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WEI Shouzheng, LI Yajiang, WANG Juan, ZHANG Pengfei. Microstructure characteristics of RuTi/1060Al fusion-brazed joint by pulsed gas metal arc welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2014, 35(4): 63-66.
Citation: WEI Shouzheng, LI Yajiang, WANG Juan, ZHANG Pengfei. Microstructure characteristics of RuTi/1060Al fusion-brazed joint by pulsed gas metal arc welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2014, 35(4): 63-66.
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Microstructure characteristics of RuTi/1060Al fusion-brazed joint by pulsed gas metal arc welding

  • Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials(Ministry of Education), Shandong University, Jinan 250061, China

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  • Received Date: December 19, 2012
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  • Pulsed gas metal arc welding of RuTi titanium alloy to 1060 aluminum was conducted. The microstructure in weld zone of RuTi Ti/1060Al joint was examined by scanning electron microscope (SEM) fitted with energy-dispersive spectrometer (EDS). Elemental distribution and precipitated phase in weld zone and transition region on Ti alloy side were analyzed by EDS. The weld zone was composed of α-Al dendrites and eutectic α-Al+Si structures. The eutectic α-Al+Si structures distributed along the boundaries of α-Al dendrites. Striped or block Ti(Al,Si)3 intermetallics appeared in the weld zone. A serrated transition region mainly containing Ti(Al,Si)3 intermetallics was formed between the RuTi titanium alloy and the weld zone. The width of the Ti/Al transition region was less than 10 μm. With the increasing of welding heat input,the Ti/Al transition region presented a rod-like appearance. The heat-affected zone (HAZ) of RuTi titanium alloy consisted of acicular α″ and lath α' martensite. The average microhardness in the HAZ was about 2.16-2.65 GPa.
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