Record number :
1068925
Title of article :
Effect of rotation speed on microstructure and mechanical properties of Ti–6Al–4V friction stir welded joints
Author/Authors :
L. Zhou، نويسنده , , H.J. Liu، نويسنده , , Q.W. Liu، نويسنده ,
Issue Information :
ماهنامه با شماره پیاپی سال 2010
Pages :
6
From page :
2631
To page :
2636
Abstract :
The effect of tool rotation speed on microstructure and mechanical properties of friction stir welded joints was investigated for Ti–6Al–4V titanium alloy. Joints were produced by employing rotation speeds ranging from 400 to 600 rpm at a constant welding speed of 75 mm/min. It was found that rotation speed had a significant impact on microstructure and mechanical properties of the joints. A bimodal microstructure or a full lamellar microstructure could be developed in the weld zone depending on the rotation speeds used, while the microstructure in the heat affected zone was almost not influenced by rotation speed. The hardness in the weld zone was lower than that in the base material, and decreased with increasing rotation speed. Results of transverse tensile test indicated that all the joints exhibited lower tensile strength than the base material and the tensile strength of the joints decreased with increasing rotation speed.
Keywords :
Microstructure , Rotation speed , Titanium alloy , Mechanical properties , Friction stir welding
Journal title :
Materials and Design
Link To Document :