Concentration Dependence of Constituent Elements on Grain Boundary Migration in High-Entropy Alloys

被引：0
作者：
Kohei S. [1 ]
Tomoaki N. [2 ]
Tomotsugu S. [2 ]
机构：
[1] Division of Mechanical Science and Engineering, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa
[2] Faculty of Mechanical Engineering, Institute of Science and Engineering, Kanazawa University, Kakuma-machi, Kanazawa
来源：
Zairyo/Journal of the Society of Materials Science, Japan | 2024年 / 73卷 / 02期
基金：
日本学术振兴会;
关键词：
Grain boundary; Grain boundary migration; High-entropy alloy; Molecular dynamics; Pinning; Segregation;
D O I：
10.2472/jsms.73.101
中图分类号：
学科分类号：
摘要：
High-entropy alloys (HEAs) are multicomponent alloys composed of five or more than five elements with near equimolar concentrations. In this study, molecular dynamics (MD) simulations of grain boundary (GB) migration in HEAs were performed in order to systematically investigate the concentration dependence of the constituent elements on its migration behavior. We found that the driving force required for GB migration in the model HEAs reaches the maximum when the GB migration becomes intermittent or the velocity reduces. The maximum driving force is achieved at the maximum degree of GB segregation, showing that GB segregation, which can be controlled by the element composition in the HEAs, strongly affects the GB migration behavior such as the required force for the migration and the velocity. Our study indicates that the element composition in HEAs plays an important role in determining the GB migration behavior and the obtained results contribute to designing the HEAs with superior mechanical properties. ©2024 The Society of Materials Science, Japan.
引用
收藏
页码：101 / 108
页数：7
相关论文
共 29 条
  • [1] Gottstein G., Shvindlerman L. S., Grain boundary migration in metals (second edition), (2009)
  • [2] Cahn J. W., The impurity-drag effect in grain boundary motion, Acta Metallurgica, 10, pp. 789-798, (1962)
  • [3] Lucke K., Stuwe H. P., On the theory of impurity controlled grain boundary motion, Acta Metallurgica, 19, pp. 1087-1099, (1971)
  • [4] Koju R. K., Mishin Y., Direct atomistic modeling of solute drag by moving grain boundaries, Acta Materialia, 198, pp. 111-120, (2020)
  • [5] Yeh J.-W., Chen S.-K., Lin S.-J., Gan J.-Y., Chin T.-S., Shun T.-T., Tsau C.-H., Chang S.-Y., Nanostructured high-entropy alloys with multiple principal elements: Novel alloy design concepts and outcomes, Advanced Engineering Materials, 6, pp. 299-303, (2004)
  • [6] Cantor B., Chang I. T. H., Knight P., Vincent A. J. B., Microstructural development in equiatomic multicomponent alloys, Materials Science and Engineering A, 375-377, pp. 213-218, (2004)
  • [7] Gludovatz B., Hohenwarter A., Catoor D., Chang E. H., George E. P., Ritchie R. O., A fracture-resistant high-entropy alloy for cryogenic applications, Science, 345, pp. 1153-1158, (2014)
  • [8] Senkov O. N., Wilks G. B., Scott J. M., Miracle D. B., Mechanical properties of Nb<sub>25</sub>Mo<sub>25</sub>Ta<sub>25</sub>W<sub>25</sub> refractory high entropy alloys, Intermetallics, 19, pp. 698-706, (2011)
  • [9] Ye Y. F., Wang Q., Lu J., Liu C. T., Yang Y., High-entropy alloy: challenges and prospects, Materials Today, 19, pp. 349-362, (2016)
  • [10] Miracle D. B., Senkov O. N., A critical review of high entropy alloys and related concepts, Acta Materialia, 122, pp. 448-511, (2017)
123