Grain size gradient length scale in ballistic properties optimization of functionally graded nanocrystalline steel plates

SCRIPTA MATERIALIA

卷:69

Article

Jerusalem, Antoine¹  Dickson, William²  Perez-Martin, Maria Jesus³  Dao, Ming²  Lu, Jian⁴  Galvez, Francisco³ 

[1] Univ Oxford, Dept Engn Sci, Parks Rd, Oxford OX1 3PJ, England

[2] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

[3] Univ Politecn Madrid, ETSI Caminos Canales & Puertos, Dept Mat Sci, E-28040 Madrid, Spain

[4] City Univ Hong Kong, Dept Syst Engn & Engn Management & Mech & Biomed, Kowloon Tong, Hong Kong, Peoples R China

关键词: Ballistic properties;    Optimization;    Nanocrystals;    Nanotwinned ultrafine crystals;    Grain size gradient;   

DOI  :  10.1016/j.scriptamat.2013.08.025

来源: Elsevier

【 摘 要 】

The last few years have highlighted the existence of two relevant length scales in the quest to ultrahigh-strength polycrystalline metals. Whereas the microstructural length scale - e.g. grain or twin size - has mainly be linked to the well-established Hall-Petch relationship, the sample length scale - e.g. nanopillar size - has also proven to be at least as relevant, especially in microscale structures. In this letter, a series of ballistic tests on functionally graded nanocrystalline plates are used as a basis for the justification of a grain size gradient length scale as an additional ballistic properties optimization parameter. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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