Effect of ultrasonic vibration of molten pool on microstructure and mechanical properties of Ti-6Al-4V joints prepared via CMT + P welding

2020 ◽  
Vol 52 ◽  
pp. 193-202 ◽  
Author(s):  
Guancheng Zhao ◽  
Zhijiang Wang ◽  
Shengsun Hu ◽  
Shihua Duan ◽  
Youquan Chen
Keyword(s):  
Mechanical Properties ◽  
Ultrasonic Vibration ◽  
Molten Pool ◽  
Microstructure And Mechanical Properties

Role of molten pool mode on formability, microstructure and mechanical properties of selective laser melted Ti-6Al-4V alloy

2016 ◽  
Vol 110 ◽  
pp. 558-570 ◽  
Author(s):  
Jingjing Yang ◽  
Jie Han ◽  
Hanchen Yu ◽  
Jie Yin ◽  
Ming Gao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Molten Pool ◽  
Microstructure And Mechanical Properties

scholarly journals Microstructure and Mechanical Properties of Al-12Si Alloys Fabricated by Ultrasonic-Assisted Laser Metal Deposition

Materials ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 126 ◽  
Author(s):  
Yang Zhang ◽  
Yuqi Guo ◽  
Yan Chen ◽  
Yabin Cao ◽  
Haibo Qi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Properties ◽  
Ultrasonic Vibration ◽  
Molten Pool ◽  
Maximum Size ◽  
Metal Deposition ◽  
Ultrasonic Power ◽  
Laser Metal Deposition ◽  
Ultrasonic Assisted ◽  
Metallographic Observation

This paper presents a method of ultrasonic-assisted laser metal deposition of Al-12Si alloy. The effects of the ultrasonic power and remelting treatment on the development of porosity, microstructural evolution, and tensile properties of the deposits were investigated. The results suggested that a combination of an ultrasonic vibration and remelting treatment could prolong the existence of the molten pool and the effect of the ultrasound. Therefore, the density of the samples increased from 95.4% to 99.1% compared to the as-prepared samples. The ultrasonic action in the molten pool could not only increase the density of the samples but also refine the grains and improve the tensile properties of the samples. Metallographic observation showed that the maximum size of the primary α-Al dendrites were refined from 277.5 µm to 87.5 µm. The ultimate tensile strength and elongation of the remelting treatment samples with ultrasonic vibration were ~227 ± 3 MPa and 12.2% ± 1.4%, respectively, which were approximately 1.17 and 1.53 times those of the as-prepared samples, respectively. According to the tensile properties and fracture analysis, the density increase dominated the improvement of the mechanical properties.

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