Microstructural and Mechanical Properties of Ti Composite Reinforced with TiO₂ Additive Particles

Yoshimura, Tomohiro; Thotsaphon, Threrujirapapong; Imai, Hisashi; Kondoh, Katsuyoshi

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タイトル	Microstructural and Mechanical Properties of Ti Composite Reinforced with TiO₂ Additive Particles
著者	Yoshimura, Tomohiro Yoshimura, Tomohiro
	Thotsaphon, Threrujirapapong Thotsaphon, Threrujirapapong
	Imai, Hisashi Imai, Hisashi
	Kondoh, Katsuyoshi Kondoh, Katsuyoshi
キーワード等	Titanium
	Oxide dispersion strengthening
	Spark plasma sintering
	Hot extrusion
抄録	Titanium (Ti) alloys can be applied to various products in aircraft, automotive and motor cycles industries because of their weight reduction effects, superior mechanical responses and high corrosion resistance. Ti-6Al-4V (Ti64) is one of the most common Ti alloys used in structural components. It shows a high tensile strength of 900MPa or more. On the other hand, the poor elongation of about 10% is one of the disadvantages of Ti64 alloys. In addition, high cost additional elements such as vanadium and difficult melting processes increase the total material cost of Ti64. That is why its applications are limited to high-performance products. In this study, a highly strengthened pure titanium has been developed using high-purity titanium powder (HP-Ti) by elemental mixing with titanium oxide (TiO₂) powder and avoiding the melting process. The main strengthening mechanism of this material is the oxide dispersion strengthening (ODS) by elementally mixed TiO₂ in fine dispersoids. Elementally mixed powder of HP-Ti and TiO₂ was consolidated by the spark plasma sintering (SPS) process. To improve the ductility of sintered material, hot extrusion was applied to sintered HP-Ti. For example, the extruded HP-Ti mixed with 0.8wt% of TiO₂ particles indicated a high tensile strength of 863MPa and good elongation of 26.7%.
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	38
号	2
開始ページ	37
終了ページ	41
刊行年月	2009-12
ISSN	03874508
NCID	AA00867058
URL	http://hdl.handle.net/11094/6987
言語	英語

著者版フラグ	publisher
NII資源タイプ	紀要論文
ローカル資源タイプ	紀要論文
dcmi資源タイプ	text
DCTERMS.bibliographicCitation	Transactions of JWRI.38(2) P.37-P.41
DC.title	Microstructural and Mechanical Properties of Ti Composite Reinforced with TiO₂ Additive Particles
DC.creator	Yoshimura, Tomohiro
	Thotsaphon, Threrujirapapong
	Imai, Hisashi
	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	2009-12
DC.identifier" scheme="DCTERMS.URI	http://hdl.handle.net/11094/6987
DC.subject	Titanium
	Oxide dispersion strengthening
	Spark plasma sintering
	Hot extrusion
DCTERMS.abstract	Titanium (Ti) alloys can be applied to various products in aircraft, automotive and motor cycles industries because of their weight reduction effects, superior mechanical responses and high corrosion resistance. Ti-6Al-4V (Ti64) is one of the most common Ti alloys used in structural components. It shows a high tensile strength of 900MPa or more. On the other hand, the poor elongation of about 10% is one of the disadvantages of Ti64 alloys. In addition, high cost additional elements such as vanadium and difficult melting processes increase the total material cost of Ti64. That is why its applications are limited to high-performance products. In this study, a highly strengthened pure titanium has been developed using high-purity titanium powder (HP-Ti) by elemental mixing with titanium oxide (TiO₂) powder and avoiding the melting process. The main strengthening mechanism of this material is the oxide dispersion strengthening (ODS) by elementally mixed TiO₂ in fine dispersoids. Elementally mixed powder of HP-Ti and TiO₂ was consolidated by the spark plasma sintering (SPS) process. To improve the ductility of sintered material, hot extrusion was applied to sintered HP-Ti. For example, the extruded HP-Ti mixed with 0.8wt% of TiO₂ particles indicated a high tensile strength of 863MPa and good elongation of 26.7%.
citation_title	Microstructural and Mechanical Properties of Ti Composite Reinforced with TiO₂ Additive Particles
citation_author	Yoshimura, Tomohiro
	Thotsaphon, Threrujirapapong
	Imai, Hisashi
	Kondoh, Katsuyoshi
citation_publisher	大阪大学接合科学研究所
citation_language	英語
citation_date	2009-12
citation_journal_title	Transactions of JWRI
citation_volume	38
citation_issue	2
citation_firstpage	37
citation_lastpage	41
citation_issn	03874508
citation_public_url	http://hdl.handle.net/11094/6987
citation_keywords	Titanium
	Oxide dispersion strengthening
	Spark plasma sintering
	Hot extrusion

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