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Creep behavior of the Zr-1.5Nb-0.4Sn-0.1Fe-0.1Cu alloy sheet is investigated from 300℃to 400℃in the stress range from 50 MPa to 180 MPa along the rolling direction.The measured strain rates range from 8.8×10~(-10)s~(-1)to 4.7×10~(-7)s~(-1).The activation energies are estimated to assess the creep deformation mechanisms in this alloy.The strain rate is slightly different at low stress,while it shows a distinct difference at high stresses.Stress exponents of this alloy increase with increasing applied stress at all testing temperatures.It is concluded that the creep deformation of the Zr-1.5Nb-0.4Sn-0.1Fe-0.1Cu alloy is controlled by the diffusion creep at low stress region and by the climbing of dislocations at high stress region.
Creep behavior of the Zr-1.5Nb-0.4Sn-0.1Fe-0.1Cu alloy sheet was investigated from 300 ° C to 400 ° C in the stress range from 50 MPa to 180 MPa along the rolling direction. The measured strain rates ranged from 8.8 × 10 ~ (-10) s ~ (-1) to 4.7 × 10 ~ (-7) s ~ (-1) .The activation energies are estimated to assess the creep deformation mechanisms in this alloy.The strain rate is slightly different at low stress, while it shows a distinct difference at high stresses. Stress exponents of this alloy increase with increasing applied stress at all testing temperatures. It is concluded that the creep deformation of the Zr-1.5Nb-0.4Sn-0.1Fe-0.1Cu alloy is controlled by the diffusion creep at low stress region and by the climbing of dislocations at high stress region.