Influence of cryogenic reaming process parameters on titanium alloy by using Grey relational analysis (original) (raw)
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Materials Today: Proceedings, 2018
The research on cryogenic processing of cutting tools has led to the implementation of the treatment in industrial applications.The application of cryogenic to age hardenablealuminium alloy in a proper sequence is a complex issue as they are sensitive to temperature and time due to 'aging', this work comprises cryogenic treatment of 7075 aluminium alloy, with effect of soaking period on this alloy was assessed in term of surface quality for hardness and surface roughness using design of experiments by Taguchi and optimization by gray relational analysis. The work concludes by identifying the effect of cryogenic processing and optimizing the treatment parameters for getting best combination of hardness and surface roughness after the processing.
A CRITICAL REVIEW ON CRYOGENIC MACHINING OF TITANIUM ALLOY (TI-6AL-4V)
The alloys of Nickel, Cobal Titanium, Tungsten belongs to the group of super hard alloys, among them Titanium is one of the fastest growing materials used in aerospace applications. The prime rationale for designers to choose titanium in their designs is its relative low mass for a given strength level and its relative resistance to high temperature. Titanium has long been used in aircraft engine front sections and will continue to be used there for the foreseeable future. In fact, due to its properties, titanium alloys are becoming more prevalent than ever before in structural and landing gear components. One drawback of these alloys is their poor mach inability .Titanium alloy Ti-6Al-4V, a difficult-to-machine material having extremely short tool life. To overcome this problem, advanced techniques are being practiced in machining of titanium alloy, one such technique is cryogenic cooling. Nitrogen is more preferable in machining to dissipate heat generated because it is cost effective, safe, non flammable and environmental friendly gas, in addition to that it cannot contaminate work piece, no separate mechanism for disposal .A review is undertaken in this paper for the machining of titanium alloys in cryogenic conditions.
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