Stability of crystallographic texture in laser powder bed fusion: Understanding the competition of crystal growth using a single crystalline seed

Ishimoto, Takuya; Hagihara, Koji; Hisamoto, Kenta et al.

Additive Manufacturing, 2021, 43, 102004

Number of Access:491（2025-07-18 10:09 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/89780

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Title
Stability of crystallographic texture in laser powder bed fusion: Understanding the competition of crystal growth using a single crystalline seed
Creator
NRID
1000050508835 1000050508835
ORCID
0000-0003-0081-0591 0000-0003-0081-0591
researchmap permalink
i_taku i_taku
Scopus Author ID
35310484700 35310484700
CreatorName
Ishimoto, Takuya
NRID
1000010346182 1000010346182
researchmap permalink
read0191194 read0191194
Scopus Author ID
7007016278 7007016278
CreatorName
Hagihara, Koji
CreatorName
Hisamoto, Kenta
NRID
1000030243182 1000030243182
ORCID
0000-0001-8052-1698 0000-0001-8052-1698
researchmap permalink
read0013987 read0013987
Scopus Author ID
7403896013 7403896013
CreatorName
Nakano, Takayoshi
Subject
Crystal growth
Crystallographic texture
Laser powder bed fusion
Single crystal
Stability
Description
Ishimoto T., Hagihara K., Hisamoto K., et al. Stability of crystallographic texture in laser powder bed fusion: Understanding the competition of crystal growth using a single crystalline seed. Additive Manufacturing, 43, 102004. https://doi.org/10.1016/j.addma.2021.102004.
Abstract
In metal additive manufacturing, crystallographic orientation control is a promising method for tailoring the functions of metallic parts. However, despite its importance in the fabrication of texture-controlled functional parts, the stability of the crystallographic texture is not widely discussed. Herein, the crystallographic texture stability under laser powder bed fusion was investigated. Two methodologies were employed. One is that a laser scanning strategy was alternately changed for a specific number of layers. The other is a “seeding” experiment in which single-crystalline substrates with controlled crystallographic orientations in the building (z-) direction and the xy-plane (perpendicular to the building direction) were used as the starting substrate. The transient zone width, where the crystallographic orientation was inherited from the layer beneath, was analyzed to evaluate the texture stability. The crystallographic direction of the seed within the xy-plane, rather than the building direction, determined the transient zone width, i.e., the texture stability. In particular, the texture in the newly deposited portion was stable when the laser scanning direction matched the <100> orientation in the underneath layer, otherwise the crystal orientation switched rapidly, such that the <100> orientation was parallel to the scanning direction. Interestingly, the crystallographic orientation along the building direction in the underneath layer hardly impacted the stability of the texture. Therefore, for the first time, it has been clarified that the <100> orientation in the scanning direction, rather than the building direction, was preferentially stabilized, whereas the orientation in the other directions secondary stabilized.
Publisher
Elsevier
Source Title
Additive Manufacturing
Volume (Issue)
43
Page
102004
Date of Issued
2021-07-01
Language
English
Handle URL
https://hdl.handle.net/11094/89780
eISSN
22148604
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1016/j.addma.2021.102004
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution 4.0 International License.
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Version of Record
Category
学術雑誌論文 Journal Article