Surface Integrity and Fatigue Response of Lamellar Ti6Al4V Alloy after Cryogenic Machining

Procedia CIRP Pub Date : 2026-01-01 Epub Date: 2026-08-04 DOI:10.1016/j.procir.2026.02.077

R. Bertolini, A. Stramare, A. Campagnolo, A. Ghiotti, S. Bruschi

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引用次数: 0

Abstract

Cryogenic machining is emerging as an alternative to flood machining due to its various advantages, including improved surface integrity in machined components. Additionally, it is an environmentally friendly and clean solution that aligns well with the sustainability goals of modern high-performance industries. Nevertheless, for it to become widely adopted, it is essential to understand its impact on in-service properties, such as fatigue strength.

In this context, the present study examines the effect of cryogenic machining on the fatigue strength of the wrought Ti6Al4V alloy, which has a lamellar microstructure. Machining tests were carried out under both flood and cryogenic conditions. Subsequently, surface integrity was evaluated in terms of microstructure, hardness, residual stresses, and surface finish. Fatigue tests were conducted using a rotating bending configuration to evaluate the impact of surface integrity alterations resulting from machining.

The results show that cryogenic machining slightly improves the fatigue life of the lamellar Ti6Al4V alloy compared to flood machining, demonstrating its potential as a reliable, but environmentally friendly and clean alternative.

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层状Ti6Al4V合金低温加工后表面完整性及疲劳响应

低温加工由于其各种优点，包括提高加工部件的表面完整性，正在成为洪水加工的替代方案。此外，它是一种环保和清洁的解决方案，符合现代高性能行业的可持续发展目标。然而，为了使其被广泛采用，了解其对使用性能（如疲劳强度）的影响至关重要。在此背景下，本研究考察了低温加工对具有片层组织的变形Ti6Al4V合金疲劳强度的影响。在洪水和低温条件下进行了加工试验。随后，根据微观结构、硬度、残余应力和表面光洁度评估表面完整性。使用旋转弯曲配置进行疲劳试验，以评估加工引起的表面完整性改变的影响。结果表明，与洪水加工相比，低温加工略微提高了层状Ti6Al4V合金的疲劳寿命，显示了其作为一种可靠、环保和清洁的替代方案的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Procedia CIRP

CiteScore

3.80

自引率

0.00%

发文量