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High-speed nanoindentation mapping of a near-alpha titanium alloy made by additive manufacturing

机译：添加剂制造业近α钛合金的高速纳米凸缘映射

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摘要

Titanium alloys are widely used in additive manufacturing, but their complex microstructures and related micromechanical properties have not been fully explored. Here, we employ high-speed nanoindentation mapping, electron probe microanalysis, and electron backscatter diffraction to characterize as-deposited and heat-treated Ti-6Al-2Zr-Mo-V alloys. Our results show the correlations between mechanical contrasts (hardness and elastic modulus) and phase contrasts (α and β). The hardness and elastic modulus of the α and β phases are increased due to the element redistribution after annealing (Al diffuses from β to α; Mo and V diffuse from α to β). We use a K-means clustering algorithm to analyze the nanoindentation dataset and correlate the mechanical property maps to the distribution of α and β phases. Our study employs the emerging high-speed nanoindentation mapping to give a better understanding of the microstructure-mechanical property relationship of additive manufactured multiphase alloys across length scales.
机译：钛合金广泛用于添加制造，但它们的复杂微观结构和相关的微机械性能尚未得到充分探索。这里，我们采用高速纳米凸起映射，电子探针微分析和电子反向散射衍射，以表征沉积和热处理的Ti-6Al-2Zr-Mo-V合金。我们的结果表明机械对比（硬度和弹性模量）和相对比度（α和β）之间的相关性。由于退火后的元素再分配（Al从β扩散到α; v弥漫从α至β扩散），α和β相的硬度和弹性模量增加了α和β相的α和β相的弹性模量。我们使用K-means聚类算法来分析纳米凸缘数据集，并将机械特性图与α和β相的分布相关联。我们的研究采用了新兴的高速纳米狭窄映射，以更好地理解跨长度尺度的添加剂制造的多相合金的微观结构 - 力学性能关系。

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  • 来源
    《Journal of Materials Research》 |2021年第11期|2223-2234|共12页
  • 作者

    Zhiying Liu; Jiahui Zhang; Bei He; Yu Zou;

  • 作者单位

    Department of Materials Science and Engineering University of Toronto Toronto ON M5S 3E4 Canada;

    Department of Materials Science and Engineering University of Toronto Toronto ON M5S 3E4 Canada Department of Mechanical and Energy Engineering Southern University of Science and Technology Guangdong 518055 People's Republic of China;

    Research Institute for Frontier Science Beihang University 37 Xueyuan Road Beijing People's Republic of China;

    Department of Materials Science and Engineering University of Toronto Toronto ON M5S 3E4 Canada;

  • 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
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