| The static and cyclic creep mechanism and behaviour of AISI 316 stainless steel have been investigated under the condition of constant and square wave stress cycling tension creep test in the temperature, stress and frequency range of 650-710℃ (0.55∼0.59 Tm), 21∼29 ㎏/㎜² (206 ∼ 285 MPa), and 3 cps, respectively. Also, the relationship between static and cyclic creep have been investigated The experimental result are follows ; The cyclic creep retardation is due to the interaction of solute atom and mobile dislocation Stress rised by dynamic strain aging was observed at high temperature tensile test. The stress exponent value for static and cyclic creep was observed to be about 5.8∼7.6 and 7.9∼7.3, respectively. The activation energy for static and cyclic creep deformation was 98.1∼92.0 and 102∼97.4 ㎉ mole, respectively. The metallographic examination of static and cyclic crept specimen have shown that the fracture type was mainly intergranular. |
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