%0 Journal Article
%T THE EFFECT OF BORON AND CARBON ADDITION ON WELDABILITY OF DS TMS-75 SUPERALLOY
%A MCChaturvedi
%A YLWANG
%A NLRichards
%A <br>M.C.Chaturvedi
%A Y.L.Wang
%A N.L.Richards
%J 金属学报(英文版)
%D 2005
%I 
%X Four alloys TMS-75 (Base), Base+B, Base+C and TMD-103 (Base+B+C) with varying levels of B, C were directionally solidified (DS), and their weldability was investigated by bead-onplate electron beam welding.It was found that cracking occurred in the weld-metal, as well as in the heat affected zone (HAZ).Both γ/γ' and/or γ/carbide eutectic contributed to the weld-metal cracking, and the γ/γ' eutectic was found to be mainly responsible for cracking in HAZ However, constitutional liquation of carbides seems to have made some contribution also.The B addition had a detrimental effect on HAZ cracking susceptibility, while C addition improved it appreciably even in the presence of B.In addition, no obvious differences were observed in cracking susceptibility of weld-metal in the four alloys.The cracking modes and mechanisms underlying the effect of B and C addition on weldability could be explained on the basis of microstructures of the four alloys.
%K Ni-based superalloy
%K low melting point constituents
%K liquation cracking<br>镍超合金
%K 低熔融点成分
%K 熔析裂缝
%K 焊接处理
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=C19B08D052F5FD8445F4BB80A1A5D7BF&aid=24819FDE7BDD65B3494CE40FA9D98D95&yid=2DD7160C83D0ACED&vid=13553B2D12F347E8&iid=CA4FD0336C81A37A&sid=B91E8C6D6FE990DB&eid=9971A5E270697F23&journal_id=1006-7191&journal_name=金属学报(英文版)&referenced_num=0&reference_num=12