Machining of Al-Cu and Al-Zn Alloys for Aeronautical Components

Abstract

Machining operations are chosen by aircraft manufacturers worldwide to process light aluminum alloys. This type of materials presents good characteristics in terms of weight and physicochemical properties, which combined with a low cost ratio making them irreplaceable in aircraft elements with a high structural commitment. Conventional machining processes such as drilling, milling and turning are widely used for aeronautical parts manufacturing. High quality requirements are usually demanded for these kinds of components but aluminum alloys may present some machinability issues, basically associated to the heat generated during the process. Among others, surface quality and geometrical deviations are highly influenced by the condition of the cutting-tool, its wear and the cutting parameters. Consequently, the understanding of the relationship among the process parameters, the quality features and the main wear mechanism is a key factor for the improvement in the productivity. In this chapter, the fundamental issues of drilling, milling and turning are addressed, dealing with the relationship between cutting parameters, wear phenomena and micro and macro geometrical deviations.

Influence of Solidification Parameters and Solute Content on the Machinability of Two Lead-Free Babbit Metals

“…In all these applications, during the manufacturing process of the components, they will be machined at least once. In this way, the study of the characteristics that result in better behavior of the material during the machining process (machinability) is of fundamental importance [15][16][17][18][19], although, due to several variables involved in the processing of materials, it is not possible to establish a single process or condition that results in better machinability. In this sense, the formation of a database with experimental results under different conditions reduces the risk of errors during the processing of the material.…”