Intergranular fracture in nanocrystalline metals

被引：221

作者：

Farkas, D ^{[1
]}

Van Swygenhoven, H

Derlet, PM

机构：

[1] Virginia Polytech Inst & State Univ, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA

[2] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

来源：

PHYSICAL REVIEW B | 2002年 / 66卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.66.060101

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Crack propagation studies in nanocrystalline Ni samples with mean grain sizes ranging from 5 to 12 nm are reported using atomistic simulations. For all grain sizes pure intergranular fracture is observed. Intergranular fracture is shown to proceed by the coalescence of microvoids formed at the grain boundaries ahead of the crack. The energy released during propagation is higher than the Griffith value, indicating an additional grain-boundary accommodation mechanism.

引用

页码：601011 / 601014

页数：4

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