Dislocations And Twins In Nanocrystalline Ni After Severe Plastic Deformation: The Effects Of Grain Size


Autoria(s): 武晓雷; Ma E
Data(s)

2008

Resumo

Deformation microstructures have been investigated in nanocrystalline (nc) Ni with grain sizes in the 50-100 nm range. It was found that deformation twinning started to occur in grains of similar to 90 nm, and its propensity increased with decreasing grain size. In most of the nc grains dislocations were observed as well, in the form of individual dislocations and dipoles. It is concluded that dislocation-mediated plasticity dominates for grain sizes in the upper half, i.e. 50-100 nm, of the nanocrystalline regime. (C) 2007 Published by Elsevier B.V.

Identificador

http://dspace.imech.ac.cn/handle/311007/25558

http://www.irgrid.ac.cn/handle/1471x/2372

Idioma(s)

英语

Fonte

Materials Science And Engineering A-Structural Materials Properties Microstructure And Processing, 2008, 483: 84-86

Palavras-Chave #Nanocrystalline Metal #Plastic Deformation #Twinning #Dislocation #Ni #Nanostructured Metals #Al #Strength #Ductility #Slip
Tipo

期刊论文