Effect of Mn addition on the formation of vacancy-type dislocation loops in α-Fe

Ranran Li, Luwei Xue, Hideo Watanabe, Xiaoou Yi, Wentuo Han, Pingping Liu, Qian Zhan, Farong Wan

研究成果: ジャーナルへの寄稿学術誌査読

抄録

It has recently been established that vacancy loops of ~100 nm in maximum size could form in hydrogen pre-implanted α-Fe (Huang et al. Fusion Eng. Des., 2010). The formation temperature of these large loops is composition dependent, varying from ~500 °C in α-Fe, to ~450 °C in Fe[sbnd]Ni and ~ 620 °C in Fe[sbnd]Cr (Wan et al. J. Nucl. Mater., 2014; Du et al. Acta Metall. Sin., 2019). In this work, the effect of Mn addition upon vacancy loop formation has been investigated. Pure Fe and Fe-1.4 wt% Mn alloy specimens were irradiated with 30 keV H+ ions at room temperature. Radiation-induced loop production, size, population and nature were characterized based on diffraction contrast imaging using a combination of 1 MV high voltage electron microscope (HVEM) and 200 kV conventional transmission electron microscope (CTEM). Results of observation indicate that Mn addition gives rise to the increase of vacancy loop formation temperature in α-Fe, similar to the effect of Cr. A new criterion has been thus proposed, to classify the common alloying elements (Cr, Ni, Mn etc) found in Fe.

本文言語英語
論文番号111755
ジャーナルMaterials Characterization
185
DOI
出版ステータス出版済み - 3月 2022

!!!All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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