The wide application of light alloys such as magnesium and titanium in industry is closely related to the connection of their heterogeneous structures. As a widely used type of solid-phase welding, ultrasonic spot welding is an effective way to achieve connection of high strength materials. Ultrasonic welding is carried out on magnesium-titanium dissimilar metals to investigate the influences of welding parameters on the joint's tensile property and fatigue property. The analysis of range and variance are adopted to study the effect weights of the welding parameter and interactions between parameters. The fatigue test and Paris model are adopted to study the influences of welding parameters on the fatigue property. Results showed that, in the ultrasonic welding of magnesium and titanium, clamping force is the most significant factor, followed by vibration time and vibration amplitude; in addition, the interactions between vibration time and vibration amplitude, the interactions between vibration amplitude and clamping force also significantly impact the tensile strength. The highest strength can reach 3 762 N. The different cycle number leads to the different failure mode in fatigue test. The higher welding parameters leaded to the lower fatigue life when the welded joint reached higher joint strength. The clamping force significantly impact the fatigue property.
ZHAO Dewang
,
REN Daxin
,
ZHAO Kunmin
,
GUO Xinglin
,
YANG Wenping
. Effect of Welding Parameters on Tensile and Fatigue Properties of Ultrasonic Spot Welded Dissimilar Joints of Magnesium to Titanium Sheets[J]. Journal of Mechanical Engineering, 2017
, 53(24)
: 118
-125
.
DOI: 10.3901/JME.2017.24.118
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