Effect of Tool Pin Geometry and Process Parameters During FSW of Dissimilar Alloys of Mg

Yaknesh, S.; Sampathkumar, K.; Sevvel, P.

doi:10.1590/1980-5373-mr-2021-0508

Cited by 11 publications

(4 citation statements)

References 44 publications

(55 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A tool with a pentagonal pin profile was used in welding applications, Figure 2b. In friction stir welding processes, the choice of tool pin geometry affects the mechanical properties [25], and on the other hand, the ratio of the tool shoulder diameter to the plate thickness should be taken into account [26]. In this study, a pentagonal-profiled pin was selected; notably, the ratio of the tool shoulder diameter to the plate thickness was constant.…”

Section: Methodsmentioning

confidence: 99%

Effects of parameters on friction stir welding process of AA 7075 aluminum alloy: mechanical and microstructural assessments

Ozan

Şahin

Kasman

2022

Materialwissenschaft Werkst

View full text Add to dashboard Cite

The effect of tool rotation speed and welding speed on the microstructural and mechanical properties of AA 7075-T651 welded plates produced using friction stir welding is the research subject of this study. A basin-shaped stir zone characterized all friction stir welded joints' microstructures. The fracture location following the tensile test was found to be outside the stir zone for each welded joint. All welded joints were subjected to a 90°root bending test. The tests were terminated before each welded joint could reach the 90°bend angle in the stir zone. The stir zone of each welded joint was characterized by the fine and equiaxed grains with the effect of dynamic recrystallization. In addition, intermetallic particles were also detected to occur in the weld joint. Among the nine welded joints, the welded joint with the highest ultimate tensile strength of 382 MPa was produced with a tool rotation speed of 400 min À 1 and a welding speed of 80 mm min À 1 . The highest welding efficiency of 71 % was obtained with the welding process parameters of 400 min À 1 tool rotational speed and 80 mm min À 1 welding speed. Increasing tool rotation speed caused the grain size to be coarser.

show abstract

Section: Methodsmentioning

confidence: 99%

Effects of parameters on friction stir welding process of AA 7075 aluminum alloy: mechanical and microstructural assessments

Ozan

Şahin

Kasman

2022

Materialwissenschaft Werkst

View full text Add to dashboard Cite

show abstract

“…Amidst the several alloys of Mg, AZ91C alloy is one of the well-known cast alloys because of its higher strength, admirable resistance to corrosion and attractive cast-ability. At the same time, the welding of AZ series (including AZ91C) of Mg alloys by employing all types of conventional fusion welding methodologies has only resulted in the attainment of coarse and porous microstructures, large residual category stresses, severe deformities, etc., in the joints [9,10]. The major reason for these defective joints is that, during fusion welding, the enormous temperature of solidification causes the constituents of AZ91C alloy (Mg–Al–Zn) to react with Al, thereby generating eutectic with a lower melting point, leading to the escalation in the tendency towards cracking by heat [11,12].…”

Section: Introductionmentioning

confidence: 99%

Tilt angle impact on strength, microstructure of friction stir welded AZ91CMg plates

Yaknesh

Sevvel²,

Sampathkumar

et al. 2023

Materials Science and Technology

View full text Add to dashboard Cite

The role of tilt angle on strength and microstructural attributes of friction stir welded AZ91C Mg plates was investigated by employing three tilt angles. The presence of unique semicircular-shaped impressions on the surface of the joints attained at 1° tilt angle revealed the generation of ideal heat volume and transfer of plasticised metal towards the trailing end for attaining enhanced fusion. Zone of nugget of the joint obtained during 1° tilt angle, possessed smaller sized grain structures. The strength of joints escalated from 188 to 205 MPa (nearly 86% of the parent metal) when tilt angle was raised from 0° to 1°. But at 2° of tilt angle, strength reduced drastically, declaring the impact of tilt angle is a parabolic category of variation.

show abstract

“…In contrary, the cylindrical tapered or cylindrical threaded tapered pin without any tool offsetting was found to be beneficial during FSW of dissimilar ferrous to nonferrous materials as well as in case of unlike alloys of Mg, respectively. 16,17 Thus, aluminium to copper dissimilar metals joint via modified version of FSW, friction stir double-riveting welding (FSDRW) was proposed with superior mechanical interlocking along Al/Cu interface. 18 This friction stirred procedures have also been used for the strengthening and joining by plastic deformation in polymers and polymeric materials.…”

Section: Introductionmentioning

confidence: 99%

Monitoring of friction stirred spot weld quality for dissimilar Al6061 to polycarbonate using tool assisted thrust-torque signatures

Pattanaik,

Nayak,

Bisoyi

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

Friction stir processing procedures are often found to be an alternative choice for the joining of thermoplastic polymers without melting the base materials. In recent years, dissimilar metallic to thermoplastic assemblies are highly used in aerospace and automotive industries as mechanical fastener or fusion welding techniques are rather inadequate for extreme discrepancy in thermal properties. The present work addresses the feasibility of friction stirred spot welding for non-ferrous aluminium (Al 6061) to polycarbonate using taper cylindrical tool of hardened H13 steel along with machine integrated axial thrust and stirring torque signals. The real-time positional and axial velocity of the rotating tool has been acquired to distinguish between plunging and dwelling stage. The process stability that is, the deviation of thrust-torque in respective phases was processed. The interaction of plunge depth and dwell time on tool pin assisted keyhole with associated material expulsion for different tool revolving speed was established. The weld mechanical behaviour has been scanned using load versus elongation diagram with associated weld pair interface. Lastly, sensors’ based process monitoring extended to weld quality prediction have been made using various significant features of thrust-torque-velocity based approaches. The tool spinning speed followed by dwell time was found to be important on weld quality index. The joint efficiency was significantly upgraded (more than 60%) at intermediate dwell time (40 s) with low tool plunging (0.3 mm) or reversed parametric setting at high tool revolving speed (2500 rpm) due to substantial reduction in axial thrust with higher stirring torque. The local deviation in thrust-torque during plunging was equally responsible with global mean thrust-torque in dwelling to dictate the joint strength and the weld ductility. The material stirring torque was better indicator of weld shear strength while pin assisted slot size highly correlated with tool thrust though tool plunging speed was highly crucial.

show abstract

Effect of Tool Pin Geometry and Process Parameters During FSW of Dissimilar Alloys of Mg

Cited by 11 publications

References 44 publications

Effects of parameters on friction stir welding process of AA 7075 aluminum alloy: mechanical and microstructural assessments

Effects of parameters on friction stir welding process of AA 7075 aluminum alloy: mechanical and microstructural assessments

Tilt angle impact on strength, microstructure of friction stir welded AZ91CMg plates

Monitoring of friction stirred spot weld quality for dissimilar Al6061 to polycarbonate using tool assisted thrust-torque signatures

Contact Info

Product

Resources

About