Non-destructive detection of machining-induced white layers through grain size and crystallographic texture-sensitive methods
Non-destructive detection of machining-induced white layers through grain size and crystallographic texture-sensitive methods
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DOI：
10.1016/j.matdes.2021.109472
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发表时间：
2021-01-19
影响因子：
8.4
通讯作者：
Ghadbeigi, H.
中科院分区：
文献类型：
--
作者：
Brown, M.;Pieris, D.;Ghadbeigi, H.
检测加工引起的白色层目前是一种破坏性的检查过程，需要一种形式的横断面显微镜。因此，本文报道了一种新的无损检测方法的发展，该方法使用晶粒尺寸敏感和晶体纹理敏感技术来检测白色层。结果表明，由于ti - 6al - 4v中低于100 nm的晶粒尺寸和较高的晶格应变，以及该钛合金强烈的晶体织构的影响，通过对衍射峰宽度和衍射峰强度的测量，x射线衍射可以检测到ti - 6al - 4v中薄至5 μ m的白层。与现有的光学显微镜检测方法相比，由于涉及的步骤数量，可能需要几天的时间，x射线衍射峰宽度方法在几分钟内以5 μ m或更小的分辨率提供了非破坏性的白层检测，与光学方法直接竞争。空间分辨声光谱是一种激光产生的超声表面声波检测方法，由于它对严重塑性变形的Ti-6Al-4V（含6%铝和4%钒的钛）中出现的晶体织构变化敏感，因此也可用于识别含有白色层或扫掠晶粒材料的异常表面。(C) 2021作者。Elsevier Ltd.出版。
Detection of machining-induced white layers is currently a destructive inspection process with a form of cross-sectional microscopy required. This paper, therefore, reports on the development of a novel non-destructive inspection method for detecting white layers using grain size-sensitive and crystallographic texture-sensitive techniques. It is shown that x-ray diffraction can be used to detect white layers as thin as 5 mu m in Ti-6Al-4 V through measurement of diffraction peak breadths and diffraction peak intensities, due to the influence of the sub 100 nm grain size and high lattice strain in the white layer, as well as the strong crystallographic texture in this titanium alloy. Compared to the existing optical microscopy inspection method, which can take days due to the number of steps involved, the x-ray diffraction peak breadth method offers non-destructive white layer detection in a matter of minutes at a resolution of 5 mu m or less that competes directly with the optical method. Spatially resolved acoustic spectroscopy, a laser-generated ultrasonic surface acoustic wave detection method, can also be used to identify anomalous surfaces, containing a white layer or swept grain material, due to its sensitivity to the crystallographic texture changes that arise in severely plastically deformed Ti-6Al-4V as in Titanium with 6% Aluminium and 4% Vanadium. (C) 2021 The Author(s). Published by Elsevier Ltd.