Fang Xuewei, Zhang Lijuan, Chen Guopeng, Dang Xiaofeng, Huang Ke, Wang Lei, Lu Bingheng
The State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, No. 99 Yan Cheung Road, Xi'an 710054, China.
National Innovation Institute of Additive Manufacturing, Buiding A, Door of Metropolis, Jinye Road, Gaoxin District, Xi'an 710065, China.
Materials (Basel). 2018 Oct 24;11(11):2075. doi: 10.3390/ma11112075.
The effect of arc modes on the microstructure and tensile properties of 5183 aluminium alloy fabricated by cold metal transfer (CMT) processes has been thoroughly investigated. Heat inputs of CMT processes with three arc modes, i.e., CMT, CMT advance (CMT+A), and CMT pulse (CMT+P), were quantified, and their influence on the formation of pores were investigated. The highest tensile strength was found from samples built by the CMT+A process. This agrees well with their smallest average pore sizes. Average tensile strengths of CMT+A arc mode-built samples were 296.9 MPa and 291.8 MPa along the horizontal and vertical directions, respectively. The difference of tensile strength along the horizontal and vertical directions of the CMT+P and CMT samples was mainly caused by the pores at the interfaces between each deposited layer. The successfully built large 5183 aluminium parts by the CMT+A arc mode further proves that this arc mode is a suitable mode for manufacturing of 5183 aluminium alloy.
电弧模式对采用冷金属过渡(CMT)工艺制备的5183铝合金微观结构和拉伸性能的影响已得到深入研究。对CMT、CMT前进模式(CMT+A)和CMT脉冲模式(CMT+P)这三种电弧模式下CMT工艺的热输入进行了量化,并研究了它们对气孔形成的影响。CMT+A工艺制备的样品具有最高的拉伸强度。这与它们最小的平均气孔尺寸非常吻合。CMT+A电弧模式制备的样品沿水平和垂直方向的平均拉伸强度分别为296.9MPa和291.8MPa。CMT+P和CMT样品沿水平和垂直方向拉伸强度的差异主要是由各沉积层界面处的气孔造成的。通过CMT+A电弧模式成功制备出大型5183铝合金部件,进一步证明了该电弧模式是制造5183铝合金的合适模式。