Influence of rhenium-decorated dislocation loops on edge dislocation gliding in tungsten

被引:9
作者
Yang, Tian-Ren [1 ,2 ]
Li, Yu-Hao [1 ,2 ]
Ren, Qing-Yuan [1 ,2 ]
Terentyev, Dmitry [3 ]
Xie, Hong-Xian [4 ]
Gao, Ning [5 ,6 ]
Zhou, Hong-Bo [1 ,2 ]
Gao, Fei [7 ]
Lu, Guang-Hong [1 ,2 ]
机构
[1] Beihang Univ, Dept Phys, Beijing 100191, Peoples R China
[2] Beihang Univ, Beijing Key Lab Adv Nucl Mat & Phys, Beijing 100191, Peoples R China
[3] Belgium Nucl Res Ctr, NMS Unit, Boeretang 200, B-2400 Mol, Belgium
[4] Hebei Univ Technol, Sch Mech Engn, Tianjin 300132, Peoples R China
[5] Shandong Univ, Inst Frontier & Interdisciplinary Sci, Qingdao 266237, Peoples R China
[6] Shandong Univ, Key Lab Particle Phys & Particle Irradiat MOE, Qingdao 266237, Peoples R China
[7] Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA
关键词
Re aggregation; Dislocation loop; Irradiation hardening; Edge dislocation glide; Critical resolved shear stress; ATOM-PROBE TOMOGRAPHY; NEUTRON-IRRADIATION; ION-IRRADIATION; MICROSTRUCTURAL DEVELOPMENT; W-RE; ALLOYS; PRECIPITATION; SEGREGATION; DEFECTS;
D O I
10.1016/j.scriptamat.2023.115624
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Rhenium (Re), as a typical alloying and transmutation element in tungsten (W), can significantly enhance the irradiation hardening, but its underlying mechanism remains to be elucidated due to the complicated Re-defect interactions. Here, using molecular dynamics simulations, we demonstrate that Re aggregation on dislocation loops have effect on the interaction with edge dislocations. Especially for the "parallel loop" case, Re-decorated loops become the strong obstacles for edge dislocation gliding from weak ones of pure loops or Re-rich clusters. Such synergetic pinning effect is dependent on the Re concentration and it modifies the complexes turning to strong obstacles once Re exceeds a certain critical concentration. This is originated from the coupling of Re with dislocation loops in W, which impedes the glide of edge dislocations and contributes greatly to the irradiation hardening. Our results give a new insight to rationalize and account for the irradiation hardening in W-Re systems.
引用
收藏
页数:6
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