Ultrahigh fatigue strength in Ti-based bulk metallic glass

K. Fujita; T. Hashimoto; W. Zhang; Nobuyuki Nishiyama; C. Ma; H. Kimura; A. Inoue

Ultrahigh fatigue strength in Ti-based bulk metallic glass

K. Fujita, T. Hashimoto, W. Zhang, Nobuyuki Nishiyama, C. Ma, H. Kimura, A. Inoue

Institute for Materials Research (IMR)

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

Fatigue tests were carried out on nanocrystal dispersed Ti_41.6Zr_2.5Hf₆Cu_42.5 Ni_7.5Si₁ at.% (Ti-based), Cu₆₀ Zr₃₀Ti₁₀ at.% (CuZrTi, Cu-based), and Cu₆₀Hf_2.5Ti₁₅ at.% (CuHfTi, Cu-based) bulk metallic glasses (BMGs) under axial loading at a stress ratio of 0.1 and a frequency of 5-10 Hz. The fatigue limit (σ_w = σ_max - α_min) and fatigue ratio (σ_w/σ_B¹ α_i; tensile strength) in the Ti-based, CuZrTi and CuHfTi BMGs were 1610 MPa and 0.79, 980 MPa and 0.49, and 860 MPa and 0.40, respectively. In particular, the Ti-based BMG showed superhigh fatigue strength in comparison to the high strength crystalline alloys with high fatigue strength [e.g. Cr-Mo steel (JIS SCM435), σ_w = about 1000 MPa]. Specimen and fracture surfaces in the Ti-based BMG were observed by using FE-SEM and fatigue crack initiation mechanism was studied.

Original language	English
Pages (from-to)	137-139
Number of pages	3
Journal	Reviews on Advanced Materials Science
Volume	18
Issue number	2
Publication status	Published - 2008 Jun 1

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

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title = "Ultrahigh fatigue strength in Ti-based bulk metallic glass",

abstract = "Fatigue tests were carried out on nanocrystal dispersed Ti41.6Zr2.5Hf6Cu42.5 Ni7.5Si1 at.% (Ti-based), Cu60 Zr30Ti10 at.% (CuZrTi, Cu-based), and Cu60Hf2.5Ti15 at.% (CuHfTi, Cu-based) bulk metallic glasses (BMGs) under axial loading at a stress ratio of 0.1 and a frequency of 5-10 Hz. The fatigue limit (σw = σmax - αmin) and fatigue ratio (σw/σB1 αi; tensile strength) in the Ti-based, CuZrTi and CuHfTi BMGs were 1610 MPa and 0.79, 980 MPa and 0.49, and 860 MPa and 0.40, respectively. In particular, the Ti-based BMG showed superhigh fatigue strength in comparison to the high strength crystalline alloys with high fatigue strength [e.g. Cr-Mo steel (JIS SCM435), σw = about 1000 MPa]. Specimen and fracture surfaces in the Ti-based BMG were observed by using FE-SEM and fatigue crack initiation mechanism was studied.",

author = "K. Fujita and T. Hashimoto and W. Zhang and Nobuyuki Nishiyama and C. Ma and H. Kimura and A. Inoue",

year = "2008",

month = jun,

day = "1",

language = "English",

volume = "18",

pages = "137--139",

journal = "Reviews on Advanced Materials Science",

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publisher = "Russian Academy of Sciences",

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TY - JOUR

T1 - Ultrahigh fatigue strength in Ti-based bulk metallic glass

AU - Fujita, K.

AU - Hashimoto, T.

AU - Zhang, W.

AU - Nishiyama, Nobuyuki

AU - Ma, C.

AU - Kimura, H.

AU - Inoue, A.

PY - 2008/6/1

Y1 - 2008/6/1

N2 - Fatigue tests were carried out on nanocrystal dispersed Ti41.6Zr2.5Hf6Cu42.5 Ni7.5Si1 at.% (Ti-based), Cu60 Zr30Ti10 at.% (CuZrTi, Cu-based), and Cu60Hf2.5Ti15 at.% (CuHfTi, Cu-based) bulk metallic glasses (BMGs) under axial loading at a stress ratio of 0.1 and a frequency of 5-10 Hz. The fatigue limit (σw = σmax - αmin) and fatigue ratio (σw/σB1 αi; tensile strength) in the Ti-based, CuZrTi and CuHfTi BMGs were 1610 MPa and 0.79, 980 MPa and 0.49, and 860 MPa and 0.40, respectively. In particular, the Ti-based BMG showed superhigh fatigue strength in comparison to the high strength crystalline alloys with high fatigue strength [e.g. Cr-Mo steel (JIS SCM435), σw = about 1000 MPa]. Specimen and fracture surfaces in the Ti-based BMG were observed by using FE-SEM and fatigue crack initiation mechanism was studied.

AB - Fatigue tests were carried out on nanocrystal dispersed Ti41.6Zr2.5Hf6Cu42.5 Ni7.5Si1 at.% (Ti-based), Cu60 Zr30Ti10 at.% (CuZrTi, Cu-based), and Cu60Hf2.5Ti15 at.% (CuHfTi, Cu-based) bulk metallic glasses (BMGs) under axial loading at a stress ratio of 0.1 and a frequency of 5-10 Hz. The fatigue limit (σw = σmax - αmin) and fatigue ratio (σw/σB1 αi; tensile strength) in the Ti-based, CuZrTi and CuHfTi BMGs were 1610 MPa and 0.79, 980 MPa and 0.49, and 860 MPa and 0.40, respectively. In particular, the Ti-based BMG showed superhigh fatigue strength in comparison to the high strength crystalline alloys with high fatigue strength [e.g. Cr-Mo steel (JIS SCM435), σw = about 1000 MPa]. Specimen and fracture surfaces in the Ti-based BMG were observed by using FE-SEM and fatigue crack initiation mechanism was studied.

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