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ZHANG Jing, FENG Xiaosong, XU Hui, GAO Jiashuang. Mechanical properties and microstructures of laser coaxially assisted friction stir welded 2219-T6 aluminum alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(8): 82-86. DOI: 10.12073/j.hjxb.2018390206
Citation: ZHANG Jing, FENG Xiaosong, XU Hui, GAO Jiashuang. Mechanical properties and microstructures of laser coaxially assisted friction stir welded 2219-T6 aluminum alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(8): 82-86. DOI: 10.12073/j.hjxb.2018390206
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Mechanical properties and microstructures of laser coaxially assisted friction stir welded 2219-T6 aluminum alloy

  • Shanghai Aerospace Equipments Manufacturer, Shanghai 200245, China

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  • Received Date: February 18, 2017
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  • Laser coaxially assisted friction stir welding process of 2219-T6 aluminum alloy was investigated, concentrating on weld appearance, mechanical properties and microstructure characteristics of the joints. The results show that assisted laser heat can effectively prevent tunnel defect, thus improving joint performance. However, high laser power increases softening of the welded zone and decreases joint performance. Assisted laser heat enlarges the nugget zone (NZ) and increases the size of θ phase (Al2Cu), but has no obvious effect on microstructures of thermo-mechanically affected zone(TMAZ). T6 heat treatment of the welded joints can obviously increase the joint strength (from 76% of base metal to 100%). The grain sizes in NZ and TMAZ of joints with assisted laser heat are smaller than those without assisted laser after heat treatment.
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    • References (11)
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