Background: Minimum quantity lubrication (MQL) is one of the most promising machining
techniques that can yield a reduction in consumption of cutting fluid by more than 90 %
while ensuring the surface quality and tool life. The significance of the MQL in machining makes
it imperative to consolidate and analyse the current direction and status of research in MQL.
Objective: This study aims to assess global research publication trends and hot topics in the field of
MQL among machining processes. The bibliometric and descriptive analysis are the tools that the
investigation aims to use for the data analysis of related literature collected from Scopus databases.
Methods: Various performance parameters are extracted, such as document types and languages of
publication, annual scientific production, total documents, total citations, and citations per article.
The top 20 of the most relevant and productive sources, authors, affiliations, countries, word cloud,
and word dynamics are assessed. The graphical visualisation of the bibliometric data is presented
in terms of bibliographic coupling, citation, and co-citation network.
Results: The investigation reveals that the International Journal of Machine Tools and Manufacture
(2611 citations, 31 h-index) is the most productive journal that publishes on MQL. The most
productive institution is the University of Michigan (32 publications), the most cited country is
Germany (1879 citations), and the most productive country in MQL is China (124 publications).
The study shows that ‘Cryogenic Machining’, ‘Sustainable Machining’, ‘Sustainability’, ‘Nanofluid’
and ‘Titanium alloy’ are the most recent keywords and indications of the hot topics and future
research directions in the MQL field.
Conclusion: The analysis finds that MQL is progressing in publications and emerging with issues
that are strongly associated with the research. This study is expected to help the researchers to find
the most current research areas through the author’s keywords and future research directions in
MQL and thereby expand their research interests.