Spherical indentation of copper: Crystal plasticity vs experiment

被引：21

作者：

Cackett, Alexandra J. ^{[1
,2
]}

Hardie, Chris D. ^{[1
,3
]}

Lim, Joven J. H. ^{[1
]}

Tarleton, Edmund ^{[3
]}

机构：

[1] UK Atom Energy Author, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England

[2] Queen Mary Univ London, Sch Engn & Mat Sci, Mile End Rd, London E1 4NS, England

[3] Univ Oxford, Dept Mat, Parks Rd, Oxford OX1 3PH, England

来源：

MATERIALIA | 2019年 / 7卷

基金：

欧盟地平线“2020”; 英国工程与自然科学研究理事会;

关键词：

Size effects; Spherical nanoindentation; Crystal plasticity; TKD; EBSD; TEM; TRANSMISSION KIKUCHI DIFFRACTION; DISLOCATION DENSITY; LATTICE ROTATIONS; SINGLE-CRYSTALS; ELASTIC STRAIN; SIZE; STRENGTH; TEM; DEFORMATION; SIMULATIONS;

D O I：

10.1016/j.mtla.2019.100368

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We analyse spherical nanoindentation of single crystal copper using two different indenter tips of radii 7.4 and 27 mu m. The surface deformation surrounding the indents was measured using atomic force microscopy and the elastic rotation fields under the indents were measured using electron diffraction and transmission techniques. Using the measured load-displacement, surface relief, plastic zone size, and elastic rotation field removed the ambiguity in the optimal slip and hardening law parameters in a three parameter strain gradient crystal plasticity model. In addition to geometrically necessary dislocations, other hardening mechanisms were found to contribute to the size effect.

引用

页数：8

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