Study on Properties of Fe-30Mn-xCu Alloy Prepared by Laser Cladding

Abstract

In order to further explore the degradation behavior of degradable metal iron-manganese alloys for bone implants， laser cladding technology was used to prepare Fe-30Mn-xCu (x ＝0， 4%， 6%， 8%， 10%， 12%， mass fraction， the same below) biodegradable bone replacement alloy.The effects of changes in copper content on the microstructure， mechanical properties and biodegradation behavior of the alloy were discussed through optical microscopes， scanning electron microscopes and their accompanying energy spectrometers， X-ray diffractometers， microhardness testers， electronic universal testing machines， high-temperature friction and wear testers and electrochemical workstations，etc.Results showed that the copper content had greater effects on the alloy’s grain size， hardness， strength， friction and wear properties， and degradation rate.When Cu content increased， the grain size decreased， the hardness and the ultimate compressive strength increased， the wear resistance and biodegradation rate firstly increased and then decreased.Moreover， the alloy prepared with 10%Cu had the best wear resistance， and the allow with 6%Cu possessed the maximum biodegradation rate.

Keywords

• laser cladding|fe-30mn-xcu alloy|microstructure|mechanical properties|biodegradation behavior