Layer stability and material properties of friction-stirwelded Cu-Nb nanolamellar composite plates

Josef Cobb; Shraddha Vachhani; Robert M. Dickerson; Patricia O. Dickerson; Weizhong Han; Nathan A. Mara; John S. Carpenter; Judy Schneider

doi:10.1080/21663831.2014.918567

Layer stability and material properties of friction-stirwelded Cu-Nb nanolamellar composite plates

Josef Cobb, Shraddha Vachhani, Robert M. Dickerson, Patricia O. Dickerson, Weizhong Han, Nathan A. Mara, John S. Carpenter, Judy Schneider

Chemical Engineering and Materials Science

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

2 Scopus citations

Abstract

Initial efforts to friction-stir weld (FSW) Cu-Nb nanolamellar composite plates fabricated via accumulative roll bonding are reported in this study. Parent material layers within the composite were nominally 300 nm and exhibited a hardness of 2.5 GPa. After FSW, two types of microstructures were present: a refined layered structure, and an equiaxed nanocrystalline microstructure with grain diameters on the order of 7 nm. The type of microstructure was dependent on location within the FSW nugget and related to varying amounts of strain. Material hardness increased with refinement, with the equiaxed microstructure reaching a maximum hardness of 6.0 GPa.

Original language	English (US)
Pages (from-to)	227-232
Number of pages	6
Journal	Materials Research Letters
Volume	2
Issue number	4
DOIs	https://doi.org/10.1080/21663831.2014.918567
State	Published - 2014

Keywords

Copper niobium
Friction-stir welding
Nanograin
Nanolayers

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10.1080/21663831.2014.918567

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abstract = "Initial efforts to friction-stir weld (FSW) Cu-Nb nanolamellar composite plates fabricated via accumulative roll bonding are reported in this study. Parent material layers within the composite were nominally 300 nm and exhibited a hardness of 2.5 GPa. After FSW, two types of microstructures were present: a refined layered structure, and an equiaxed nanocrystalline microstructure with grain diameters on the order of 7 nm. The type of microstructure was dependent on location within the FSW nugget and related to varying amounts of strain. Material hardness increased with refinement, with the equiaxed microstructure reaching a maximum hardness of 6.0 GPa.",

keywords = "Copper niobium, Friction-stir welding, Nanograin, Nanolayers",

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T1 - Layer stability and material properties of friction-stirwelded Cu-Nb nanolamellar composite plates

AU - Cobb, Josef

AU - Vachhani, Shraddha

AU - Dickerson, Robert M.

AU - Dickerson, Patricia O.

AU - Han, Weizhong

AU - Mara, Nathan A.

AU - Carpenter, John S.

AU - Schneider, Judy

PY - 2014

Y1 - 2014

N2 - Initial efforts to friction-stir weld (FSW) Cu-Nb nanolamellar composite plates fabricated via accumulative roll bonding are reported in this study. Parent material layers within the composite were nominally 300 nm and exhibited a hardness of 2.5 GPa. After FSW, two types of microstructures were present: a refined layered structure, and an equiaxed nanocrystalline microstructure with grain diameters on the order of 7 nm. The type of microstructure was dependent on location within the FSW nugget and related to varying amounts of strain. Material hardness increased with refinement, with the equiaxed microstructure reaching a maximum hardness of 6.0 GPa.

AB - Initial efforts to friction-stir weld (FSW) Cu-Nb nanolamellar composite plates fabricated via accumulative roll bonding are reported in this study. Parent material layers within the composite were nominally 300 nm and exhibited a hardness of 2.5 GPa. After FSW, two types of microstructures were present: a refined layered structure, and an equiaxed nanocrystalline microstructure with grain diameters on the order of 7 nm. The type of microstructure was dependent on location within the FSW nugget and related to varying amounts of strain. Material hardness increased with refinement, with the equiaxed microstructure reaching a maximum hardness of 6.0 GPa.

KW - Copper niobium

KW - Friction-stir welding

KW - Nanograin

KW - Nanolayers

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Layer stability and material properties of friction-stirwelded Cu-Nb nanolamellar composite plates

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