Mechanism of dynamic strain aging and characterization of its effect on the low-cycle fatigue behavior in type 316L stainless steel

Low-cycle fatigue tests were carried out in air in a wide temperature range from 20 to 650 degrees C with strain rates of 3.2 x 10(-5)-1 x 10(-2) s(-1) for type 316L stainless steel to investigate dynamic strain aging (DSA) effect on the fatigue resistance. The regime of DSA was evaluated using the anomalies associated with DSA and was in the temperature range of 250-550 degrees C at a strain rate of 1 x 10(-4) s(-1), in 250-600 degrees C at 1 x 10(-3) s(-1), and in 250-650 degrees C at 1 x 10(-2) s(-1). The activation energies for each type of serration were about 0.57-0.74 times those for lattice diffusion indicating that a mechanism other than lattice diffusion is involved. It seems to be reasonable to infer that DSA is caused by the pipe diffusion of solute atoms through the dislocation core. Dynamic strain aging reduced the crack initiation and propagation life by way of multiple crack initiation, which comes from the DSA-induced inhomogeneity of deformation, and rapid crack propagation due to the DSA-induced hardening, respectively. (c) 2005 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2005-04
Language
ENG
Keywords

CRACK-PROPAGATION; SERRATED FLOW; JERKY-FLOW; IRON; TEMPERATURE; STRESS; MODEL

Citation

JOURNAL OF NUCLEAR MATERIALS, v.340, no.2-3, pp.307 - 314

ISSN
0022-3115
DOI
10.1016/j.jnucmat.2004.12.012
URI
http://hdl.handle.net/10203/2921
Appears in Collection
ME-Journal Papers(저널논문)
  • Hit : 418
  • Download : 25
  • Cited 0 times in thomson ci
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡClick to seewebofscience_button
⊙ Cited 52 items in WoSClick to see citing articles inrecords_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0