Structural and chemical characterization of the hardening phase in biodegradable Fe–Mn–Pd maraging steels

Abstract

Fe-Mn-Pd alloys are promising candidates as biodegradable material for use in temporary implant applications. In this study, the hardening phase of Fe-rich martensitic alloys containing 1, 3, and 6 wt.% Pd and a fixed Mn content of 10 wt.% was investigated. All of these alloys show considerable age-hardening upon isothermal aging at 500°C, exhibiting a behavior characteristic of maraging steels. Atom probe tomography (APT) and x-ray diffraction (XRD) measurements were performed to characterize the composition and crystallography of nanometer-sized precipitates forming in the overaged region of the Fe-Mn-Pd alloys. The precipitates consist mainly of Mn and Pd and the peaks of the intermetallic particles observed in the XRD spectra can be ascribed to the face-centered tetragonal b 1 -MnPd phase. The precipitation sequence for Fe-Mn-Pd is revealed to be similar to that reported for Fe-Mn-Ni and Fe-Mn-Pt maraging steels.

Embrittlement Fracture Behavior and Mechanical Properties in Heat-Affected Zone of Welded Maraging Steel

“…Over the past decade, metal additive manufacturing techniques, notably direct energy deposition and selective laser melting, have been employed to produce maraging steel components [26][27][28][29][30][31][32]. Additionally, ongoing research efforts in the metal manufacturing industry and academia, including precipitate analysis via transmission electron microscopy (TEM) [33][34][35][36] and atom probe tomography [37,38], as well as first-principle calculations and molecular dynamics studies, aim to enhance the RT strength and fatigue properties of maraging steels.…”

Fabrication of strong bioresorbable composites from electroexplosive Fe-Fe3O4 nanoparticles by isostatic pressing followed by vacuum sintering

“…The Fe-10Mn-1Pd alloy with high mechanical properties was obtained using additional thermomechanical treatments [ 13 ]. After casting and quenching, isothermal aging and quenching were applied [ 14 ].…”