MICROSTRUCTURE AND MECHANICAL AND TRIBOLOGICAL PROPERTIES OF A LUBRICANT COATING FOR INCREMENTAL FORMING OF A TI SHEET

Editorial

10.22099/ijstm.2014.2505

Abstract

Due to galling with other materials, Ti and its alloys call for solid lubricants during
forming. Deforming Ti sheet becomes even more difficult when the forming process involves very
low contact area, such as in the novel process single point incremental forming (SPIF). Retaining
lubricant at the tool/sheet interface while performing local deformation, as in SPIF, has always
been a challenge. One way to satisfy this challenge is to develop a porous surface coating on the
sheet and fill its pores with lubricant particles. For SPIF, an electro-chemical deposition process
called micro-arc oxidation (MAO) has shown promise to fabricate coatings of desired pore size
and thickness to fulfill the said objective. In the present work, the characterization of an MAO
coating has been carried out to clarify its role during the incremental forming of pure Ti sheet. The
results regarding hardness, bond strength, XRD microstructure and friction co-efficient of the
coating under various lubrication conditions are reported.

Keywords

Iranian Journal of Science and Technology Transactions of Mechanical Engineering
Volume 38, M2
October 2014
Pages 423-429

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