公募シンポジウム講演

[S6] S6.Creation of Materials by Super-Thermal Field II: Innovation in Materials Science through Additive Manufacturing（2）

レーザーや電子ビームを用いた局所加熱により生じる溶融と凝固は、粉末床溶融結合（Powder Bed Fusion: PBF）法に代表される付加製造（Additive Manufacturing: AM）などにおける結晶成長や材料組織形成に重要な役割を果たしていることが注目されている。特に、107 K/m以上にもおよぶ極めて大きな温度勾配（超温度場）の発現は、冷却速度106 K/s以上の超急冷、成長速度1 m/s におよぶ高速結晶成長を可能にし、絶対安定性などの特異現象の発現を伴うことから、従来プロセスでは困難であった組織制御などによる新材料創成の基盤としての多様な可能性を有している。本シンポジウムでは、この可能性に注目した学術変革領域研究「超温度場材料創成学」の研究を中心に、AMで発現する特異現象の解明や、AMによる新材料創成など、広くAMによる材料科学の新展開に関する議論と討論を行う。

Thu. Sep 19, 2024 12:55 PM - 5:50 PM Room O (A301 3st floor Building A Center for Education in Liberal Arts and Sciences)

Chair:Yoshiaki Toda

※表示の講演時間には質疑応答時間も含みます。
（質疑応答時間5分、基調講演と招待講演は5～10分）

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12:55 PM - 1:25 PM

[S6.24] Research on Microstructure and Mechanical Property Control of Structural Materials through Additive Manufacturing

*Ken CHO¹ (1. Osaka Univ.)

1:25 PM - 1:40 PM

[S6.25] Formation behavior of α₂/γ nano lamellar microstructure in β-containing TiAl alloys fabricated by metal 3D printing

*Yoshiki KONO¹, Cho Ken², Hiroyuki Yasuda², Masao Takeyama³, Takayoshi Nakano² (1. Osaka Univ., 2. Osaka Univ., 3. Tokyo Inst. of Technol.)

1:40 PM - 1:55 PM

[S6.26] Effect of microstructure on ductility of β-containing TiAl alloys fabricated by metal 3D printing

*Sho Yamada¹, Ken Cho¹, Hiroyuki Yasuda¹, Masao Takeyama², Takayoshi Nakano¹ (1. Osaka Univ., 2. Tokyo Inst. Technol.)

1:55 PM - 2:10 PM

[S6.27] Improved high-temperature tensile properties in γ-TiAl alloy fabricated by laser powder bed fusion

*SungHyun PARK¹, Ozkan GOKCEKAYA^1,2, Takayoshi NAKANO^1,2 (1. Osaka Univ. Grad. Eng., 2. Osaka Univ. AM Center)

2:10 PM - 2:25 PM

[S6.28] Observation of Antiphase Domains Structure in Fe₃Al Irradiated by Laser-Beam for Additive Manufacturing and Prediction of growth by Phase-Field Method

*Tsubasa SATO⁴, Yuheng LIU¹, Masayuki OKUGAWA^1,2, Kazuhisa SATO³, Hiroyuki YASUDA^1,2, Takayoshi NAKANO^1,2, Yuichiro Koizumi^1,2 (1. Osaka Univ., 2. Osaka Univ. AM center, 3. Osaka Univ. UHVEM, 4. Osaka Univ.)

break (2:25 PM - 2:35 PM)

2:35 PM - 3:15 PM

[S6.29] [Keynote Lecture] Control of phase and mechanical function of Ti alloys by mixing pure metal powders using laser powder bed fusion

*Takuya ISHIMOTO^1,2, Yuuki NISHIKAWA², Ryosuke OZASA², Kazuhisa SATO³, Takayoshi NAKANO² (1. Aluminium Research Center, Univ. Toyama, 2. Grad. Sch. of Eng., Osaka Univ., 3. Research Center for UHVEM, Osaka Univ.)

3:15 PM - 3:30 PM

[S6.30] Prediction for CCT Curve for Titanium Alloy Based on Energetics

*Yoshiaki TODA¹, Nina KOBATA¹, Masahiko DEMURA¹, Yoko YAMABE-MITARAI² (1. National Institute for Materials Science, 2. The University of Tokyo)

3:30 PM - 3:45 PM

[S6.31] Tailored crystallographic texture improves creep performance in Ti6246 fabricated by Laser-based Powder Bed Fusion (PBF-LB)

*Prince COBBINAH¹, Sae Matsunaga¹, Yoshiaki Toda², Ryosuke Ozasa³, Takuya Ishimoto^3,4, Takayoshi Nakano³, Yoko Yamabe-Mitarai¹ (1. UTokyo、2. NIMS、3. Osaka University、4. University of Toyama)

3:45 PM - 4:05 PM

[S6.32] Effect of building parameters on the microstructures and mechanical properties of Ti−6Al−4V alloys prepared by electron beam powder bed fusion

*Kenta YAMANAKA¹, Manami Mori², Yusuke Onuki³, Shigeo Sato⁴ (1. IMR, Tohoku Univ., 2. NIT Sendai Col., 3. Tokyo Denki Univ., 4. Ibaraki Univ)

4:05 PM - 4:25 PM

[S6.33] Thermophysical property measurement of Ti-Nb melts using electromagnetic levitation technique

*Masayoshi ADACHI¹, Ryo Ogasawara¹, Makoto Ohtsuka¹, Hiroyuki Fukuyama¹ (1. Tohoku Univ.)

break (4:25 PM - 4:35 PM)

4:35 PM - 4:55 PM

[S6.34] Deformation and transformation behavior of Ti-Cr-Sn superelastic alloys fabricated by L-PBF

*Cheng Chen¹, Naoki Nohira², Ryosuke Ozasa³, Masaki Tahara², Takuya Ishimoto^3,4,5, Yuichiro Koizumi^3,4, Takayoshi Nakano^3,4, Hideki Hosoda² (1. IIR (Graduate student), Tokyo Tech, 2. IIR, Tokyo Tech, 3. Graduate School of Engineering, Osaka Univ., 4. AM Center, Osaka Univ., 5. Aluminium Research Center, Univ. Toyama)

4:55 PM - 5:10 PM

[S6.35] Development of Functionalized Metastable β-type Titanium-based Alloy through Laser-Powder Bed Fusion

*Keitaro Miyasawa¹, Ryosuke Ozasa^1,2, Daisuke Egusa³, Eigi Abe³, Masakazu Tane^1,2, Takayoshi Nakano^1,2 (1. 大阪大工、2. 大阪大AMセ、3. 東京大工)

5:10 PM - 5:30 PM

[S6.36] Strong orientation formation in α Titanium alloy with solute via LPBF process

*Shota KARIYA¹, Takuma TERAMAE², Jeff HUANG², Ammarueda ISSARIYAPAT¹, Junko UMEDA¹, Katsuyoshi KONDOH¹ (1. JWRI, Osaka univ., 2. Osaka univ.)

5:30 PM - 5:50 PM

[S6.37] Microstructure and deformation mechanisms of additively manufactured titanium alloys with high oxygen contents

*Akira OTSU^1,2, Tomoya MORI², Tetsuhiko ONDA², Takahiro KIMURA³, Takayuki NAKAMOTO³, Zhong-Chun CHEN² (1. HITec, 2. Tottori Univ., 3. ORIST)

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