English  |  正體中文  |  简体中文  |  Items with full text/Total items : 68069/68069 (100%)
Visitors : 23036801      Online Users : 168
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version


    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50038


    Title: A study of the relationship between semi-circular shear bands and pop-ins induced by indentation in bulk metallic glasses
    Authors: Chen,KW;Jian,SR;Wei,PJ;Jang,JSC;Lin,JF
    Contributors: 機械工程學系
    Keywords: PLASTIC-DEFORMATION;SERRATED FLOW;NANOINDENTATION;HARDNESS;ALLOYS
    Date: 2010
    Issue Date: 2012-03-27 17:01:52 (UTC+8)
    Publisher: 國立中央大學
    Abstract: In the present study, shear band circles obtained from Vickers indentations (microindentations) on bulk metallic glasses (BMGs) are used to establish the analytical model. Observations of the shear band circle morphologies indicate that the radius ratio of any two adjacent shear band circles is approximately a constant value (C). The modified expanding cavity model developed for the mechanics of shear band is then used to establish the relationship for the pop-ins formed during the loading process of nanoindentations and the shear bands. It was confirmed that the depths of pop-ins are a geometric series with a common ratio of C. The experimental results also indicate that the depth ratio of any two adjacent pop-ins is approximately equal to the radius ratio of two adjacent shear band circles. The ratio of the deformation zone to the contact radius induced by an indentation is a constant, which depends on the constraint factor of the material. The ratios predicted using the present model are consistent with experimental results. After indentation, the shear bands form terraces of various heights. The microstructure and the cause of these terraces are discussed. (C) 2010 Elsevier Ltd. All rights reserved.
    Relation: INTERMETALLICS
    Appears in Collections:[機械工程學系] 期刊論文

    Files in This Item:

    File Description SizeFormat
    index.html0KbHTML253View/Open


    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback  - 隱私權政策聲明