Grain boundary doping strengthens nanocrystalline copper alloys

Sezer Özerinç; Kaiping Tai; Nhon Q. Vo; Pascal Bellon; Robert S. Averback; William P. King

doi:10.1016/j.scriptamat.2012.06.031

Grain boundary doping strengthens nanocrystalline copper alloys

Sezer Özerinç, Kaiping Tai, Nhon Q. Vo, Pascal Bellon, Robert S. Averback, William P. King

Research output: Contribution to journal › Article › peer-review

Abstract

Nanoindentation hardness measurements were performed on nanocrystalline (nc-) Cu alloys to test recent molecular dynamics predictions that (i) solute segregation to grain boundaries can lead to significant strengthening and (ii) solutes with large size mismatch with Cu are most effective. Results show that the hardness of nc-Cu ₉₀Nb ₁₀ is greater than 5 GPa, more than double that of pure nc-Cu, whereas similar additions of Fe solute have nearly no effect. These results are in good agreement with simulations.

Original language	English (US)
Pages (from-to)	720-723
Number of pages	4
Journal	Scripta Materialia
Volume	67
Issue number	7-8
DOIs	https://doi.org/10.1016/j.scriptamat.2012.06.031
State	Published - Oct 2012

Keywords

Grain boundary energy
Grain boundary strengthening
Nanocrystalline metal
Nanohardness
Nanoindentation

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

Online availability

10.1016/j.scriptamat.2012.06.031

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title = "Grain boundary doping strengthens nanocrystalline copper alloys",

abstract = "Nanoindentation hardness measurements were performed on nanocrystalline (nc-) Cu alloys to test recent molecular dynamics predictions that (i) solute segregation to grain boundaries can lead to significant strengthening and (ii) solutes with large size mismatch with Cu are most effective. Results show that the hardness of nc-Cu 90Nb 10 is greater than 5 GPa, more than double that of pure nc-Cu, whereas similar additions of Fe solute have nearly no effect. These results are in good agreement with simulations.",

keywords = "Grain boundary energy, Grain boundary strengthening, Nanocrystalline metal, Nanohardness, Nanoindentation",

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note = "Funding Information: This research was supported by the US DoE BES under Grant DEFG02-05ER46217 . The work was carried out, in part, in the Frederick Seitz Materials Research Laboratory Central Facilities, University of Illinois. We thank Prof. Y. Ashkenazy for helpful discussions and for sharing his simulation results.",

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doi = "10.1016/j.scriptamat.2012.06.031",

language = "English (US)",

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AU - Özerinç, Sezer

AU - Tai, Kaiping

AU - Vo, Nhon Q.

AU - Bellon, Pascal

AU - Averback, Robert S.

AU - King, William P.

N1 - Funding Information: This research was supported by the US DoE BES under Grant DEFG02-05ER46217 . The work was carried out, in part, in the Frederick Seitz Materials Research Laboratory Central Facilities, University of Illinois. We thank Prof. Y. Ashkenazy for helpful discussions and for sharing his simulation results.

PY - 2012/10

Y1 - 2012/10

N2 - Nanoindentation hardness measurements were performed on nanocrystalline (nc-) Cu alloys to test recent molecular dynamics predictions that (i) solute segregation to grain boundaries can lead to significant strengthening and (ii) solutes with large size mismatch with Cu are most effective. Results show that the hardness of nc-Cu 90Nb 10 is greater than 5 GPa, more than double that of pure nc-Cu, whereas similar additions of Fe solute have nearly no effect. These results are in good agreement with simulations.

AB - Nanoindentation hardness measurements were performed on nanocrystalline (nc-) Cu alloys to test recent molecular dynamics predictions that (i) solute segregation to grain boundaries can lead to significant strengthening and (ii) solutes with large size mismatch with Cu are most effective. Results show that the hardness of nc-Cu 90Nb 10 is greater than 5 GPa, more than double that of pure nc-Cu, whereas similar additions of Fe solute have nearly no effect. These results are in good agreement with simulations.

KW - Grain boundary energy

KW - Grain boundary strengthening

KW - Nanocrystalline metal

KW - Nanohardness

KW - Nanoindentation

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Grain boundary doping strengthens nanocrystalline copper alloys

Abstract

Keywords

ASJC Scopus subject areas

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