孔入口倒角的超声联合强化

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International Pub Date : 2025-03-26 DOI:10.1016/j.triboint.2025.110669

Mohammad Keymanesh , Mingjun Tang , Kanghua Huang , Hansong Ji , Zefeng Chen , Pingfa Feng , Jianfu Zhang

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引用次数: 0

摘要

在孔的边缘和倒角表面产生裂纹往往是由加工后的不均匀残余应力和表面不规则性引起的。为了提高孔入口倒角的疲劳性能，采用了一种新型的超声冲击处理方法，并将其与锥度表面抛光技术相结合。以7050-T7451铝合金为例，评价了UIT、TSB和组合方法对孔倒角表面形貌、粗糙度、残余应力和疲劳性能的影响。结果表明，UIT和TSB工艺相结合可提供最佳的倒角表面完整性，从而显著降低疲劳裂纹扩展速率，从而显著提高疲劳寿命。

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Ultrasonic combined enhancement on hole entrance chamfers

Crack initiation at the edges and chamfer surfaces of holes is often caused by non-uniform residual stresses and surface irregularities after machining. In order to improve the fatigue performance of the hole entrance chamfer, a novel ultrasonic impact treatment (UIT) approach and its combination with the taper surface burnishing (TSB) technique were employed. Taking 7050-T7451 aluminum alloy and the example, the effects of UIT, TSB, and combined methods on the surface morphology, roughness, residual stress, and fatigue performance of hole chamfers were evaluated. The results show that the combination of UIT and TSB processes provided the best chamfer surface integrity, leading to a significant reduction in the fatigue crack propagation rate and in turn a remarkable increase in fatigue life.

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来源期刊

Tribology International 工程技术-工程：机械

CiteScore

10.10

自引率

16.10%

发文量

627

审稿时长

35 days

期刊介绍： Tribology is the science of rubbing surfaces and contributes to every facet of our everyday life, from live cell friction to engine lubrication and seismology. As such tribology is truly multidisciplinary and this extraordinary breadth of scientific interest is reflected in the scope of Tribology International. Tribology International seeks to publish original research papers of the highest scientific quality to provide an archival resource for scientists from all backgrounds. Written contributions are invited reporting experimental and modelling studies both in established areas of tribology and emerging fields. Scientific topics include the physics or chemistry of tribo-surfaces, bio-tribology, surface engineering and materials, contact mechanics, nano-tribology, lubricants and hydrodynamic lubrication.