Lattice distortion in selective laser melting (SLM)-manufactured unstable β-type Ti-15Mo-5Zr-3Al alloy analyzed by high-precision X-ray diffractometry

Takase, Aya; Ishimoto, Takuya; Suganuma, Ryoya et al.

Scripta Materialia, 2021, 201, 113953

アクセス数:614件（2026-02-05 21:28 集計）

固定URL: https://hdl.handle.net/11094/89777

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タイトル
Lattice distortion in selective laser melting (SLM)-manufactured unstable β-type Ti-15Mo-5Zr-3Al alloy analyzed by high-precision X-ray diffractometry
著者
著者名
Takase, Aya
NRID
1000050508835 1000050508835
ORCID
0000-0003-0081-0591 0000-0003-0081-0591
researchmap permalink
i_taku i_taku
Scopus Author ID
35310484700 35310484700
著者名
Ishimoto, Takuya
著者名
Suganuma, Ryoya
NRID
1000030243182 1000030243182
ORCID
0000-0001-8052-1698 0000-0001-8052-1698
researchmap permalink
read0013987 read0013987
Scopus Author ID
7403896013 7403896013
著者名
Nakano, Takayoshi
キーワード等
Crystal structure
Residual stresses
Selective laser melting (SLM)
X-ray diffraction (XRD)
β-type titanium alloys
内容
Takase A., Ishimoto T., Suganuma R., et al. Lattice distortion in selective laser melting (SLM)-manufactured unstable β-type Ti-15Mo-5Zr-3Al alloy analyzed by high-precision X-ray diffractometry. Scripta Materialia, 201, 113953. https://doi.org/10.1016/j.scriptamat.2021.113953.
抄録
A peculiar lattice distortion in a selective laser melting (SLM)-manufactured unstable β-type Ti-15Mo-5Zr-3Al was observed for the first time, through high-precision X-ray diffraction (XRD) analyses. After SLM, Ti-15Mo-5Zr-3Al exhibited a body-centered-tetragonal structure instead of a body-centered-cubic structure; the c-axis was 0.63% shorter than the a-axis. The XRD analyses also revealed tensile residual stresses of 210 ± 12 MPa at the specimen surface. A numerical simulation indicated rapid cooling during the SLM, which could have caused the residual stresses. A comparison of the partially stress-released SLM specimen and an electron beam melting-manufactured specimen with negligible residual stress suggested that the residual stress caused by the rapid cooling in SLM induced the lattice distortion. This finding is not consistent with the previous understanding that residual stress changes the lattice parameter without lattice distortion. This study provides new insight into lattice distortion generated by a combination of SLM-specific ultrarapid cooling and unstable phases.
出版者
Acta Materialia Inc.
収録物名
Scripta Materialia
巻(号)
201
ページ
113953
刊行年月
2021-08-01
言語
英語
ハンドルURL
https://hdl.handle.net/11094/89777
PISSN
13596462
NCID
AA11067905
関連情報 (isIdenticalTo)
DOI (出版社版)
https://doi.org/10.1016/j.scriptamat.2021.113953
アクセス権
open access
権利情報
This article is licensed under a Creative Commons Attribution 4.0 International License.
出版タイプ
Version of Record
カテゴリ
学術雑誌論文 Journal Article