Excellent Mechanical Properties of Cu-Hf-Ti-Ta Bulk Glassy Alloys Containing In-Situ Dendrite Ta-based BCC Phase
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- 資料種別
- 記事
- 著者・編者
- Chunling QinWei ZhangHisamichi Kimura 他
- タイトル（掲載誌）
- Materials transactions
- 巻号年月日等（掲載誌）
- 45(9) 2004.9
- 掲載巻
- 45
- 掲載号
- 9
- 掲載ページ
- 2936～2940
- 掲載年月日（W3CDTF）
- 2004-09
- ISSN（掲載誌）
- 1345-9678
- ISSN-L（掲載誌）
- 1345-9678
- 出版事項（掲載誌）
- Sendai : The Japan Institute of Metals and Materials ; 2001-
- 出版地（国名コード）
- JP
- 本文の言語コード
- eng
- 件名標目
- NDLC
- 対象利用者
- 一般
- 所蔵機関
- 国立国会図書館
- 請求記号
- Z53-J286
- 連携機関・データベース
- 国立国会図書館 : 国立国会図書館雑誌記事索引
- 書誌ID（NDLBibID）
- 7088335
- 整理区分コード
- 632
- 要約等
- A glassy phase containing high volume fractions (<i>V</i><SUB>f</SUB>) of bcc Ta-based phase was formed in as-cast (Cu<SUB>0.6</SUB>Hf<SUB>0.25</SUB>Ti<SUB>0.15</SUB>)<SUB>94</SUB>Ta<SUB>6</SUB> alloy rods with diameters up to 2 mm. Its <i>V</i><SUB>f</SUB> increased from 9.5 to 11% with increasing rod diameter from 1 to 2 mm. The <i>in-situ</i> bcc phase has a dendritic morphology with a size of about 10 μm and its size tends to increase with increasing <i>V</i><SUB>f</SUB>. The bcc phase has analytical compositions of 1.4 at% Cu, 7.6 at% Ti and 91.0 at% Ta. The lattice parameter of the bcc phase is 3.306 nm which approximates to that of Ta metal. The thermal stability of the remaining glassy matrix remains unchanged in coexistence with the bcc phase. The mixed structure is presumed to be formed by the primary precipitation of ductile dendritic bcc phase, followed by the solidification of the remaining liquid to glassy phase. The Young's modulus (<i>E</i>), yield strength (σ<SUB>y</SUB>), true compressive fracture strength (σ<SUB>t,f</SUB>) and true plastic strain (ε<SUB>p</SUB>) were 104 GPa, 2125 MPa, 2100 MPa and 0.34, respectively, for the φ2 mm rod with 11% <i>V</i><SUB>f</SUB>. The σ<SUB>y</SUB> and σ<SUB>t,f</SUB> are higher than those (2010 MPa and 2005 MPa) for the Cu<SUB>60</SUB>Hf<SUB>25</SUB>Ti<SUB>15</SUB> glassy alloy rod with a diameter of 2 mm. Especially, the ε<SUB>p</SUB> for the (Cu<SUB>0.6</SUB>Hf<SUB>0.25</SUB>Ti<SUB>0.15</SUB>)<SUB>94</SUB>Ta<SUB>6</SUB> mixed structure alloy is dramatically enhanced in comparison with that (ε<SUB>p</SUB> = 0.016) for Cu<SUB>60</SUB>Hf<SUB>25</SUB>Ti<SUB>15</SUB> single phase alloy. The enhancement of σ<SUB>y</SUB>, σ<SUB>t,f</SUB> and ε<SUB>p</SUB> in the mixed structure of glassy and bcc phase for the new Cu-based system is promising for future uses as a new type of high-strength bulk glassy alloy.
- DOI
- 10.2320/matertrans.45.2936
- オンライン閲覧公開範囲
- インターネット公開
- 連携機関・データベース
- 科学技術振興機構 : J-STAGE
- 要約等
- A glassy phase containing high volume fractions (<i>V</i><SUB>f</SUB>) of bcc Ta-based phase was formed in as-cast (Cu<SUB>0.6</SUB>Hf<SUB>0.25</SUB>Ti<SUB>0.15</SUB>)<SUB>94</SUB>Ta<SUB>6</SUB> alloy rods with diameters up to 2 mm. Its <i>V</i><SUB>f</SUB> increased from 9.5 to 11% with increasing rod diameter from 1 to 2 mm. The <i>in-situ</i> bcc phase has a dendritic morphology with a size of about 10 μm and its size tends to increase with increasing <i>V</i><SUB>f</SUB>. The bcc phase has analytical compositions of 1.4 at% Cu, 7.6 at% Ti and 91.0 at% Ta. The lattice parameter of the bcc phase is 3.306 nm which approximates to that of Ta metal. The thermal stability of the remaining glassy matrix remains unchanged in coexistence with the bcc phase. The mixed structure is presumed to be formed by the primary precipitation of ductile dendritic bcc phase, followed by the solidification of the remaining liquid to glassy phase. The Young's modulus (<i>E</i>), yield strength (σ<SUB>y</SUB>), true compressive fracture strength (σ<SUB>t,f</SUB>) and true plastic strain (ε<SUB>p</SUB>) were 104 GPa, 2125 MPa, 2100 MPa and 0.34, respectively, for the φ2 mm rod with 11% <i>V</i><SUB>f</SUB>. The σ<SUB>y</SUB> and σ<SUB>t,f</SUB> are higher than those (2010 MPa and 2005 MPa) for the Cu<SUB>60</SUB>Hf<SUB>25</SUB>Ti<SUB>15</SUB> glassy alloy rod with a diameter of 2 mm. Especially, the ε<SUB>p</SUB> for the (Cu<SUB>0.6</SUB>Hf<SUB>0.25</SUB>Ti<SUB>0.15</SUB>)<SUB>94</SUB>Ta<SUB>6</SUB> mixed structure alloy is dramatically enhanced in comparison with that (ε<SUB>p</SUB> = 0.016) for Cu<SUB>60</SUB>Hf<SUB>25</SUB>Ti<SUB>15</SUB> single phase alloy. The enhancement of σ<SUB>y</SUB>, σ<SUB>t,f</SUB> and ε<SUB>p</SUB> in the mixed structure of glassy and bcc phase for the new Cu-based system is promising for future uses as a new type of high-strength bulk glassy alloy.
