Tailoring stacking fault energy for high ductility and high strength in ultrafine grained Cu and its alloy

@article{Zhao2006TailoringSF,
  title={Tailoring stacking fault energy for high ductility and high strength in ultrafine grained Cu and its alloy},
  author={Yonghao Zhao and Yuntian Zhu and Xiaozhou Liao and Zenji Horita and Terence G. Langdon},
  journal={Applied Physics Letters},
  year={2006},
  volume={89},
  pages={121906}
}
Bulk ultrafine grained (UFG) materials produced by severe plastic deformation often have low ductility. Here the authors report that simultaneous increases in ductility and strength can be achieved by tailoring the stacking fault energy (SFE) via alloying. Specifically, UFG bronze (Cu 10wt.% Zn) with a SFE of 35mJ∕m2 was found to have much higher strength and ductility than UFG copper with a SFE of 78mJ∕m2. Accumulations of both twins and dislocations during tensile testing play a significant… Expand

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References

SHOWING 1-10 OF 30 REFERENCES
Deformation behavior and plastic instabilities of ultrafine-grained titanium
Ultrafine-grained (UFG) Ti samples have been prepared using equal channel angular pressing followed by cold rolling and annealing. The deformation behavior of these materials, including strainExpand
Influence of stacking fault energy on nanostructure formation under high pressure torsion
Copper, bronze (Cu–10 wt.% Zn) and brass (Cu–30 wt.% Zn) were deformed by high pressure torsion (HPT) under a pressure of 6 GPa for five rotations. The stacking fault energies (SFEs) of copper,Expand
Strain hardening and large tensile elongation in ultrahigh-strength nano-twinned copper
A high density of growth twins in pure Cu imparts high yield strength while preserving the capacity for efficient dislocation storage, leading to high strain hardening rates at high flow stresses,Expand
Optimization of strength and ductility in nanocrystalline and ultrafine grained metals
Abstract The possible optimization of strength and ductility in nanocrystalline and ultrafine grained metals is assessed. Most nanocrystalline metals show little ductility while exhibiting enhancedExpand
Ultrahigh strength and high ductility of bulk nanocrystalline copper
We have synthesized artifact-free bulk nanocrystalline copper samples with a narrow grain size distribution (mean grain size of 23nm) that exhibited tensile yield strength about 11 times higher thanExpand
Eight routes to improve the tensile ductility of bulk nanostructured metals and alloys
  • E. Ma
  • Materials Science
  • 2006
Nanostructured metals and alloys are under intensive research worldwide and being developed into bulk forms for application. While these new materials offer record-high strength, their ductility isExpand
Simultaneously Increasing the Ductility and Strength of Nanostructured Alloys
In this paper we report a strategy to simultaneously increase the ductility and strength of bulk nanostructured materials. By engineering very small second-phase particles into a nanostructured AlExpand
Paradox of strength and ductility in metals processed by severe plastic deformation
It is well known that plastic deformation induced by conventional forming methodssuch as rolling, drawing or extrusion can significantly increase the strength of metalsHowever, this increase isExpand
High tensile ductility in a nanostructured metal
TLDR
A thermomechanical treatment of Cu is described that results in a bimodal grain size distribution, with micrometre-sized grains embedded inside a matrix of nanocrystalline and ultrafine (<300 nm) grains, which impart high strength, as expected from an extrapolation of the Hall–Petch relationship. Expand
Deformation behavior of bimodal nanostructured 5083 Al alloys
Cryomilled 5083 Al alloys blended with volume fractions of 15, 30, and 50 pct unmilled 5083 Al were produced by consolidation of a mixture of cryomilled 5083 Al and unmilled 5083 Al powders. AExpand
...
1
2
3
...