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
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
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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U2 - 10.2320/matertrans1989.40.365
DO - 10.2320/matertrans1989.40.365
M3 - Article
AN - SCOPUS:0032623524
VL - 40
SP - 365
EP - 368
JO - Materials Transactions
JF - Materials Transactions
SN - 1345-9678
IS - 5
ER -