Residual Stress Analysis in Machining of a Near Beta Ti Alloy, Ti-5553 Under High Pressure Cooling and Lubrication

Year 2023, , 13 - 22, 20.01.2023

Lokman Yünlü

https://doi.org/10.47933/ijeir.1188705

Abstract

Ti-5553 (Ti–5Al–5Mo–5V–3Cr) one of the titanium alloys, is a recently developed near beta Titanium alloy, which is frequently used in the aerospace industry such as landing gear. When machining these superalloys, surface integrity can be affected by cutting and cooling conditions. An experimental study was conducted on Ti-5553, also known as beta-like titanium alloy, to understand the role of High Pressure Cooling and Lubrication conditions on surface integrity. In this study, high pressure coolant levels and other machining parameters (cutting speed, feed rate) were chosen as variable factors. These various levels were selected in different values and used in the tests to emphasize the relations of the accepted shear conditions from the effective data in the formation of residual stresses, which is also a parameter of the surface integrity. The results demonstrate the need to prepare coolant pressure levels to improve work surface integrity in such a material. In order to reveal the consistency of the coolant pressure values with other determined cutting parameters and the accuracy of choice, a relationship optimization has been tried to be explained.

Keywords

Residual Stress, Ti-5553 Alloy, High Pressure Cooling, Surface integrity

Yakın Beta Ti Alaşımı, Ti-5553'ün Yüksek Basınçlı Soğutma ve Yağlama Altında İşlenmesinde Kalıntı Gerilme Analizi

Abstract

Titanyum alaşımlarından biri olan Ti-5553 (Ti–5Al–5Mo–5V–3Cr), iniş takımı gibi havacılık endüstrisinde sıklıkla kullanılan, yakın zamanda geliştirilmiş betaya yakın bir Titanyum alaşımıdır. Bu süper alaşımları işlerken, yüzey bütünlüğü kesme ve soğutma koşullarından etkilenebilir. Yüksek Basınçlı Soğutma ve Yağlama koşullarının yüzey bütünlüğü üzerindeki rolünü anlamak için beta benzeri titanyum alaşımı olarak da bilinen Ti-5553 üzerinde deneysel bir çalışma yapılmıştır. Bu çalışmada, yüksek basınçlı kesme sıvısı seviyeleri ve diğer işleme parametreleri (kesme hızı, ilerleme hızı) değişken faktörler olarak seçilmiştir. Bu çeşitli seviyeler farklı değerlerde seçilmiş ve aynı zamanda yüzey bütünlüğünün bir parametresi olan artık gerilmelerin oluşumunda etkin verilerden kabul edilen kesme koşullarının ilişkilerini vurgulamak için deneylerde kullanılmıştır. Sonuçlar, böyle bir malzemede çalışma yüzeyi bütünlüğünü iyileştirmek için soğutma sıvısı basınç seviyelerinin hazırlanması gerektiğini göstermektedir. Soğutma sıvısı basınç değerlerinin belirlenen diğer kesme parametreleri ile tutarlılığını ve seçimin doğruluğunu ortaya koymak için bir ilişki optimizasyonu açıklanmaya çalışılmıştır.

Keywords

Ti-5553 Alaşım, Yüksek Basınçlı Soğutma, Yüzey bütünlüğü, Kalıntı Gerilme

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