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ASTM Selected Technical Papers
Structural Integrity of Additive Manufactured Parts
By
Nima Shamsaei
Nima Shamsaei
Symposium Chair and STP Editor
1
Auburn University
,
Auburn, AL,
US
Search for other works by this author on:
Steve Daniewicz
Steve Daniewicz
Symposium Chair and STP Editor
2
The University of Alabama
,
Tuscaloosa, AL,
US
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Nik Hrabe
Nik Hrabe
Symposium Chair and STP Editor
3
National Institute of Standards and Technology
,
Boulder, CO,
US
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Stefano Beretta
Stefano Beretta
Symposium Chair and STP Editor
4
Politecnico di Milano
,
Milan,
IT
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Jess Waller
Jess Waller
Symposium Chair and STP Editor
5
National Aeronautics and Space Administration
,
HX5, Las Cruces, NM,
US
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Mohsen Seifi
Mohsen Seifi
Symposium Chair and STP Editor
6
ASTM International
,
Washington, DC,
US
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ISBN:
978-0-8031-7686-7
No. of Pages:
594
Publisher:
ASTM International
Publication date:
2020

Additive manufacturing (AM) using laser-based powder bed fusion (PBF) techniques results in a highly unique processing of material with complex, location-dependent thermal histories. The resulting microstructure and mechanical properties are highly dependent on the associated AM processing parameters and part geometry. To understand the property variation related to varying thermal profiles, a novel microscale testing technique was used to derive mechanical properties allowing for location- and orientation-specific characterization of the material that otherwise is masked with standard macroscale testing methods. Microtensile specimens with a footprint of 1 mm × 3 mm and a gauge section of 250 μm × 250 μm were extracted from part geometries designed to impart various thermal histories. The effects of build direction, sample orientation, and AM processing parameters also were studied. The utility of small-scale testing enabled characterization of properties of thin structural walls not measurable with conventional samples. A link between sample strength and build geometry, such as angle and wall thickness, was observed. The results are crucial to accurately design the AM process and to provide insight into the local mechanical performance of AM components.

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,
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,
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, and
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, “
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,”
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,
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,
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, and
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, “
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,”
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, no.
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3.
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,
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,
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,
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,
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, and
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, “
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,”
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(
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4.
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,
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,
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,
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,
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, and
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,”
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(
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Materials Science and Engineering: A
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12.
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,
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, and
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, “
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,”
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(
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Selective Laser Melting (SLM) of AlSi12Mg Lattice Structures
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16.
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, and
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Fatigue Performance Enhancement of Selectively Laser Melted Aluminium Alloy by Heat Treatment
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, August 10–12,
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).
17.
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,
Thijs
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,
Van Humbeeck
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, and
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, “
Mechanical Properties of AlSi10Mg Produced by Selective Laser Melting
,”
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18.
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,
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, and
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,”
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19.
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,”
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20.
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, “
Mechanical and Microstructural Characterization of Copper Microsamples after Cold Drawing
” (master's thesis,
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, Baltimore County,
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).
21.
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, “
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,”
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22.
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,
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, and
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,”
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25.
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, (
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26.
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, “
Strain Rate Sensitivity and Fracture Mechanism of AlSi10Mg Parts Produced by Selective Laser Melting
,”
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(
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27.
Aboulkhair
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,
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,
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, and
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Reducing Porosity in AlSi10Mg Parts Processed by Selective Laser Melting
,”
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(
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28.
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,
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,
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, and
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, “
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,”
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,”
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, no.
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(
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): 516–522.
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