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Indexed by:期刊论文

Date of Publication:2009-10-01

Journal:TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS

Included Journals:SCIE

Volume:62

Issue:4-5

Page Number:485-487

ISSN No.:0019-493X

Key Words:high current pulsed electron beam; magnesium alloy; AZ91; wear resistance

Abstract:Surface modification of magnesium alloy AZ91 by high current pulsed electron beam (HCPEB) was investigated in the present work. After irradiated by HCPEB, crater-like defects were found scattering on the modified surface, when increasing pulse number, the density of craters sharply reduced. According to XRD analysis, hard intermetallic phase Mg(17)Al(12) would appear after several pulse of HCPEB treatment that is accordance with the improvement of wear resistance, but more pulses will lead to the solution of Mg(17)Al(12) phase. Ultimately, due to the thickest depth of modified layer, sample treated with 30 pulses and accelerating voltage of 27 kV exhibited the best wear resistance, the depth of wear track decreased from 12.75 mu m in initial state to 7.82 mu m.