Comparison of in-plane compression of additively manufactured Ti6Al4V 2D auxetic structures: Lattice design, manufacturing speed, and failure mode

Eren, Zana; Gokcekaya, Ozkan; Balkan, Demet et al.

Materials and Design, 2024, 241, 112885

Number of Access:392（2025-08-21 04:36 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/97263

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Title
Comparison of in-plane compression of additively manufactured Ti6Al4V 2D auxetic structures: Lattice design, manufacturing speed, and failure mode
Creator
CreatorName
Eren, Zana
ORCID
0000-0002-9258-858X 0000-0002-9258-858X
Scopus Author ID
37051975500 37051975500
NRID
1000050988160 1000050988160
CreatorName
Gokcekaya, Ozkan
CreatorName
Balkan, Demet
NRID
1000030243182 1000030243182
ORCID
0000-0001-8052-1698 0000-0001-8052-1698
researchmap permalink
read0013987 read0013987
Scopus Author ID
7403896013 7403896013
CreatorName
Nakano, Takayoshi
CreatorName
Mecitoğlu, Zahit
Subject
Additive manufacturing
Auxetic structures
Compressive failures
Energy absorption
Residual stress
Description
Eren Z., Gokcekaya O., Balkan D., et al. Comparison of in-plane compression of additively manufactured Ti6Al4V 2D auxetic structures: Lattice design, manufacturing speed, and failure mode. Materials and Design 241, 112885 (2024); https://doi.org/10.1016/j.matdes.2024.112885.
Abstract
The metal-based 2D auxetic lattice structures hold the potential for multifunctional tasks in aerospace applications. However, the compression response of those manufactured by powder bed fusion process is underexplored. This study proposes a comprehensive comparison of in-plane quasi-static compression performance of 2D auxetic lattice structures, utilizing three designs (anti-tetrachiral (ATC), double arrow-headed (DAH), and tree-like re-entrant (TLR)), manufactured with stiff Ti6Al4V by the electron beam powder bed fusion process (PBF-EB) with various manufacturing speeds. The results revealed unique failure patterns and superior energy absorptions among 2D lattice structures in the literature. TLR design enhanced energy absorption by overcoming failures between DAH columns and exhibited the lowest standard deviations in specific energy absorption (SEA) values (9.75 %–12.62 %). Besides, Kernel average misorientation (KAM) values followed the order of DAH, TLR, and ATC, and inversely correlated with SEA values. ATC structures with the lowest KAM outperformed DAH and TLR by 47.5 % and 6.44 %, respectively. Scan speed variations affected SEA and porosity values differently for each lattice design while exhibiting similar microstructure characteristics. The findings in this study propose a significant contribution to the development of aerospace sandwich structures where harsh environments exist and employment of 2D topologies are required.
Publisher
Elsevier Ltd
Source Title
Materials and Design
Volume (Issue)
241
Page
112885
Date of Issued
2024-05-01
Language
English
Handle URL
https://hdl.handle.net/11094/97263
PISSN
02641275
eISSN
18734197
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1016/j.matdes.2024.112885
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution 4.0 International License.
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Category
学術雑誌論文 Journal Article