Shear-coupled grain boundary migration in bicrystal Ni with metallic dopant segregation

被引：0
作者：
Jie Li
Xinhua Yang
Peng Wang
机构：
[1] Huazhong University of Science and Technology,School of Aerospace Engineering
[2] Hubei Key Laboratory of Engineering Structural Analysis and Safety Assessment,College of Engineering
[3] Huazhong Agricultural University,undefined
来源：
Journal of Materials Research | 2021年 / 36卷
关键词：
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The shear-coupled grain boundary (GB) migration in bicrystal Ni with metallic dopant segregation was investigated by the molecular dynamics simulations. Different from the approximately linear relation of the GB migration of pure bicrystal Ni with the nominal shear strain, the curve of doped bicrystal Ni can be divided into three stages. The threshold strain, saturated strain, and saturated GB migration displacement can be used to characterize them. They are considerably affected by the Cr concentration in GB, temperature, and dopant type. The higher the dopant concentration is or the lower the temperature is, the greater the resistance to GB migration is. Cu dopant induces the greatest resistance, Cr and Fe dopants have great effect on the GB migration, but Co has almost no influence. All these hindering effects can be explained from the variation of the number of pinning points induced by the dopant atoms in GB.
引用
收藏
页码：775 / 783
页数：8
相关论文
共 192 条
  • [1] Kumar KS(2003)Mechanical behavior of nanocrystalline metals and alloys The Golden Jubilee Issue—Selected topics in Materials Science and Engineering: Past, Present and Future, edited by S Suresh Acta Mater. 51 5743-undefined
  • [2] Van Swygenhoven H(2006)Mechanical properties of nanocrystalline materials Prog. Mater. Sci. 51 427-undefined
  • [3] Suresh S(2007)Toward a quantitative understanding of mechanical behavior of nanocrystalline metals Acta Mater. 55 4041-undefined
  • [4] Meyers MA(2015)Thermal stability: the next frontier for nanocrystalline materials JOM 67 2785-undefined
  • [5] Mishra A(2015)Nanocrystalline materials at equilibrium: a thermodynamic review JOM 67 2834-undefined
  • [6] Benson DJ(2016)Thermal stability of nanocrystalline materials: thermodynamics and kinetics Int. Mater. Rev. 62 303-undefined
  • [7] Dao M(2014)Grain boundary segregation engineering in metallic alloys: a pathway to the design of interfaces Curr. Opin. Solid State Mater. Sci. 18 253-undefined
  • [8] Lu L(2015)Stabilization of nanocrystalline alloys via grain boundary segregation: a diffuse interface model Acta Mater. 101 159-undefined
  • [9] Asaro R(2012)Design of stable nanocrystalline alloys Science 337 951-undefined
  • [10] Dehosson J(2007)Tailoring and patterning the grain size of nanocrystalline alloys Acta Mater. 55 371-undefined
12345678910