Assessment of the Wear of a Repeatedly Disassembled Interference-Fit Joint Operating under Rotational Bending Conditions

The purpose of the investigations was to assess influence repeated sleeve assembly on wear forced-in joint elements. test methodology assumed operating a in rotational bending conditions, dismantling after every thousand fatigue cycles, and then reassembling. total number cycles 106, or as many needed for cracking. macroscopic observations shaft surface demonstrated traces fretting form randomly spaced grey dark brown stains at axle seat circumference close edge. size would increase with cycles. top layer also depended sleeve/shaft processes. microscopic confirmed wear, which developed surface. Numerous instances microabrasion well micropullouts scratches were observed. Material build-ups observed, crack migrate. chemical analysis composition products presence iron oxygen atoms, confirms oxidation products. measurement maximum force remove from next cycle showed need use greater each time; however, smaller press onto shaft. As result development shafts become fatigue-worn 3.6 × 106