Microsample tensile testing of nanocrystalline metals

Legros, Marc; Elliott, B. R.; Rittner, M.; Weertman, J.; Hemker, Kevin J.

doi:10.1080/01418610008212096

Cited by 284 publications

(126 citation statements)

References 23 publications

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“…The uniform elongation plotted against the tensile yield strength for nanocrystalline copper, as obtained from several studies. The line is used to demarcate the ductility versus strength trade-off for most nanocrystalline Cu studies in the literature 121,[135][136][137][138][139] (versus coarse-grain copper 140,141 ). However, several studies used microstructure design and consolidation to push the strength and ductility beyond this limit 134,140,143,144 Despite the ability to push the strength and ductility, these nanocrystalline and highly twinned microstructures still have problems with either thermal stability and/or scalability to bulk dimensions due to the processing method used.…”

Section: Ductilitymentioning

confidence: 99%

“Bulk” Nanocrystalline Metals: Review of the Current State of the Art and Future Opportunities for Copper and Copper Alloys

Tschopp

Murdoch

Kecskes

et al. 2014

JOM

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It is a new beginning for innovative fundamental and applied science in nanocrystalline materials. Many of the processing and consolidation challenges that have haunted nanocrystalline materials are now more fully understood, opening the doors for bulk nanocrystalline materials and parts to be produced. While challenges remain, recent advances in experimental, computational, and theoretical capability have allowed for bulk specimens that have heretofore been pursued only on a limited basis. This article discusses the methodology for synthesis and consolidation of bulk nanocrystalline materials using mechanical alloying, the alloy development and synthesis process for stabilizing these materials at elevated temperatures, and the physical and mechanical properties of nanocrystalline materials with a focus throughout on nanocrystalline copper and a nanocrystalline Cu-Ta system, consolidated via equal channel angular extrusion, with properties rivaling that of nanocrystalline pure Ta. Moreover, modeling and simulation approaches as well as experimental results for grain growth, grain boundary processes, and deformation mechanisms in nanocrystalline copper are briefly reviewed and discussed. Integrating experiments and computational materials science for synthesizing bulk nanocrystalline materials can bring about the next generation of ultrahigh strength materials for defense and energy applications.

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Section: Ductilitymentioning

confidence: 99%

“Bulk” Nanocrystalline Metals: Review of the Current State of the Art and Future Opportunities for Copper and Copper Alloys

Tschopp

Murdoch

Kecskes

et al. 2014

JOM

View full text Add to dashboard Cite

show abstract

“…But here again the majority of the property data are from hardness and compression tests. The tensile test that showed the highest strength so far for nc Cu employed samples prepared using gas-phase condensation followed by in situ consolidation to 99% of theoretical density [3]. This Cu, with an average d of 26 nm, showed a yield strength ðr y Þ of 535 MPa in tension, higher than all previous nc Cu.…”

Section: Introductionmentioning

confidence: 99%

“…from the electrolyte and organic additives, or heavily textured and stressed microstructures. Even though efforts have been made to improve these techniques to obtain high-quality pure metal samples, the tensile properties observed still remain largely unreliable, especially when the strength and ductility are both significantly lower than those observed in compression [3].…”

Section: Introductionmentioning

confidence: 99%

“…To date, the tensile properties of several bulk fcc nc metals (such as Cu, Ni and Al) have been reported [3][4][5][6][7][8][9]. These results were extracted mostly from materials prepared through the inert gas condensation or electrodeposition routes.…”

Section: Introductionmentioning

confidence: 99%

“…Copper, in particular, has been a model nc material [1][2][3][4][5][6][7][8][9][10][11][12]. But here again the majority of the property data are from hardness and compression tests.…”

Section: Introductionmentioning

confidence: 99%

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