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jwri40_02_063
pdf
1.64 MB
532
論文情報
タイトル
Mechanical Properties and Strengthening Mechanism of Pure Ti Powder Composite Material Reinforced with Carbon Nano Particles
著者
Mimoto, Takanori
Mimoto, Takanori
Nakanishi, Nozomi
Nakanishi, Nozomi
Umeda, Junko
Umeda, Junko
Kondoh, Katsuyoshi
Kondoh, Katsuyoshi
キーワード等
Titanium matrix composite
Carbon black particles
Tensile properties
Solid solution hardening
Dispersion strengthening
In-situ formed titanium carbide
抄録
The strengthening mechanisms of titanium-carbon black (CB) nano particle composite materials were investigated quantitatively in the present study. The titanium matrix composite (TMC) specimens were prepared via a powder metallurgy (P/M) route including the wet coating process for composite titanium (Ti) powders with un-bundled CB nano particles, consolidation by spark plasma sintering (SPS) and subsequent hot extrusion. The extruded TMC, with carbon content of 2.66 at.%, exhibited excellent tensile strength of 837 MPa in 0.2%YS, 899 MPa in UTS and 18.7% in elongation at ambient temperature. In this composite, some of additive CB nano particles were dissolved into the Ti matrix as a solid solution element. The other CBs and Ti matrix were chemically reacted when sintering, and resulted in the in-situ formed titanium carbide (TiC) compounds, which were uniformly distributed throughout the Ti matrix. These TiC dispersoids promoted the dynamic recrystallization during hot extrusion process, and resulted in the Ti grain refinement. Consequently, carbon solid solution hardening, TiC dispersion strengthening and grain refinement enhanced the mechanical performance of the TMC. In particular, the effect of TiC reinforcements, accounting for about 60% of the whole strengthening behavior, played the most significant role.
公開者
大阪大学接合科学研究所
公開者の別表記
Joining and Welding Research Institute, Osaka University
公開者 (ヨミ)
オオサカ ダイガク セツゴウ カガク ケンキュウジョ
掲載誌名
Transactions of JWRI
巻
40
号
2
開始ページ
63
終了ページ
68
刊行年月
2011-12
ISSN
03874508
NCID
AA00867058
URL
http://hdl.handle.net/11094/5200
言語
英語
カテゴリ
紀要論文 Departmental Bulletin Paper
Transactions of JWRI / Vol.40 No.2 (2011-12)
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著者版フラグ
publisher
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text
DCTERMS.bibliographicCitation
Transactions of JWRI.40(2) P.63-P.68
DC.title
Mechanical Properties and Strengthening Mechanism of Pure Ti Powder Composite Material Reinforced with Carbon Nano Particles
DC.creator
Mimoto, Takanori
Nakanishi, Nozomi
Umeda, Junko
Kondoh, Katsuyoshi
DC.publisher
大阪大学接合科学研究所
DC.language" scheme="DCTERMS.RFC1766
英語
DCTERMS.issued" scheme="DCTERMS.W3CDTF
2011-12
DC.identifier" scheme="DCTERMS.URI
http://hdl.handle.net/11094/5200
DC.subject
Titanium matrix composite
Carbon black particles
Tensile properties
Solid solution hardening
Dispersion strengthening
In-situ formed titanium carbide
DCTERMS.abstract
The strengthening mechanisms of titanium-carbon black (CB) nano particle composite materials were investigated quantitatively in the present study. The titanium matrix composite (TMC) specimens were prepared via a powder metallurgy (P/M) route including the wet coating process for composite titanium (Ti) powders with un-bundled CB nano particles, consolidation by spark plasma sintering (SPS) and subsequent hot extrusion. The extruded TMC, with carbon content of 2.66 at.%, exhibited excellent tensile strength of 837 MPa in 0.2%YS, 899 MPa in UTS and 18.7% in elongation at ambient temperature. In this composite, some of additive CB nano particles were dissolved into the Ti matrix as a solid solution element. The other CBs and Ti matrix were chemically reacted when sintering, and resulted in the in-situ formed titanium carbide (TiC) compounds, which were uniformly distributed throughout the Ti matrix. These TiC dispersoids promoted the dynamic recrystallization during hot extrusion process, and resulted in the Ti grain refinement. Consequently, carbon solid solution hardening, TiC dispersion strengthening and grain refinement enhanced the mechanical performance of the TMC. In particular, the effect of TiC reinforcements, accounting for about 60% of the whole strengthening behavior, played the most significant role.
citation_title
Mechanical Properties and Strengthening Mechanism of Pure Ti Powder Composite Material Reinforced with Carbon Nano Particles
citation_author
Mimoto, Takanori
Nakanishi, Nozomi
Umeda, Junko
Kondoh, Katsuyoshi
citation_publisher
大阪大学接合科学研究所
citation_language
英語
citation_date
2011-12
citation_journal_title
Transactions of JWRI
citation_volume
40
citation_issue
2
citation_firstpage
63
citation_lastpage
68
citation_issn
03874508
citation_public_url
http://hdl.handle.net/11094/5200
citation_keywords
Titanium matrix composite
Carbon black particles
Tensile properties
Solid solution hardening
Dispersion strengthening
In-situ formed titanium carbide