Influence of unique layered microstructure on fatigue properties of Ti-48Al-2Cr-2Nb alloys fabricated by electron beam melting

Cho, Ken; Kobayashi, Ryota; Oh, Jong Yeong; Yasuda, Hiroyuki Y.; Todai, Mitsuharu; Nakano, Takayoshi; Ikeda, Ayako; Ueda, Minoru; Takeyama, Masao

doi:https://doi.org/10.1016/j.intermet.2018.01.009

Influence of unique layered microstructure on fatigue properties of Ti-48Al-2Cr-2Nb alloys fabricated by electron beam melting

Cho, Ken; Kobayashi, Ryota; Oh, Jong Yeong et al.

Intermetallics, 2018, 95, 1-10

アクセス数:243件（2025-04-03 22:18 集計）

固定URL: https://hdl.handle.net/11094/89903

閲覧可能ファイル

ファイル	フォーマット	利用条件	サイズ	閲覧回数	利用開始日	説明	information
Intermet_95_1	pdf	なし	4.38 MB	71	2023.01.12

Creative Commons : 表示 - 非営利 - 改変禁止

論文情報

ファイル出力 EndNote Basic出力 Mendeley出力

タイトル	Influence of unique layered microstructure on fatigue properties of Ti-48Al-2Cr-2Nb alloys fabricated by electron beam melting
著者	NRID 1000000633661 1000000633661 researchmap permalink choken choken Scopus Author ID 55535308400 55535308400 著者名 Cho, Ken
	著者名 Kobayashi, Ryota
	著者名 Oh, Jong Yeong
	NRID 1000060294021 1000060294021 ORCID 0000-0002-7077-0655 0000-0002-7077-0655 researchmap permalink read0051691 read0051691 Scopus Author ID 47861549600 47861549600 著者名 Yasuda, Hiroyuki Y.
	NRID 1000010610800 1000010610800 著者名 Todai, Mitsuharu
	NRID 1000030243182 1000030243182 ORCID 0000-0001-8052-1698 0000-0001-8052-1698 researchmap permalink read0013987 read0013987 Scopus Author ID 7403896013 7403896013 著者名 Nakano, Takayoshi
	NRID 1000040746666 1000040746666 著者名 Ikeda, Ayako
	著者名 Ueda, Minoru
	NRID 1000030251622 1000030251622 著者名 Takeyama, Masao
キーワード等	A. Intermetallics (aluminides)
	B. Fatigue resistance and crack growth
	D. Microstructure
	G. Aero–engine components
内容	Cho K., Kobayashi R., Oh J.Y., et al. Influence of unique layered microstructure on fatigue properties of Ti-48Al-2Cr-2Nb alloys fabricated by electron beam melting. Intermetallics 95, 1 (2018); https://doi.org/https://doi.org/10.1016/j.intermet.2018.01.009.
抄録	The influence of a unique layered microstructure consisting of duplex-like region and equiaxed γ grain layers (γ bands) on the fatigue properties of Ti-48Al-2Cr-2Nb alloy bars fabricated by electron beam melting (EBM) was investigated at room temperature (RT) and 1023 K focusing on the angle (θ) between the building direction and cylinder (loading) axis. We found for the first time the fatigue strengths of the alloy bars with the layered microstructure depend strongly on the angle θ. Particularly, the fatigue strength of the alloy bars fabricated at θ = 45° is comparable to that of the hot isostatic pressing (HIP) treated cast alloys, even without HIP treatment. We also found the alloy bars fabricated at θ = 0° and 45° exhibit high fatigue strengths in the low-cycle fatigue life region at 1023 K similar to θ = 45° alloy bars at RT. These high fatigue strengths are caused by inhibition of the brittle main crack initiation by stress relaxation due to shear deformation at the γ bands and large plasticity of the alloys. These findings indicate that the alloys fabricated by EBM at θ = 45° with the unique layered microstructure have a great potential for aerospace and automobile applications.
出版者	Elsevier
収録物名	Intermetallics
巻(号)	95
ページ	1-10
刊行年月	2018-04-01
言語	英語
ハンドルURL	https://hdl.handle.net/11094/89903
PISSN	09669795
NCID	AA10947696
関連情報 (isVersionOf)	DOI (出版社版) https://doi.org/10.1016/j.intermet.2018.01.009
アクセス権	open access
権利情報	©2018. This manuscript version is made available under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
出版タイプ	Accepted Manuscript
カテゴリ	学術雑誌論文 Journal Article

