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    Analytical and Experimental Determination of Rate- and Temperature-Dependent Length Scales Using Nanoindentation Experiments

    Source: Journal of Nanomechanics and Micromechanics:;2011:;Volume ( 001 ):;issue: 001
    Author:
    George Z. Voyiadjis
    ,
    Danial Faghihi
    ,
    Cheng Zhang
    DOI: 10.1061/(ASCE)NM.2153-5477.0000027
    Publisher: American Society of Civil Engineers
    Abstract: This work addresses the temperature and rate indentation size effects (TRISE) encountered in nanoindentation experiments and the corresponding material intrinsic length scales at different strain rates. The same value for the material length scale cannot be used for different rate, temperature, and accumulated plastic-strain conditions. A variable length scale is introduced in this work and used on two different face-centered cubic (FCC) metals. Indentation experiments are performed on copper and aluminum polycrystalline samples for different strain rates. To check the validity of the assumed concept for local hardening in nanoindentation, additional experiments are conducted on single-crystal materials. The existing theories describing the indentation size effects and length scales are reviewed, and a physically based model that depends on strain rate, accumulated plastic strain, and temperature that were scaled with hardness experiments results is proposed for length scales. Furthermore, numerical simulations are performed by using the
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      Analytical and Experimental Determination of Rate- and Temperature-Dependent Length Scales Using Nanoindentation Experiments

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/67534
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    • Journal of Nanomechanics and Micromechanics

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    contributor authorGeorge Z. Voyiadjis
    contributor authorDanial Faghihi
    contributor authorCheng Zhang
    date accessioned2017-05-08T21:57:49Z
    date available2017-05-08T21:57:49Z
    date copyrightMarch 2011
    date issued2011
    identifier other%28asce%29nm%2E2153-5477%2E0000070.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/67534
    description abstractThis work addresses the temperature and rate indentation size effects (TRISE) encountered in nanoindentation experiments and the corresponding material intrinsic length scales at different strain rates. The same value for the material length scale cannot be used for different rate, temperature, and accumulated plastic-strain conditions. A variable length scale is introduced in this work and used on two different face-centered cubic (FCC) metals. Indentation experiments are performed on copper and aluminum polycrystalline samples for different strain rates. To check the validity of the assumed concept for local hardening in nanoindentation, additional experiments are conducted on single-crystal materials. The existing theories describing the indentation size effects and length scales are reviewed, and a physically based model that depends on strain rate, accumulated plastic strain, and temperature that were scaled with hardness experiments results is proposed for length scales. Furthermore, numerical simulations are performed by using the
    publisherAmerican Society of Civil Engineers
    titleAnalytical and Experimental Determination of Rate- and Temperature-Dependent Length Scales Using Nanoindentation Experiments
    typeJournal Paper
    journal volume1
    journal issue1
    journal titleJournal of Nanomechanics and Micromechanics
    identifier doi10.1061/(ASCE)NM.2153-5477.0000027
    treeJournal of Nanomechanics and Micromechanics:;2011:;Volume ( 001 ):;issue: 001
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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