Hole-making processes and their impacts on the microstructure and fatigue response of aircraft alloys
Hole-making processes and their impacts on the microstructure and fatigue response of aircraft alloys
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DOI：
10.1007/s00170-016-9850-3
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发表时间：
2018-02-01
影响因子：
3.4
通讯作者：
Jin, Yan
中科院分区：
文献类型：
--
作者：
Sun, Dan;Lemoine, Patrick;Jin, Yan
针对航空合金孔加工，对常规钻削和螺旋铣削进行了对比研究。阐述了这两种不同加工工艺对不同航空合金显微组织和疲劳性能的影响。结果表明，与螺旋铣削加工相比，常规钻削加工使两种合金发生了更严重的表面/亚表面塑性变形。螺旋铣削导致更长的试样疲劳寿命相比，传统的钻这两种合金。在所有加工条件下，Al 2024-T3的疲劳寿命显著长于Ti-6Al-4V。冷却剂的使用通常产生较少的损伤表面，并导致增强的疲劳性能的加工合金。此外，加工表面粗糙度已被研究，以进一步阐述不同的加工工艺的影响。
A comparative study on conventional drilling and helical milling has been reported under the context of aircraft alloy hole making. The impacts of these two different machining processes on the microstructures and the fatigue performance of different aircraft alloys have been elaborated. Results show that both alloys undergo more severe surface/subsurface plastic deformation under conventional drilling comparing to helical milling process. Helical milling leads to a longer coupon fatigue life compared to conventional drilling for both alloys. The fatigue life of Al 2024-T3 is significantly longer than that of Ti-6Al-4V under all machining conditions. The use of coolant generally produces less damaged surface and leads to enhanced fatigue performance of the machined alloys. In addition, the machined surface roughness has been studied to further elaborate the effects of different machining processes.