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      A New Cutting Tool Design for Cryogenic Machining of Ti–6Al–4V Titanium Alloy

      research-article
      1 , * , 1
      Materials
      MDPI
      cryogenic machining, cutting tool, cutting geometry, titanium

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          Abstract

          Titanium alloys are extensively used in aerospace and medical industries. About 15% of modern civil aircrafts are made from titanium alloys. Ti–6Al–4V, the most used titanium alloy, is widely considered a difficult-to-machine material due to short tool life, poor surface integrity, and low productivity during machining. Cryogenic machining using liquid nitrogen (LN 2) has shown promising advantages in increasing tool life and material removal rate whilst improving surface integrity. However, to date, there is no study on cutting tool geometry and its performance relationship in cryogenic machining. This paper presents the first investigation on various cutting tool geometries for cryogenic end milling of Ti–6Al–4V alloy. The investigations revealed that a 14° rake angle and a 10° primary clearance angle are the most suitable geometries for cryogenic machining. The effect of cutting speed on tool life was also studied. The analysis indicated that 110 m/min cutting speed yields the longest tool life of 91 min whilst allowing for up to 83% increased productivity when machining Ti–6Al–4V. Overall the research shows significant impact in machining performance of Ti–6Al–4V with much higher material removal rate.

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          An overview of the machinability of aeroengine alloys

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            Cryogenic and minimum quantity lubrication for an eco-efficiency turning of AISI 304

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                Author and article information

                Journal
                Materials (Basel)
                Materials (Basel)
                materials
                Materials
                MDPI
                1996-1944
                04 February 2019
                February 2019
                : 12
                : 3
                : 477
                Affiliations
                Department of Mechanical Engineering, University of Bath, BA2 7AY Bath, UK; s.t.newman@ 123456bath.ac.uk
                Author notes
                [* ]Correspondence: a.shokrani@ 123456bath.ac.uk ; Tel.: +44-1225-38-6588
                Article
                materials-12-00477
                10.3390/ma12030477
                6385146
                30720742
                3eed6df0-03ef-4e73-9880-c8fd43b51e4a
                © 2019 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                : 03 January 2019
                : 31 January 2019
                Categories
                Article

                cryogenic machining,cutting tool,cutting geometry,titanium

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