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YUAN Tao1, CHEN Shujun1, LUO Zhen2, ZHANG Yu2. A grain refining method of Al alloy welds with ultrasonic stirring[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(5): 21-24. DOI: 10.12073/j.hjxb.2018390114
Citation: YUAN Tao1, CHEN Shujun1, LUO Zhen2, ZHANG Yu2. A grain refining method of Al alloy welds with ultrasonic stirring[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(5): 21-24. DOI: 10.12073/j.hjxb.2018390114

A grain refining method of Al alloy welds with ultrasonic stirring

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  • Received Date: November 04, 2016
  • The mechanical properties and the solidification cracking resistance of the weld could be improved by grain refining. The grain refining method with ultrasonic vibration of workpiece was difficult when the workpiece is clamped down tightly to a rigid fixture or connected to a rigid structure. A new grain refining method with ultrasonic energy was designed, i.e., dipping an ultrasonic probe in the weld pool to stir it at a distance behind the arc. The results show that, this new approach produced effective grain refining in arc welds of 6061Al. Grain refining area increased with the ultrasonic amplitude increasing while the welding speed didn't affect the grain size effectively. Meanwhile, the grain refining of 6061Al welds were achieved with the combination effect of heterogeneous nucleation and dendrite fragmentation.
  • Kou S. Welding metallurgy[M]. Second ed. John Wiley, Hoboken, New Jersey, 2003.[2] Dai W. Effect of high-intensity ultrasonic-wave emission on the weldability of aluminum alloy 7075-T6[J]. Materials Letters, 2003, 57: 2447-2454.[3] Qian M, Ramirez A, Das A,et al. The effect of the solute on ultrasonic grain refinement of magnesium alloys[J]. Journal of Crystal Growth, 2010, 312: 2267-2272.[4] Abramov V, Abramov O, Bulgakov V,et al. Solidification of aluminum alloys under ultrasonic irradiation using water-cooled resonator[J]. Materials Letter, 1998, 37: 27-34.[5] Li J, Momono T, Fu Y,et al. Effect of ultrasonic stirring on temperature distribution and grain refinement in Al-1.65%Si alloy melt[J]. Transactions of Nonferrous Metals Society of China, 2007, 17: 691-697.[6] Liu X, Osawa Y, Takamori S,et al. Grain refinement of AZ91 alloy by introducing ultrasonic vibration during solidification[J]. Materials Letters, 2008, 62: 2872-2875.[7] Ramirez A, Qian M, Davis B,et al. Potency of high-intensity ultrasonic treatment for grain refinement of magnesium alloys[J]. Scripta Materialia, 2008, 59: 19-22.[8] Shu D, Sun B, Mi J,et al. A high-speed imaging and modeling study of dendrite fragmentation caused by ultrasonic cavitation[J]. Metallurgical and Materials Transactions A, 2012, 43A: 3755-3765.[9] ASTM E112-12. Standard test methods for determining average grain size[S]. West Conshohocken, PA, ASTM International, 2004.[10] StJohn D. H, Easton M A, Qian M,et al. Grain refinement of magnesium alloys: a review of recent research, theoretical developments, and their application[J]. Metallurgical and Materials Transactions A, 2013, 44A: 2935-2949.

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