Influence of Geometry on Interface Fracture Energy Measurements of Thermal Spray Coatings

IF 3.2 2区材料科学 Q2 ENGINEERING, MECHANICAL

Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2025-08-05 DOI:10.1111/ffe.70054

Saim Abbas, Sanjay Sampath, Sudhanshu Mallick, B. Nagamani Jaya

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Abstract

Two novel bending-based interface fracture energy measurement techniques, the modified clamped beam and the modified cantilever, are compared on a model system consisting of air plasma–sprayed alumina over mild steel. Multiple values of interface energies are obtained on the same sample using digital image correlation (DIC)–based crack opening displacement (COD) measurements, converting both these techniques into high throughput. The mean and standard deviation in interface fracture energy (G_C) are found to be geometry dependent, with the modified clamped beam yielding a G_C of 56 ± 16 J/m², while the modified cantilever results in a G_C of 89 ± 5 J/m². The role of the phase angle and stress state on G_C and the resulting spread in the data is discussed. The advantages and limitations of the two geometries are contextualized for testing a variety of thermal spray coating/substrate combinations and other ceramic/metal interfaces.

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几何形状对热喷涂涂层界面断裂能测量的影响

在低碳钢表面空气等离子喷涂氧化铝模型系统上，比较了两种新型的基于弯曲的界面断裂能测量技术——改进夹梁和改进悬臂梁。利用基于数字图像相关（DIC）的裂纹张开位移（COD）测量，在同一样品上获得多个界面能值，将这两种技术转化为高通量。界面断裂能（GC）的平均值和标准差与几何形状有关，改进的夹紧梁的GC为56±16 J/m2，而改进的悬臂梁的GC为89±5 J/m2。讨论了相位角和应力状态对气相色散的影响及其在数据中的扩散。在测试各种热喷涂涂层/基材组合和其他陶瓷/金属界面时，分析了这两种几何形状的优点和局限性。

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来源期刊

Fatigue & Fracture of Engineering Materials & Structures 工程技术-材料科学：综合

CiteScore

6.30

自引率

18.90%

发文量

256

审稿时长

4 months

期刊介绍： Fatigue & Fracture of Engineering Materials & Structures (FFEMS) encompasses the broad topic of structural integrity which is founded on the mechanics of fatigue and fracture, and is concerned with the reliability and effectiveness of various materials and structural components of any scale or geometry. The editors publish original contributions that will stimulate the intellectual innovation that generates elegant, effective and economic engineering designs. The journal is interdisciplinary and includes papers from scientists and engineers in the fields of materials science, mechanics, physics, chemistry, etc.