In-plane quasi-static compression deformation of Ti6Al4V double arrow-headed lattice structures fabricated by electron beam powder bed fusion process: Build orientation, scan speed and failure mechanism

Eren, Zana; Gokcekaya, Ozkan; Nakano, Takayoshi; Mecitoğlu, Zahit

doi:https://doi.org/10.1016/j.jmrt.2023.11.027

In-plane quasi-static compression deformation of Ti6Al4V double arrow-headed lattice structures fabricated by electron beam powder bed fusion process: Build orientation, scan speed and failure mechanism

Eren, Zana; Gokcekaya, Ozkan; Nakano, Takayoshi et al.

Journal of Materials Research and Technology, 2023, 27, 6192-6210

Number of Access:395（2025-08-21 04:36 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/93387

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Title	In-plane quasi-static compression deformation of Ti6Al4V double arrow-headed lattice structures fabricated by electron beam powder bed fusion process: Build orientation, scan speed and failure mechanism
Creator	CreatorName Eren, Zana
	ORCID 0000-0002-9258-858X 0000-0002-9258-858X Scopus Author ID 37051975500 37051975500 NRID 1000050988160 1000050988160 CreatorName Gokcekaya, Ozkan
	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	Compression deformation
	Double arrow-headed lattice
	Electron beam powder bed fusion process
	Mechanical metamaterials
	Microstructure
Description	Eren Z., Gokcekaya O., Nakano T., et al. In-plane quasi-static compression deformation of Ti6Al4V double arrow-headed lattice structures fabricated by electron beam powder bed fusion process: Build orientation, scan speed and failure mechanism. Journal of Materials Research and Technology 27, 6192 (2023); https://doi.org/10.1016/j.jmrt.2023.11.027.
Abstract	The 2D double arrow-headed (DAH) lattice structures, which are promising cellular structures for impact mitigation, remain relatively unexplored in terms of their compression response when manufactured using the powder bed fusion process with Ti6Al4V (Ti64) alloy. This study aims to investigate the effects of build orientation and beam scan speed of Electron Beam Powder Bed Fusion (PBF-EB) process on the energy absorption of 2D Ti64 DAH lattice structures. Additionally, potential microstructural variations due to adjusted process parameters can be linked to different levels of energy absorption. For the compressions, the lattice structures were manufactured at two build orientations (0° and 45°), using three different beam scan speeds: speed function (SF), low speed (LS), high speed (HS). In micro-characterizations, the unit cells of 0deg-LS exhibited the lowest micro-porosity level at 0.12 %. Based on KAM values, thin struts at unit cells had higher residual stresses than thick struts, contributing to the initiation of failure locations. The compressions revealed that the 0deg-LS group absorbed 21.6 % and 24 % more energy than 0deg-SF and 0deg-HS groups, respectively, at compressions of 33 %. 45° samples absorbed approximately 10 % more energy than 0° samples except HS groups. The lowest micro-porosity of 0deg-LS contributed to having the highest energy absorption among 0deg samples. As the residual stresses in KAM values did not differ strongly with varying beam speed, varied energy absorptions were not linked to them. An optimization of the numerical compressions helped obtain designs with higher energy absorption and less relative volume. This study provides valuable insights into Ti64 cellular applications constrained with 2D-type designs.
Publisher	Elsevier Editora Ltda
Source Title	Journal of Materials Research and Technology
Volume (Issue)	27
Page	6192-6210
Date of Issued	2023-11-18
Language	English
Handle URL	https://hdl.handle.net/11094/93387
PISSN	22387854
Relation.isIdenticalTo	DOI (Publisher Version) https://doi.org/10.1016/j.jmrt.2023.11.027
Access Rights	open access
CopyRight	This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
oaire:version	Version of Record
Category	学術雑誌論文 Journal Article

Resource Type	journal article
Local Type	Journal Article
DCMI Type	Text
DCTERMS.bibliographicCitation	Journal of Materials Research and Technology. 2023, 27, p. 6192-6210
DC.title	In-plane quasi-static compression deformation of Ti6Al4V double arrow-headed lattice structures fabricated by electron beam powder bed fusion process: Build orientation, scan speed and failure mechanism
DC.creator	Eren, Zana
	Gokcekaya, Ozkan
	Nakano, Takayoshi
	Mecitoğlu, Zahit
DC.publisher	Elsevier Editora Ltda
DC.language' scheme='DCTERMS.RFC1766	English
DC.type' scheme='DCTERMS.DCMIType	Text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2023-11-18
DC.identifier	https://doi.org/10.1016/j.jmrt.2023.11.027
DC.subject	Compression deformation
	Double arrow-headed lattice
	Electron beam powder bed fusion process
	Mechanical metamaterials
	Microstructure
DC.description	Eren Z., Gokcekaya O., Nakano T., et al. In-plane quasi-static compression deformation of Ti6Al4V double arrow-headed lattice structures fabricated by electron beam powder bed fusion process: Build orientation, scan speed and failure mechanism. Journal of Materials Research and Technology 27, 6192 (2023); https://doi.org/10.1016/j.jmrt.2023.11.027.
DCTERMS.abstract	The 2D double arrow-headed (DAH) lattice structures, which are promising cellular structures for impact mitigation, remain relatively unexplored in terms of their compression response when manufactured using the powder bed fusion process with Ti6Al4V (Ti64) alloy. This study aims to investigate the effects of build orientation and beam scan speed of Electron Beam Powder Bed Fusion (PBF-EB) process on the energy absorption of 2D Ti64 DAH lattice structures. Additionally, potential microstructural variations due to adjusted process parameters can be linked to different levels of energy absorption. For the compressions, the lattice structures were manufactured at two build orientations (0° and 45°), using three different beam scan speeds: speed function (SF), low speed (LS), high speed (HS). In micro-characterizations, the unit cells of 0deg-LS exhibited the lowest micro-porosity level at 0.12 %. Based on KAM values, thin struts at unit cells had higher residual stresses than thick struts, contributing to the initiation of failure locations. The compressions revealed that the 0deg-LS group absorbed 21.6 % and 24 % more energy than 0deg-SF and 0deg-HS groups, respectively, at compressions of 33 %. 45° samples absorbed approximately 10 % more energy than 0° samples except HS groups. The lowest micro-porosity of 0deg-LS contributed to having the highest energy absorption among 0deg samples. As the residual stresses in KAM values did not differ strongly with varying beam speed, varied energy absorptions were not linked to them. An optimization of the numerical compressions helped obtain designs with higher energy absorption and less relative volume. This study provides valuable insights into Ti64 cellular applications constrained with 2D-type designs.
DC.rights	This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
DC.format	93387
citation_title	In-plane quasi-static compression deformation of Ti6Al4V double arrow-headed lattice structures fabricated by electron beam powder bed fusion process: Build orientation, scan speed and failure mechanism
citation_author	Eren, Zana
	Gokcekaya, Ozkan
	Nakano, Takayoshi
	Mecitoğlu, Zahit
citation_publisher	Elsevier Editora Ltda
citation_language	English
citation_date	2023-11-18
citation_journal_title	Journal of Materials Research and Technology
citation_volume	27
citation_firstpage	6192
citation_lastpage	6210
citation_doi	https://doi.org/10.1016/j.jmrt.2023.11.027
citation_public_url	https://hdl.handle.net/11094/93387

In-plane quasi-static compression deformation of Ti6Al4V double arrow-headed lattice structures fabricated by electron beam powder bed fusion process: Build orientation, scan speed and failure mechanism

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