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  1. B200 工学部/工学研究科
  2. B200a 雑誌掲載論文
  3. 学術雑誌

Microstructure and compressive properties of porous hybrid materials consisting of ductile Al/Ti and brittle Al3Ti phases fabricated by reaction sintering with space holder

http://hdl.handle.net/2237/00032346
457620c1-8acf-4036-92cc-6a7082397909
名前 / ファイル ライセンス アクション
manuscript.pdf manuscript (1.2 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2020-06-11
タイトル
タイトル Microstructure and compressive properties of porous hybrid materials consisting of ductile Al/Ti and brittle Al3Ti phases fabricated by reaction sintering with space holder
著者 Suzuki, Asuka

× Suzuki, Asuka

WEKO 99586

Suzuki, Asuka

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Kosugi, Naoki

× Kosugi, Naoki

WEKO 99587

Kosugi, Naoki

Search repository
Takata, Naoki

× Takata, Naoki

WEKO 99588

Takata, Naoki

Search repository
Kobashi, Makoto

× Kobashi, Makoto

WEKO 99589

Kobashi, Makoto

Search repository
権利
権利情報 © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
キーワード
主題Scheme Other
主題 Porous metals
キーワード
主題Scheme Other
主題 Energy absorption
キーワード
主題Scheme Other
主題 Reaction sintering
キーワード
主題Scheme Other
主題 Space holder method
キーワード
主題Scheme Other
主題 Ductile/brittle phases hybrid
キーワード
主題Scheme Other
主題 Titanium aluminide
抄録
内容記述 The strain-hardening of cell wall in porous metals decreases the energy absorption properties. In order to suppress the strain hardening, porous hybrid materials consisting of ductile Al and Ti phases and brittle Al3Ti phase were synthesized by reaction sintering between Al and Ti powders with NaCl space holder. Changes in the porous structure and microstructure with sintering were investigated. Area fraction of Al3Ti phase formed at Al/Ti interface increased following the Johnson-Mehl-Avrami-Koromogrov (JMAK) equation of three-dimensional diffusion-controlled growth with zero nucleation rate. The growth of Al3Ti phase led to the formation of pores and cracks in cell wall by Kirkendall effect and volume shrinkage. Effect of microstructure on compressive properties of the porous Al/Al3Ti/Ti hybrids were also investigated. Porous hybrids consisting of α-Al matrix exhibited the plateau region with positive slopes due to the strain hardening of α-Al phase. Porous hybrids consisting of Al3Ti matrix exhibited the plateau region with the slope of almost zero, resulting in high energy absorption capacity and efficiency. Fractography revealed that crack propagated in brittle Al3Ti phase but arrested at α-Al phase. These results were used to discuss the microstructure for improving energy absorption properties.
内容記述タイプ Abstract
内容記述
内容記述 ファイル公開:2022-03-03
内容記述タイプ Other
出版者
出版者 Elsevier
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
DOI
関連識別子
識別子タイプ DOI
関連識別子 https://doi.org/10.1016/j.msea.2020.139000
ISSN(print)
収録物識別子タイプ ISSN
収録物識別子 0921-5093
書誌情報 Materials Science and Engineering: A

巻 776, p. 139000, 発行日 2020-03-03
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