Effect of oxygen on yield stress and slip plane in Nb, Nb-Ta and Nb-Mo single crystal

Eri Miura; Kyosuke Yoshimi; Shuji Hanada

doi:10.2320/matertrans1989.40.365

Effect of oxygen on yield stress and slip plane in Nb, Nb-Ta and Nb-Mo single crystal

Eri Miura, Kyosuke Yoshimi, Shuji Hanada

ENG - Materials Science

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

4 Citations (Scopus)

Abstract

Effects of oxygen (O) on orientation dependence of critical resolved shear stress (c.r.s.s.) and of active slip plane in Nb, Nb-20Ta and Nb-20Mo single crystals were investigated by compression tests at 298 and 973 K. c.r.s.s. is remarkably increased by O addition. At 298 K, coarse wavy slip lines evidencing macroscopic cross slip are observed in the low O content alloy, while fine straight slip lines are observed in the high O content alloy. Observed slip planes of O-doped Nb and Nb alloys correspond nearly to maximum resolved shear stress planes (m.r.s.s.p.). Orientation dependence of c.r.s.s. is emphasized by O addition in Nb-20Ta at 298 K and in Nb-20Mo at 973 K. From these results, interaction between O atoms and screw dislocations is discussed.

Original language	English
Pages (from-to)	365-368
Number of pages	4
Journal	Materials Transactions, JIM
Volume	40
Issue number	5
DOIs	https://doi.org/10.2320/matertrans1989.40.365
Publication status	Published - 1999 May

Keywords

Critical resolved shear stress
Niobium
Niobium-molybdenum alloy
Niobium-tantalum alloy
Orientation dependence
Oxygen

ASJC Scopus subject areas

Engineering(all)

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10.2320/matertrans1989.40.365

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title = "Effect of oxygen on yield stress and slip plane in Nb, Nb-Ta and Nb-Mo single crystal",

abstract = "Effects of oxygen (O) on orientation dependence of critical resolved shear stress (c.r.s.s.) and of active slip plane in Nb, Nb-20Ta and Nb-20Mo single crystals were investigated by compression tests at 298 and 973 K. c.r.s.s. is remarkably increased by O addition. At 298 K, coarse wavy slip lines evidencing macroscopic cross slip are observed in the low O content alloy, while fine straight slip lines are observed in the high O content alloy. Observed slip planes of O-doped Nb and Nb alloys correspond nearly to maximum resolved shear stress planes (m.r.s.s.p.). Orientation dependence of c.r.s.s. is emphasized by O addition in Nb-20Ta at 298 K and in Nb-20Mo at 973 K. From these results, interaction between O atoms and screw dislocations is discussed.",

keywords = "Critical resolved shear stress, Niobium, Niobium-molybdenum alloy, Niobium-tantalum alloy, Orientation dependence, Oxygen",

author = "Eri Miura and Kyosuke Yoshimi and Shuji Hanada",

year = "1999",

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doi = "10.2320/matertrans1989.40.365",

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TY - JOUR

T1 - Effect of oxygen on yield stress and slip plane in Nb, Nb-Ta and Nb-Mo single crystal

AU - Miura, Eri

AU - Yoshimi, Kyosuke

AU - Hanada, Shuji

PY - 1999/5

Y1 - 1999/5

N2 - Effects of oxygen (O) on orientation dependence of critical resolved shear stress (c.r.s.s.) and of active slip plane in Nb, Nb-20Ta and Nb-20Mo single crystals were investigated by compression tests at 298 and 973 K. c.r.s.s. is remarkably increased by O addition. At 298 K, coarse wavy slip lines evidencing macroscopic cross slip are observed in the low O content alloy, while fine straight slip lines are observed in the high O content alloy. Observed slip planes of O-doped Nb and Nb alloys correspond nearly to maximum resolved shear stress planes (m.r.s.s.p.). Orientation dependence of c.r.s.s. is emphasized by O addition in Nb-20Ta at 298 K and in Nb-20Mo at 973 K. From these results, interaction between O atoms and screw dislocations is discussed.

AB - Effects of oxygen (O) on orientation dependence of critical resolved shear stress (c.r.s.s.) and of active slip plane in Nb, Nb-20Ta and Nb-20Mo single crystals were investigated by compression tests at 298 and 973 K. c.r.s.s. is remarkably increased by O addition. At 298 K, coarse wavy slip lines evidencing macroscopic cross slip are observed in the low O content alloy, while fine straight slip lines are observed in the high O content alloy. Observed slip planes of O-doped Nb and Nb alloys correspond nearly to maximum resolved shear stress planes (m.r.s.s.p.). Orientation dependence of c.r.s.s. is emphasized by O addition in Nb-20Ta at 298 K and in Nb-20Mo at 973 K. From these results, interaction between O atoms and screw dislocations is discussed.

KW - Critical resolved shear stress

KW - Niobium

KW - Niobium-molybdenum alloy

KW - Niobium-tantalum alloy

KW - Orientation dependence

KW - Oxygen

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DO - 10.2320/matertrans1989.40.365

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JO - Materials Transactions

JF - Materials Transactions

SN - 1345-9678

IS - 5

ER -

Effect of oxygen on yield stress and slip plane in Nb, Nb-Ta and Nb-Mo single crystal

Abstract

Keywords

ASJC Scopus subject areas

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