資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
DCMI資源タイプ	text
DCTERMS.bibliographicCitation	Intermetallics. 2018, 95, p. 1-10
DC.title	Influence of unique layered microstructure on fatigue properties of Ti-48Al-2Cr-2Nb alloys fabricated by electron beam melting
DC.creator	Cho, Ken
	Kobayashi, Ryota
	Oh, Jong Yeong
	Yasuda, Hiroyuki Y.
	Todai, Mitsuharu
	Nakano, Takayoshi
	Ikeda, Ayako
	Ueda, Minoru
	Takeyama, Masao
DC.publisher	Elsevier
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2018-04-01
DC.identifier	https://doi.org/10.1016/j.intermet.2018.01.009
DC.subject	A. Intermetallics (aluminides)
	B. Fatigue resistance and crack growth
	D. Microstructure
	G. Aero–engine components
DC.description	Cho K., Kobayashi R., Oh J.Y., et al. Influence of unique layered microstructure on fatigue properties of Ti-48Al-2Cr-2Nb alloys fabricated by electron beam melting. Intermetallics 95, 1 (2018); https://doi.org/https://doi.org/10.1016/j.intermet.2018.01.009.
DCTERMS.abstract	The influence of a unique layered microstructure consisting of duplex-like region and equiaxed γ grain layers (γ bands) on the fatigue properties of Ti-48Al-2Cr-2Nb alloy bars fabricated by electron beam melting (EBM) was investigated at room temperature (RT) and 1023 K focusing on the angle (θ) between the building direction and cylinder (loading) axis. We found for the first time the fatigue strengths of the alloy bars with the layered microstructure depend strongly on the angle θ. Particularly, the fatigue strength of the alloy bars fabricated at θ = 45° is comparable to that of the hot isostatic pressing (HIP) treated cast alloys, even without HIP treatment. We also found the alloy bars fabricated at θ = 0° and 45° exhibit high fatigue strengths in the low-cycle fatigue life region at 1023 K similar to θ = 45° alloy bars at RT. These high fatigue strengths are caused by inhibition of the brittle main crack initiation by stress relaxation due to shear deformation at the γ bands and large plasticity of the alloys. These findings indicate that the alloys fabricated by EBM at θ = 45° with the unique layered microstructure have a great potential for aerospace and automobile applications.
DC.rights	©2018. This manuscript version is made available under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
DC.format	89903
citation_title	Influence of unique layered microstructure on fatigue properties of Ti-48Al-2Cr-2Nb alloys fabricated by electron beam melting
citation_author	Cho, Ken
	Kobayashi, Ryota
	Oh, Jong Yeong
	Yasuda, Hiroyuki Y.
	Todai, Mitsuharu
	Nakano, Takayoshi
	Ikeda, Ayako
	Ueda, Minoru
	Takeyama, Masao
citation_publisher	Elsevier
citation_language	英語
citation_date	2018-04-01
citation_journal_title	Intermetallics
citation_volume	95
citation_firstpage	1
citation_lastpage	10
citation_doi	https://doi.org/10.1016/j.intermet.2018.01.009
citation_public_url	https://hdl.handle.net/11094/89903

Influence of unique layered microstructure on fatigue properties of Ti-48Al-2Cr-2Nb alloys fabricated by electron beam melting

閲覧可能ファイル

論文情報

論文詳細を表示