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首页> 外文期刊>Journal of Materials Research >Experimental determination of the fracture toughness via microscratch tests: Application to polymers, ceramics, and metals
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Experimental determination of the fracture toughness via microscratch tests: Application to polymers, ceramics, and metals

机译:通过微划痕试验确定断裂韧性的实验方法:应用于聚合物,陶瓷和金属

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摘要

This article presents a novel microscratch technique for the determination of the fracture toughness of materials from scratch data. While acoustic emission and optical imaging devices provide quantitative evidence of fracture processes during scratch tests, the technique proposed here provides a quantitative means to assess the fracture toughness from the recorded forces and depth of penetration. We apply the proposed method to a large range of materials, from soft (polymers) to hard (metal), spanning fracture toughness values over more than two orders of magnitude. The fracture toughness values so obtained are in excellent agreement with toughness values obtained for the same materials by conventional fracture tests. The fact that the proposed microscratch technique is highly reproducible, almost nondestructive, and requires only small material volumes makes this technique a powerful tool for the assessment of fracture properties for microscale materials science and engineering applications.
机译:本文提出了一种新的微划痕技术,用于从划痕数据确定材料的断裂韧性。尽管声发射和光学成像设备可提供划痕测试期间断裂过程的定量证据,但此处提出的技术提供了一种定量方法,可根据记录的力和穿透深度评估断裂韧性。我们将建议的方法应用于从软(聚合物)到硬(金属)的各种材料,断裂韧性值超过两个数量级。如此获得的断裂韧性值与通过常规断裂试验获得的相同材料的韧性值非常一致。拟议的微划痕技术具有高度可重复性,几乎无损且仅需少量材料的事实,使得该技术成为评估微尺度材料科学和工程应用的断裂性能的有力工具。

著录项

  • 来源
    《Journal of Materials Research》 |2012年第2期|p.485-493|共9页
  • 作者单位

    Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge,Massachusetts 02139;

    CSM Instruments, Needham, Massachusetts 02494;

    Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge,Massachusetts 02139;

  • 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
  • 关键词

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