高循环疲劳下铝合金变形缓解的相关特性

IF 0.7 4区 材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING
G. G. Pysarenko, A. V. Byalonovych, L. E. Matokhnyuk, O. V. Voinalovych, I. V. Lymanskyi, O. E. Gopkalo, A. M. Mailo
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引用次数: 0

摘要

研究了带有中心孔形式应力集中器的 1.5 毫米厚 D16 板材在循环加载下的机械性能、合金微观结构和抗疲劳性。在应力集中器区域的疲劳损伤累积过程中,定期记录峰谷形式的微变形浮雕变化,以定量评估试样表面离散变形浮雕的参数。为了分析中观结构变形,用波长为 0.45 μm 的相干照射源照射试样表面,观察试样表面的凹凸变化。构建了高循环变形阶段试样表面变形参数的动力学图,并确定了与散射损伤相关的表层变形浮雕参数。根据变形试样表面局部峰谷空间参数的测量结果,构建了疲劳局部化动力学图。结果表明,这些图可以用来判断循环加载材料的残余寿命。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Correlation Characteristics of the Deformation Relief of an Aluminum Alloy Under High-Cycle Fatigue

Correlation Characteristics of the Deformation Relief of an Aluminum Alloy Under High-Cycle Fatigue

The mechanical properties, alloy microstructure, and fatigue resistance under cyclic loading of a 1.5 mm thick D16 sheet with a stress concentrator in the form of a central hole were investigated. In the process of fatigue damage accumulation in the area of the stress concentrator, changes in the microdeformation relief in the form of peaks and troughs were periodically recorded to quantitatively assess the parameters of the discrete deformation relief on the surface of specimens. To analyze mesostructural deformations, the surface relief of specimens was observed by illuminating their surface with a coherent irradiation source with a wavelength of 0.45 μm. Kinetic plots of the deformation parameters of the surface of specimens at the stages of high-cycle deformation were constructed, and the parameters of the deformation relief of the surface layer, which correlates with the scattered damage, were determined. Based on the measurements of the spatial parameters of local peaks and troughs of the deformed specimen surface, kinetic plots of fatigue localization were constructed. It is shown that these plots can be used to judge the residual life of a cyclically loaded material.

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来源期刊
Strength of Materials
Strength of Materials MATERIALS SCIENCE, CHARACTERIZATION & TESTING-
CiteScore
1.20
自引率
14.30%
发文量
89
审稿时长
6-12 weeks
期刊介绍: Strength of Materials focuses on the strength of materials and structural components subjected to different types of force and thermal loadings, the limiting strength criteria of structures, and the theory of strength of structures. Consideration is given to actual operating conditions, problems of crack resistance and theories of failure, the theory of oscillations of real mechanical systems, and calculations of the stress-strain state of structural components.
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