論文

査読有り
2019年9月15日

Screw dislocation–spherical void interactions in fcc metals and their dependence on stacking fault energy

Journal of Materials Science
  • Sho Hayakawa
  • ,
  • Kohei Doihara
  • ,
  • Taira Okita
  • ,
  • Mitsuhiro Itakura
  • ,
  • Masaatsu Aichi
  • ,
  • Katsuyuki Suzuki

54
17
開始ページ
11509
終了ページ
11525
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.1007/s10853-019-03716-0

We performed molecular dynamics simulations to evaluate the effects of stacking fault energy (SFE) on interactions between a screw dislocation and spherical voids in face-centered cubic (fcc) metals. It was observed that the frequency of the cross-slips is a critical factor affecting the interaction, with primarily three different interaction morphologies being observed: (1) the two partial dislocations detach from the void independently with a time lag, (2) the two partial dislocations detach from the void almost simultaneously on a single slip plane, and (3) the two partial dislocations detach from the void almost simultaneously while involving more than one cross-slip and a jog formation. The magnitude of the critical resolved shear stress (CRSS) increases in the order mentioned above. The CRSS values for interaction morphology (2), which was observed most frequently in this study, were in good agreement with those predicted analytically by adjusting the parameters dependent on the SFE. Based on the obtained results, we discussed the applicability of the analytical model for void hardening in fcc metals. The results of this work contribute significantly to the modeling of mechanical property degradation in irradiated metals.

リンク情報
DOI
https://doi.org/10.1007/s10853-019-03716-0
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85066788481&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85066788481&origin=inward
ID情報
  • DOI : 10.1007/s10853-019-03716-0
  • ISSN : 0022-2461
  • eISSN : 1573-4803
  • ORCIDのPut Code : 73948048
  • SCOPUS ID : 85066788481

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