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Instrumented indentation probing of laser surface-refined cast Al alloy

机译:激光表面精铸铝合金的仪器压痕探测

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摘要

The surface layer of A319 alloy was refined by selective remelting using laser energy. Instrumented indentation technique was used to measure hardness (H) and elastic modulus (E) of the laser-melted layer. Berkovich tip was used to indent the material for 100-nm, 200-nm, 500-nm, and 1000-nm depths. The H and the E were found to be 1.22 GPa and 78.2 GPa, respectively, for 1000-nm indentation depths. The variances associated with H and E were minimal, whereas, the same for substrate possessed significant scattering. Also, H and E increased with decreasing depth of indentation. Closer examination suggested that when the heterogeneity in the material was in the scale of indentation depth, significant scattering took place and the hard phase Si influenced the average hardness. However, the influence of indentation depth on elastic modulus was not statistically significant.
机译:通过使用激光能量进行选择性重熔来精炼A319合金的表面层。仪器压痕技术用于测量激光熔融层的硬度(H)和弹性模量(E)。使用Berkovich尖端将材料压入100-nm,200-nm,500-nm和1000-nm的深度。对于1000纳米压痕深度,H和E分别为1.22 GPa和78.2 GPa。与H和E相关的方差很小,而底物的方差具有很大的散射。而且,H和E随着压痕深度的减小而增加。仔细检查表明,当材料中的异质性在压痕深度的范围内时,会发生明显的散射,并且硬质相Si影响平均硬度。但是,压痕深度对弹性模量的影响在统计学上不显着。

著录项

  • 来源
    《Journal of Materials Research》 |2004年第1期|p.202-207|共6页
  • 作者单位

    Department of Materials Science and Engineering, Center for Laser Applications, University of Tennessee, Knoxville, Tennessee 37996;

  • 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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