【公開日：2025.06.10】【最終更新日：2025.04.18】
課題データ / Project Data
課題番号 / Project Issue Number
24NU0042
利用課題名 / Title
金属３Ｄプリンタ積層造形体の構造解析
利用した実施機関 / Support Institute
名古屋大学 / Nagoya Univ.
機関外・機関内の利用 / External or Internal Use
内部利用（ARIM事業参画者以外）/Internal Use (by non ARIM members)
技術領域 / Technology Area
【横断技術領域 / Cross-Technology Area】（主 / Main）計測・分析/Advanced Characterization（副 / Sub）-
【重要技術領域 / Important Technology Area】（主 / Main）高度なデバイス機能の発現を可能とするマテリアル/Materials allowing high-level device functions to be performed（副 / Sub）-
キーワード / Keywords
セラミックスデバイス/ Ceramic device,センサ/ Sensor,電子顕微鏡/ Electronic microscope,電子回折/ Electron diffraction
利用者と利用形態 / User and Support Type
利用者名（課題申請者）/ User Name (Project Applicant)
高田 尚記
所属名 / Affiliation
名古屋大学 大学院工学研究科
共同利用者氏名 / Names of Collaborators in Other Institutes Than Hub and Spoke Institutes
キムダソム,徐一璠,大谷祐貴
ARIM実施機関支援担当者 / Names of Collaborators in The Hub and Spoke Institutes
利用形態 / Support Type
（主 / Main）機器利用/Equipment Utilization（副 / Sub）-
利用した主な設備 / Equipment Used in This Project
NU-103：高分解能透過電子顕微鏡システム
NU-105：バイオ/無機材料用高速FIB-SEMシステム
報告書データ / Report
概要（目的・用途・実施内容）/ Abstract (Aim, Use Applications and Contents)
Cu-Cr-Zr (CuCrZr) alloy, which is one of the presentative precipitation hardening alloys, is a promising candidate for electric device materials and thermal management in automobiles and aerospace. It is necessary to control the morphologies/distribution of precipitates and solute content within the Cu (fcc) matrix of CuCrZr alloy, which are dominant contributors to determining the mechanical properties. Laser powder bed fusion (L-PBF) enables the manufacture of complex-shaped metallic components via a tremendously rapid solidification process, resulting in supersaturated solute Cr in L-PBF processed CuCrZr alloy. In this study, we investigated the strengthening mechanism of L-PBF-processed CuCrZr alloys via the microstructural change after heat treatment.
実験 / Experimental
Rectangular alloy samples
(15~60 × 60 × 70 mm3) were fabricated using the gas-atomized CuCrZr
alloy powder and SLM280PS machine (SLM Solutions GmbH, Germany) under a laser
scan speed of 0.6 m/s and laser power of 400 W. The applied laser-scanning
hatch distance, powder-bed thickness, and beam focus size were 0.07 mm, 0.03
mm, and 0.08 mm, respectively. The L-PBF sample was heat-treated at 500 °C for
1 h. Tensile tests were conducted at room temperature. The
microstructure was characterized via transmission electron microscope (TEM,
JEOL JEM-2100F/HK, Japan).
結果と考察 / Results and Discussion
The ultimate strength of the L-PBF CuCrZr alloy (250 MPa) was 2.3 times increased after heat treatment at 500 °C shown in Fig. 1. It was found that the fine Cr-rich phase is distributed within the Cu matrix shown in Fig. 2. Such Cr-rich phase was precipitated from the Cr saturated in the Cu matrix during the heat-treatment. That is, supersaturated Cr in the Cu matrix due to the rapid cooling rate of the L-PBF process contributed to the significant strengthening after heat treatment.
図・表・数式 / Figures, Tables and Equations
Fig. 1. Nominal stress-strain curves of L-PBF and subsequently heat-treated CuCrZr alloys.
Fig. 2. STEM image and corresponding EDS elemental maps of L-PBF CuCrZr alloy sample heat-treated at 500 °C for 1h.
その他・特記事項（参考文献・謝辞等） / Remarks(References and Acknowledgements)
The technical support of TEM operations by K. Higuchi and Y. Yamamoto was gratefully acknowledged.
成果発表・成果利用 / Publication and Patents
論文・プロシーディング（DOIのあるもの） / DOI (Publication and Proceedings)
-
Dasom Kim, Anomalous temperature-dependent strength of copper alloy manufactured by laser-beam powder bed fusion, Additive Manufacturing Letters, 11, 100236(2024).
DOI: https://doi.org/10.1016/j.addlet.2024.100236
口頭発表、ポスター発表および、その他の論文 / Oral Presentations etc.
- Dasom Kim, Naoki Takata, Junji Umeda, Toshihiko Shimizu, Makoto Kobashi, Oral Presentation, Unique High-Temperature Mechanical Behavior of CuCrZr Alloy Additive-Manufactured by Laser Powder Bed Fusion, 2024 MRS Fall Meeting & Exhibit (Boston), Dec. 2024.
- Kim Dasom、高田 尚記、梅田 隼史、清水 稔彦、小橋 眞，レーザー粉末床溶融結合法によるCuCrZr合金造形体の組織と強度に及ぼす熱処理の影響，ポスター発表，日本金属学会 2025年春期(第176回）講演大会（東京都立大学），2025年3月.
特許 / Patents
特許出願件数 / Number of Patent Applications：0件
特許登録件数 / Number of Registered Patents：0件