Journal Article10.1016/J.IJMACHTOOLS.2010.11.003
Machining induced surface integrity in titanium and nickel alloys: A review
Durul Ulutan,Tuğrul Özel +1 more
1.1K
TL;DR: In this paper, the authors provide an overview of machining induced surface integrity in titanium and nickel alloys and conclude that further modeling studies are needed to create predictive physics-based models that is in good agreement with reliable experiments.
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Abstract: Titanium and nickel alloys represent a significant metal portion of the aircraft structural and engine components. When these critical structural components in aerospace industry are manufactured with the objective to reach high reliability levels, surface integrity is one of the most relevant parameters used for evaluating the quality of finish machined surfaces. The residual stresses and surface alteration (white etch layer and depth of work hardening) induced by machining of titanium alloys and nickel-based alloys are very critical due to safety and sustainability concerns. This review paper provides an overview of machining induced surface integrity in titanium and nickel alloys. There are many different types of surface integrity problems reported in literature, and among these, residual stresses, white layer and work hardening layers, as well as microstructural alterations can be studied in order to improve surface qualities of end products. Many parameters affect the surface quality of workpieces, and cutting speed, feed rate, depth of cut, tool geometry and preparation, tool wear, and workpiece properties are among the most important ones worth to investigate. Experimental and empirical studies as well as analytical and Finite Element modeling based approaches are offered in order to better understand machining induced surface integrity. In the current state-of-the-art however, a comprehensive and systematic modeling approach based on the process physics and applicable to the industrial processes is still missing. It is concluded that further modeling studies are needed to create predictive physics-based models that is in good agreement with reliable experiments, while explaining the effects of many parameters, for machining of titanium alloys and nickel-based alloys.
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Citations
Finite element simulation of machining Inconel 718 alloy including microstructure changes
Farshid Jafarian,Farshid Jafarian,M. Imaz Ciaran,Domenico Umbrello,Pedro José Arrazola,Luigino Filice,Hossein Amirabadi +6 more
TL;DR: In this paper, a finite element (FE) model for orthogonal machining of Inconel 718 alloy and prediction of the microstructure changes during the process is presented.
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Analysis of the evolution of the Built-Up Edge and Built-Up Layer formation mechanisms in the dry turning of aeronautical aluminium alloys
TL;DR: In this paper, a study of the BUL and BUE formation mechanisms, their evolution and their influence on the dry turned aeronautical workpieces surface quality has been achieved.
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Investigation of tool wear in the turning of Inconel 718 superalloy in terms of process performance and productivity enhancement
TL;DR: In this article, three cutting tools coated with heat isolating TiAlN/AlTiN layers with different stoichiometry ratios recommended as specially designed cutting tools for aerospace industry applications are tested.
169
Prediction of machining induced residual stresses in turning of titanium and nickel based alloys with experiments and finite element simulations
Tuğrul Özel,Durul Ulutan +1 more
TL;DR: In this article, the feasibility and limitations of predicting machining induced residual stresses by using viscoplastic finite element simulations and temperature-dependent flow softening constitutive material modeling are investigated.
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Laser-based directed energy deposition (DED-LB) of advanced materials
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TL;DR: Directed energy deposition (DED) has matured into an essential additive manufacturing branch as discussed by the authors and has been broadly implemented in the design and fabrication of novel materials, including metals, ceramics, and composites.
164
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