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Tool wear patterns when turning of titanium alloy using sustainable lubrication strategies
KTH, School of Industrial Engineering and Management (ITM), Production Engineering, Machine and Process Technology.
2014 (English)In: International Journal of Precision Engineering and Manufacturing, ISSN 2234-7593, Vol. 15, no 9, 1979-1985 p.Article in journal (Refereed) Published
Abstract [en]

A key area of research in sustainable machining is the search for environmentally benign cooling strategies. Vegetable oils have often been proposed as sustainable alternative to the conventional synthetic emulsion coolants. Techniques like dry and cryogenic machining, MQL and MQCL have also been proposed. The current study investigates the effect of six different strategies on the flank tool wear during turning of titanium Ti-6Al-4v using uncoated carbide tool at two levels of speed and feed. The mechanisms of tool wear are discussed. The use of rapeseed vegetable oil in MQL and MQCL configuration turns out to be an overall sustainable alternative at low feed and speed. Thus confirming the promise predicted in the use of vegetable oil as a lubricant for machining. At high speed and feed, cryogenic machining is more suitable for sustainable machining of Titanium.

Place, publisher, year, edition, pages
2014. Vol. 15, no 9, 1979-1985 p.
Keyword [en]
Sustainable machining, Titanium alloys, Lubrication, Cooling strategies, Tool wear
National Category
Mechanical Engineering
URN: urn:nbn:se:kth:diva-153854DOI: 10.1007/s12541-014-0554-zISI: 000341830500026ScopusID: 2-s2.0-84919918263OAI: diva2:754557

QC 20141010

Available from: 2014-10-10 Created: 2014-10-09 Last updated: 2015-09-15Bibliographically approved
In thesis
1. Numerical and Experimental Investigations of the Machinability of Ti6AI4V: Energy Efficiency and Sustainable Cooling/ Lubrication Strategies
Open this publication in new window or tab >>Numerical and Experimental Investigations of the Machinability of Ti6AI4V: Energy Efficiency and Sustainable Cooling/ Lubrication Strategies
2015 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Titanium alloys are widely utilized in the aerospace, biomedical,marine, petro-chemical and other demanding industries due to theirdurability, high fatigue resistance and ability to sustain elevateoperating temperature. As titanium alloys are difficult to machine, dueto which machining of these alloys ends up with higher environmentalburden. The industry is now embracing the sustainable philosophy inorder to reduce their carbon footprint. This means that the bestsustainable practices have to be used in machining of titanium alloys aswell as in an effort to reduce the carbon footprint and greenhouse gas(GHG) emissions.In this thesis, a better understanding towards the feasibility of shiftingfrom conventional (dry and flood) cooling techniques to the vegetableoil based minimum quantity cooling lubrication (MQCL) wasestablished. Machining performance of MQCL cooling strategies wasencouraging as in most cases the tool life was found close to floodstrategy or sometimes even better. The study revealed that theinfluence of the MQCL (Internal) application method on overallmachining performance was more evident at higher cutting speeds. Inaddition to the experimental machinability investigations, FiniteElement Modeling (FEM) and Computational Fluid Dynamic (CFD)Modeling was also employed to prediction of energy consumed inmachining and cutting temperature distribution on the cutting tool. Allnumerical results were found in close agreement to the experimentaldata. The contribution of the thesis should be of interest to those whowork in the areas of sustainable machining.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2015. xx, 136 p.
TRITA-IIP, ISSN 1650-1888 ; 15:07
Titanium alloys, Energy consumption, Wear mechanisms, Finite element analysis, computational fluid dynamic analysis
National Category
Production Engineering, Human Work Science and Ergonomics
Research subject
Production Engineering
urn:nbn:se:kth:diva-173594 (URN)978-91-7595-702-9 (ISBN)
Public defence
2015-10-01, Brinellsal M311, Brinellvägen 68, KTH, Stockholm, 10:00 (English)

QC 20150915

Available from: 2015-09-15 Created: 2015-09-15 Last updated: 2015-09-15Bibliographically approved

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Pervaiz, Salman
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