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Instrumented indentation study of plastic deformation in bulk metallic glasses

机译:大块金属玻璃塑性变形的仪器压痕研究

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摘要

Mechanical properties and micro-plastic deformation behavior of five bulk metallic glasses (BMGs) were studied by instrumented indentation. These materials included La_(60)Al_(10)Ni_(10)Cu_(20), Mg_(65)Cu_(250)Gd_(10), Zr_(52.5)Al_(10)Ni_(10)Cu_(15)Be_(12.5), Cu_(60)Zr_(20)Hf_(10)Ti_(10), and Ni_(60)Nb_(37)Sn_3 alloys. Remarkable difference in deformation behavior was found in the load-displacement curves of nanoindentation and pile up morphologies around the indents. Serrated plastic deformation depended on the loading rate was found in Mg-, Zr-, and Cu-based BMGs. The subsurface plastic deformation zone of typical alloys was investigated through bonded interface technique using depth-sensing micro indentation. Large and widely spaced shear bands were observed in Mg-based BMG. The effect of loading rate on the indentation deformation behaviors in different BMGs was elucidated by the change of shear band pattern.
机译:通过仪器压痕研究了五块金属玻璃的力学性能和微塑性变形行为。这些材料包括La_(60)Al_(10)Ni_(10)Cu_(20),Mg_(65)Cu_(250)Gd_(10),Zr_(52.5)Al_(10)Ni_(10)Cu_(15)Be_ (12.5),Cu_(60)Zr_(20)Hf_(10)Ti_(10)和Ni_(60)Nb_(37)Sn_3合金。在纳米压痕的载荷-位移曲线和压痕周围的堆积形态中发现了明显不同的变形行为。在基于Mg,Zr和Cu的BMG中发现锯齿状塑性变形取决于加载速率。通过结合界面技术,使用深度感应微压痕技术研究了典型合金的表面塑性变形区。在基于镁的BMG中观察到较大且间隔较大的剪切带。通过剪切带模式的变化阐明了加载速率对不同BMG压痕变形行为的影响。

著录项

  • 来源
    《Journal of Materials Research》 |2006年第1期|p.75-81|共7页
  • 作者

    W.H. Li; T.H. Zhang; D.M. Xing;

  • 作者单位

    Institute of Materials, Shanghai University-, Shanghai 200072, People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
  • 关键词

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