Journal ArticleDOI
Size effects in Al nanopillars: Single crystalline vs. bicrystalline
TLDR
In this paper, the authors studied the mechanical behavior of bicrystalline aluminum nano-pillars under uniaxial compression and revealed size effects, a stochastic stress-strain signature, and strain hardening.About:
This article is published in Acta Materialia.The article was published on 2011-06-01. It has received 169 citations till now. The article focuses on the topics: Grain boundary & Work hardening.read more
Citations
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Plasticity in small-sized metallic systems: Intrinsic versus extrinsic size effect
TL;DR: In this paper, the authors provide an overview of metal-based material classes whose properties as a function of external size have been investigated and provide a critical discussion on the combined effects of intrinsic and extrinsic sizes on the material deformation behavior.
Journal ArticleDOI
Mechanical behavior of high-entropy alloys
TL;DR: In this article, the authors present a comprehensive, critical review of the mechanical behavior of high-entropy alloys and some closely related topics, including thermodynamics and kinetics.
Journal ArticleDOI
Overview on micro- and nanomechanical testing: New insights in interface plasticity and fracture at small length scales
TL;DR: In this paper, the challenges of instrumented micro-and nanomechanical testing at elevated temperature are summarized and a special focus is laid on the pitfalls of micro-compression testing with its stringent boundary conditions often hampering reliable experiments.
Journal ArticleDOI
Mechanistic investigation of a low-alloy Mg–Ca-based extrusion alloy with high strength–ductility synergy
Hucheng Pan,Rui Kang,Li Jingren,Hongbo Xie,Zhuoran Zeng,Qiuyan Huang,Changlin Yang,Yuping Ren,Gaowu Qin +8 more
TL;DR: In this article, a low-alloy Mg-Ca-based alloy that overcomes this strength-ductility trade-off is designed, which has an excellent tensile yield strength (∼425 MPa).
Journal ArticleDOI
Size-Dependent Deformation of Nanocrystalline Pt Nanopillars
X. Wendy Gu,Colleen N. Loynachan,Zhaoxuan Wu,Yong-Wei Zhang,David J. Srolovitz,David J. Srolovitz,Julia R. Greer +6 more
TL;DR: The simulations demonstrate that the size-dependent behavior is associated with the distinct deformation mechanisms operative in interior versus surface grains, which is opposite to the "smaller is stronger" size effect in single crystalline nanostructures.
References
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Journal ArticleDOI
Sample dimensions influence strength and crystal plasticity.
TL;DR: Measurements of plastic yielding for single crystals of micrometer-sized dimensions for three different types of metals find that within the tests, the overall sample dimensions artificially limit the length scales available for plastic processes.
Journal ArticleDOI
Plasticity in small-sized metallic systems: Intrinsic versus extrinsic size effect
TL;DR: In this paper, the authors provide an overview of metal-based material classes whose properties as a function of external size have been investigated and provide a critical discussion on the combined effects of intrinsic and extrinsic sizes on the material deformation behavior.
Journal ArticleDOI
Size dependence of mechanical properties of gold at the micron scale in the absence of strain gradients
TL;DR: In this article, the authors used uniaxial compression experiments on Au cylinders at the sub-micron scale, without stress/strain gradients, and determined compression stress, strain, and stiffness of the pillars.
Journal ArticleDOI
Nanoscale gold pillars strengthened through dislocation starvation
Julia R. Greer,William D. Nix +1 more
TL;DR: In this article, the authors showed that submicrometer sized gold crystals can be 50 times stronger than their bulk counterparts due to the elimination of defects from the crystal in the course of deformation.
Journal ArticleDOI
Ultra-strength materials
TL;DR: In this paper, an overview of the principal deformation mechanisms of ultra-strength materials is presented, and the fundamental defect processes that initiate and sustain plastic flow and fracture are described, as well as the mechanics and physics of both displacive and diffusive mechanisms.