:2315661

Johnson, Nathan S. ^[1]; Strantza, Maria ^[2]; Matthews, Manyalibo J. ^[2]; Park, Jun-Sang ^[3]; Kenesei, Peter ^[3];

^[4];

^[4]; Brice, Craig A. ^[5]; Stebner, Aaron P. ^[6]

Colorado School of Mines, Golden, CO (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Argonne National Laboratory (ANL), Argonne, IL (United States)
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Colorado School of Mines, Golden, CO (United States)
Georgia Institute of Technology, Atlanta, GA (United States)

Additively manufactured lattice structures offer a high specific strength-to-density ratio in comparison to conventional, fully dense parts. The small feature size and intricate geometry of lattice structures make it challenging to directly characterize their mechanical properties. This study presents direct measurement of the elastic mechanical properties of an additively manufactured titanium alloy octet truss unit cell. Strut stress and strain were measured using high-energy X-ray diffraction during quasi-static compressive loading. The crystallographic stress-strain relationship was converted into the stress-strain relationship of the octet truss lattice unit cell using the known symmetry of the struts. The sample studied herein was best fit by an orthorhombic linear elastic stress-strain relationship. In conclusion, this technique shows promise for studying additively manufactured lattice structures at length scales not previously reported.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)

Grant/Contract Number:: 89233218CNA000001; AC02-06CH11357; AC52-07NA27344

OSTI ID:: 2315661

Alternate ID(s):: OSTI ID: 2311228; OSTI ID: 2550555; OSTI ID: 2563328

Report Number(s):: LA-UR--23-29235; LLNL--JRNL-853356

Journal Information:: Materials Characterization, Journal Name: Materials Characterization Vol. 209; ISSN 1044-5803

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Related Subjects

36 MATERIALS SCIENCE
Octet truss
Lattices
Octet truss lattice
Additive manufacturing
Advanced characterization
X-ray
Diffraction
X-ray diffraction
Synchrotron
In situ
Mechanical
Mechanical characterization

Title: Direct measurement of the effective properties of an additively manufactured titanium octet truss unit cell using high energy X-ray diffraction

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