Research developments and technological advancements in conventional and non-conventional machining of superalloys – a review

This article presents a detailed systematic review on the current developments in the machining of superalloys. Superalloys have extensive high temperature applications and research has been conducted in various machining processes. The conventional and nonconventional processing of superalloys is an emerging research area and needs attention. This systematic literature survey intends to consolidate, review, and critically highlight the machining aspects carried out in this field. Bibliometric analysis using BibExcel is conducted to capture new insights in the focused field of research. Articles published since 1991 on material processing of superalloys are listed and referenced. Article statistics on each class of publications have been highlighted. A citation analysis is also reported and the articles with the highest impact are identified. Geographical mapping reveals the role of universities and institutions in the focused research. Gephi is used to identify the key research clusters and topics. Seven prominent clusters were identified and articles in each research cluster have been elaborated. A quality versus quantity analysis of the various publications is done. Present state of art in the focused research and the future directions on the material processing of superalloys based on the review are reported.