Wear behavior of a multiphase ductile iron produced by quenching and partitioning process

•Wear behavior of a multiphase ductile iron designed by Q&PBM is investigated.•Q&PBM is a process of quenching and partitioning below Ms developed by us.•Bainitic ferrite (BF) and film retained austenite (RA) deform readily under wear.•Prior martensite (PM) remains unchanged but deflects with (BF + RA)nano deforming.•A complex strengthening and toughening effect of multiphase is found during wear.