Improving the precision of Vickers indentation measurements in soda-lime glass with increased dwell time

Improving the precision of Vickers indentation measurements in soda-lime glass with increased dwell time
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通过增加停留时间提高钠钙玻璃中维氏压痕测量的精度

DOI:
10.1016/j.jnoncrysol.2023.122174
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发表时间:
2023
影响因子:
3.5
通讯作者:
Flores, Katharine M.
Flores, Katharine M.
中科院分区:
材料科学2区
文献类型:
--
作者:
Weeks, W. Porter;Flores, Katharine M.

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维氏压痕法是测定硅酸盐玻璃硬度、压痕断裂韧性和抗裂性的常用方法,主要是由于该方法的简单和高效。尽管该方法很受欢迎,但从这些测量中获得一致和可重复的结果是具有挑战性的。在这里,我们系统地研究了施加载荷、停留时间和压痕后观察时间对通过维氏微压痕测量的钠钙硅酸盐玻璃硬度和压痕断裂韧性值精度的影响。结果表明,较低的外加载荷(≤1.06 N)和较短的停留时间(≤15 s)导致测量精度较低,较长的停留时间(30 s)可以提高测量精度和不受载荷影响的压痕断裂韧性。在较长的停留时间内,这些测量的可重复性增加,可以使维氏微压痕成为测量硅酸盐玻璃力学性能的可靠技术。
Vickers indentation methods are popular techniques for the determination of hardness, indentation fracture toughness, and crack initiation resistance in silicate glasses, predominantly due to the simplicity and efficiency of the technique. Despite the method's popularity, it is challenging to obtain consistent and repeatable results from these measurements. Here, we perform a systematic investigation of the effects of applied load, dwell time, and post-indentation observation time on the precision of hardness and indentation fracture toughness values for soda-lime silicate glass measured via Vickers microindentation. The data suggests that low applied loads (≤ 1.06 N) in combination with short dwell times (≤ 15 s) lead to low precision in the measurements and that a longer dwell time of 30 s leads to higher precision and load-independent indentation fracture toughness. The increased repeatability of these measurements at higher dwell time could make Vickers microindentation a reliable technique for silicate glass mechanical property measurement.
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