Mechanical Properties of Friction‐Stir Welded Titanium Joint

Research on the friction stir welding of Titanium Grade 1

“…Softening of joint in this zone is causes by grain growth of undeformed material. The reason of HAZ absence in the titanium joints compared to the aluminium results from the lower thermal conductivity of titanium, as well as, its higher melting point, which determines the temperature of grain growth [23,24]. In the performed FSW joints, the two kinds of defects occurrence have been stated.…”

Friction stir welding of pure titanium lap joint

“…[5][6][7][8][9][10][11] In recent years, a great deal of attention has been focused on the FSW of high melting metals with the continued development of FSW technique, [12][13][14][15][16] especially for titanium and its alloys because of the wide application in the industrial field. [17][18][19][20][21][22][23][24][25][26] However, it should be pointed out that it is extraordinarily arduous to friction stir weld the titanium and its alloys owing to the high activity, high melting point and low heat diffusivity. Fortunately, a large number of researches have been performed, including the microstructural characteristics, [17][18][19]21 the mechanical properties, 20,25,26 the material flow and the grain structure evolution.…”

“…[17][18][19][20][21][22][23][24][25][26] However, it should be pointed out that it is extraordinarily arduous to friction stir weld the titanium and its alloys owing to the high activity, high melting point and low heat diffusivity. Fortunately, a large number of researches have been performed, including the microstructural characteristics, [17][18][19]21 the mechanical properties, 20,25,26 the material flow and the grain structure evolution. [22][23][24] The published papers have mainly concentrated on the butt joint of titanium and its alloys, but little work has reported the FSW of lap joint.…”