%0 Journal Article
%T Influences of laser powers on microstructure and properties of the coatings on the AZ91HP magnesium alloy<br>
%A Yali GAO
%A Dangsheng XIONG
%A Cunshan WANG
%A Yongzhe CHEN
%A <br>
%J 金属学报(英文版)
%D 2009
%I 
%X Al-Si alloy coatings were prepared on AZ91HP magnesium alloy by broad-beam laser cladding; the influences of the powers on the microstructure and properties of the coatings were discussed. It was found that the microstructure of the coatings at the powers of 3 and 3.5 kW was characterized by Mg2Si dendrites, and needle-like Mg2Al3 (hcp) dispersing in the Mg17Al12 matrix, whereas the coating at the power of 2.5 kW was composed of the petal-like Mg2Al3 (fcc) as well as the needle-like Mg2A13(hcp). The coating at the power of 4 kW appeared as α-Mg solid solution and Mg2Si,Mg17Al12, as well as Mg2Al3 (hcp). The coatings with the powers of 3 and 3.5 kW exhibited higher microhardness and better wear resistance because of more Mg2Si and Mg17Al12. However, the coating at the power of 2.5 kW displayed better corrosion resistance.
%K Magnesium alloy
%K AI-Si alloy
%K Laser cladding
%K Laser power<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=C19B08D052F5FD8445F4BB80A1A5D7BF&aid=6FB185DC3DA6955CB5F1DA5F20FB129E&yid=DE12191FBD62783C&vid=BC12EA701C895178&iid=38B194292C032A66&sid=ED01F5AE50BE09C0&eid=DABEF202280E7EF1&journal_id=1006-7191&journal_name=金属学报(英文版)&referenced_num=0&reference_num=11