TY - JOUR
T1 - Effect of Mn addition on the formation of vacancy-type dislocation loops in α-Fe
AU - Li, Ranran
AU - Xue, Luwei
AU - Watanabe, Hideo
AU - Yi, Xiaoou
AU - Han, Wentuo
AU - Liu, Pingping
AU - Zhan, Qian
AU - Wan, Farong
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China via grant No. 11875085 . Ranran Li acknowledges funding support from the China Scholarship Council (CSC, No. 201806460050 ) for a two-year joint PhD studentship between the University of Science and Technology Beijing (China) and Kyushu University (Japan). All authors gratefully acknowledge the High-Voltage Electron Microscope Laboratory at Kyushu University (Japan) and Korea Basic Science Institute (Korea) for support in HVEM machine time.
Funding Information:
This work was supported by the National Natural Science Foundation of China via grant No.11875085. Ranran Li acknowledges funding support from the China Scholarship Council (CSC, No.201806460050) for a two-year joint PhD studentship between the University of Science and Technology Beijing (China) and Kyushu University (Japan). All authors gratefully acknowledge the High-Voltage Electron Microscope Laboratory at Kyushu University (Japan) and Korea Basic Science Institute (Korea) for support in HVEM machine time.
Publisher Copyright:
© 2022 Elsevier Inc.
PY - 2022/3
Y1 - 2022/3
N2 - 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.
AB - 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.
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U2 - 10.1016/j.matchar.2022.111755
DO - 10.1016/j.matchar.2022.111755
M3 - Article
AN - SCOPUS:85123732480
SN - 1044-5803
VL - 185
JO - Materials Characterization
JF - Materials Characterization
M1 - 111755
ER -