- DOI
- 10.2320/matertrans.45.2936
- オンライン閲覧公開範囲
- インターネット公開
- 関連情報（URI）
- 参照
- Retraction:Nanoindentation Characteristics of <I>In-Situ</I> Formed Cu–Hf–Ti–Ag–Ta Bulk Metallic Glass CompositesUnusual Plasticity of the Particulate-Reinforced Cu-Zr-Based Bulk Metallic Glass CompositesMicrostructure and Mechanical Properties of (Zr<SUB>0.5</SUB>Cu<SUB>0.4</SUB>Al<SUB>0.1</SUB>)<SUB>100−<I>x</I></SUB>Ta<I><SUB>x</SUB></I> Bulk Metallic Glass CompositesHigh Specific Strength and Improved Ductility of Bulk (Mg<SUB>0.65</SUB>Cu<SUB>0.25</SUB>Gd<SUB>0.1</SUB>)<SUB>100−<I>x</I></SUB>Ti<I><SUB>x</SUB></I> Metallic Glass CompositesDevelopments and Applications of Bulk Glassy Alloys in Late Transition Metal Base System
- 参照
- Formation and mechanical properties of Cu-Hf-Ti bulk glassy alloysBulk Amorphous AlloysNew Amorphous Mg-Ce-Ni Alloys with High Strength and Good DuctilityA microscopic mechanism for steady state inhomogeneous flow in metallic glassesHigh-strength Cu-based bulk glassy alloys in Cu–Zr–Ti and Cu–Hf–Ti ternary systemsMechanical properties of tungsten and steel fiber reinforced Zr41.25Ti13.75Cu12.5Ni10Be22.5 metallic glass matrix compositesPlastic deformation in metallic glassesMechanical properties of Zr<sub>57</sub>Nb<sub>5</sub>Al<sub>10</sub>Cu<sub>15.4</sub>Ni<sub>12.6</sub> metallic glass matrix particulate compositesTi-based amorphous alloys with a wide supercooled liquid regionStabilization of metallic supercooled liquid and bulk amorphous alloysMicrostructure Controlled Shear Band Pattern Formation and Enhanced Plasticity of Bulk Metallic Glasses Containing<i>in situ</i>Formed Ductile Phase Dendrite DispersionsA highly processable metallic glass: Zr41.2Ti13.8Cu12.5Ni10.0Be22.5Amorphous (Ti,Zr, Hf)NiCu ternary alloys with a wide supercooled liquid regionHigh strength bulk amorphous alloys with low critical cooling ratesEffect of Additional Elements on Glass Transition Behavior and Glass Formation Tendency of Zr–Al–Cu–Ni AlloysPreparation and Thermal Stability of Bulk Amorphous Pd40Cu30Ni10P20 Alloy Cylinder of 72mm in DiameterFe-Based Ferromagnetic Glassy Alloys with Wide Supercooled Liquid RegionPreparation of bulk glassy Pd40Cu30Ni10P20 alloy of 40 mm in diameter by water quenchingThermal Stability and Soft Magnetic Properties of Co–Fe–M–B (M=Nb, Zr) Amorphous Alloys with Large Supercooled Liquid RegionFlux Treated Pd–Cu–Ni–P Amorphous Alloy Having Low Critical Cooling RateNew Bulk Glassy Ni-Based Alloys with High Strength of 3000 MPaBulk Amorphous Co–Ni-Based Alloys with a Large Supercooled Liquid RegionAl–La–Ni Amorphous Alloys with a Wide Supercooled Liquid RegionSynthesis and Mechanical Properties of Zr55Al10Ni5Cu30 Bulk Glass Composites Containing ZrC Particles Formed by the In-Situ ReactionThermal and Mechanical Properties of Cu-Based Cu-Zr-Ti Bulk Glassy AlloysFormation of Ductile Cu-Based Bulk Metallic Glass Matrix Composite by Ta AdditionZr–Al–Ni Amorphous Alloys with High Glass Transition Temperature and Significant Supercooled Liquid RegionIn situ Formed (Cu0.6Zr0.25Ti0.15)93Nb7 Bulk Metallic Glass Composites
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- 国立情報学研究所 : CiNii Research
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- 書誌ID（NDLBibID）
- 7088335
- NII論文ID
- 1300044525923001885114410013580157