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Effect of electronic energy dissipation on strain relaxation in irradiated concentrated solid solution alloys
Current Opinion in Solid State & Materials Science ( IF 11.0 ) Pub Date : 2019-03-06 , DOI: 10.1016/j.cossms.2019.02.002
Neila Sellami , Aurélien Debelle , Mohammad W. Ullah , Hans M. Christen , Jong K. Keum , Hongbin Bei , Haizhou Xue , William J. Weber , Yanwen Zhang

The effect of energy deposition by energetic particles on Ni and two single-phase concentrated solid solution alloys (NiFe and NiCoCrFe) is investigated through combined experimental and modelling efforts. Damage evolution as a function of increasing ion fluence is monitored via elastic strain developed in the irradiated crystals. We show that damage produced from displacement collision cascades is sensitive to subsequent highly ionizing irradiation that the strain generated by elastic nuclear collisions undergoes partial relaxation upon high-energy irradiation. This finding indicates a change in the damage structure upon electronic energy deposition due to both predominant defect annealing and growth of small defect clusters. Strain relaxation, more pronounced in the alloys than in Ni, is ascribed to both higher thermal conductivity and weaker electron-phonon coupling in Ni.



中文翻译:

电子能量耗散对辐照浓固溶合金中应变松弛的影响

通过结合实验和建模工作,研究了高能粒子对镍和两种单相浓固溶合金(NiFe和NiCoCrFe)的能量沉积影响。通过离子辐照度的增加,通过演化出的弹性应变来监测损伤的演化。我们表明位移碰撞级联产生的损伤对随后的高电离辐射很敏感,该高电离辐射是由弹性核碰撞产生的应变在高能辐照下发生部分弛豫。这一发现表明,由于主要的缺陷退火和小缺陷簇的生长,电子能量沉积后的损伤结构发生了变化。合金中的应变弛豫比镍中更为明显,

更新日期:2019-03-06
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