%0 Journal Article
%T Optimizing the Pulsed Current Gas Tungsten Arc WeldingParameters<br>Optimizing the Pulsed Current Gas Tungsten Arc Welding Parameters
%A MBalasubramanian
%A VJayabalan
%A VBalasubramanian
%A <br>M.Balasubramanian
%A V.Jayabalan
%A V.Balasubramanian
%J 材料科学技术学报
%D 2006
%I 
%X The selection of process parameter in the gas tungsten arc (GTA) welding of titanium alloy was presented for obtaining optimum grain size and hardness. Titanium alloy (Ti-6Al-4V) is one of the most important non-ferrous metals which offers great potential application in aerospace, biomedical and chemical industries,because of its low density (4.5 g/cm3), excellent corrosion resistance, high strength, attractive fracture behaviour and high melting point (1678℃). The preferred welding process for titanium alloy is frequent GTA welding due to its comparatively easier applicability and better economy. In the case of single pass (GTA)welding of thinner section of this alloy, the pulsed current has been found beneficial due to its advantages over the conventional continuous current process. Many considerations come into the picture and one needs to carefully balance various pulse current parameters to reach an optimum combination. Four factors, five level, central composite, rotatable design matrix were used to optimize the required number of experimental conditions. Mathematical models were developed to predict the fusion zone grain size using analysis of variance (ANOVA) and regression analysis. The developed models were optimized using the traditional Hooke and Jeeve's algorithm. Experimental results were provided to illustrate the proposed approach.
%K Pulsed current
%K Gas tungsten arc welding
%K Titanium alloy
%K Design of experiments
%K ANOVA
%K Hooke and Jeeve's algorithm
%K Grain size
%K Hardness<br>钨电极惰性气体保护焊
%K 脉动电流
%K 钛合金
%K 结晶粒度
%K 硬度
%K 最优化
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=324DC3CAB22330DB19158AE0A9B7BFA5&aid=A6A43D8EA7D537935D14D9116252F869&yid=37904DC365DD7266&vid=BC12EA701C895178&iid=B31275AF3241DB2D&sid=08F83145FA367D52&eid=95780E43ADDDE2AA&journal_id=1005-0302&journal_name=材料科学技术学报&referenced_num=2&reference_num=15