Laser alloying: a tool to produce improved Al-Mo surface alloys

摘要

The production of Al-transition metal alloys by laser alloying requires the treatment to be carried out at low scanning speeds in order to dissolve the high melting point addition elements. This procedure results in alloys containing a significant number of defects and large primary intermetallic compound particles that reduce the treatment's usefulness. To overcome this problem a two-step laser processing technique was developed, consisting of a preparatory step, using long interaction times, followed by a structure-refinement step, using short interaction times. This concept was tested in the production of Al-(3.5-8.6 wt.