On the Role of Tool Tilt Angle on Friction Stir Welding of Aluminum Matrix Composites

被引:21
作者
Acharya, Uttam [1 ]
Roy, Barnik Saha [1 ]
Saha, Subhash Chandra [1 ]
机构
[1] Natl Inst Technol Agartala, Dept Mech Engn, Jirania 799046, Tripura W, India
关键词
Aluminium matrix composite (AMC); Friction stir welding (FSW); Tool tilt angle; Microstructure; Mechanical properties; MECHANICAL-PROPERTIES; MICROSTRUCTURE; PARAMETERS; WEAR; PROPERTY; TORQUE; JOINT;
D O I
10.1007/s12633-020-00405-5
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The current study investigates the influence of tool tilt angle (TTA) on the mechanical strength of friction stir welded aluminum matrix composite (AMC). Aerospace-grade AA6092/ 17.5 SiCp- T6 plates of 6 mm thickness have been welded at different TTA of 1 & x30a;, 2 & x30a; and 3 & x30a; with fixed tool rotational speed of 1000 rpm and tool traverse speed of 1 mm/s. A conical pin-shaped tool of H13 tool steel having a hardness of 56 HRC has been used with a tool dimension of 16 mm shoulder dia., 6 mm pin root dia., and 4 mm tool tip dia. In order to study the microhardness, tensile strength, fracture toughness and fracture behavior of the joint the weld bead appearance, macrostructure and microstructure have been investigated. Results show that with an increase in TTA, the excessive flashing has been occurred in the weld bead and also affects the ratio of shoulder influenced region and pin influenced region in the macrostructure. The presence of detrimental Al2O3 has been found inside the weld at TTA of 3 & x30a;. It has found that the mechanical property of the joint increases as TTA increases from 1 & x30a; to 2 & x30a; and thereafter it decreases. The fractographic analysis shows a mixed-mode of failure for all the samples except for the TTA of 3 & x30a; where it shows brittle failure. Overall the study suggests the implication of 1 & x30a; to 2 & x30a; TTA to get a sound weld of this particular type of AMC.
引用
收藏
页码:79 / 89
页数:11
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