Structure and Mechanical Properties of Friction Stir Weld Joints of Magnesium Allov AZ31

Nagasawa, Toshio; Otsuka, Masahisa; Yokota, Takeo; Ueki, Tadahiro

doi:10.1002/9781118859803.ch84

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…Magnesium (Mg) alloys are considered to be one of the light weight metallic alloys due to its higher mechanical stiffness and lower density which is around 1.74 g/cm 3 [4]. In the presence of seawater, the benefits of magnesium are distinctive by high corrosion rate compared to aluminium or Steel [5].…”

Section: Introductionmentioning

confidence: 99%

Studies of corrosion on AA 6061 and AZ 61 friction stir welded plates

Raguraman¹,

Muruganandam²,

Dhas³

2016

Adv produc engineer manag

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A remarkably new welding process, namely friction stir welding (FSW) has reached a tremendous research interest on the present decade due to bonding of similar or dissimilar materials at solidus state. This welding technique is environment friendly and versatile. In specific, FSW can be used to join the high strength aluminium alloys and other dissimilar alloys that are difficult to weld by conventional fusion welding. The process parameters have a major role in changing the characterisation of the joint. In this work, three parameters of the weld, namely rotational speed (rpm), axial load (kN), and weld speed (mm/min) are considered. Three pairs of AA 6061 and AZ 61 plates were welded with three different sets of these parameters. The welded zone was immersed in corrosive solution of NaOH for six months period. Corrosion behaviour was studied with the help of SEM and EDAX. Through this investigation, the importance of weld parameters control for the study of effects on the susceptibility for corrosion on the welded region can be sought.

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Section: Introductionmentioning

confidence: 99%

Studies of corrosion on AA 6061 and AZ 61 friction stir welded plates

Raguraman¹,

Muruganandam²,

Dhas³

2016

Adv produc engineer manag

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“…During the FSW process, a non-consumable rotating tool with a pin and shoulder that provide 'stir' action is inserted into the abutting edges of the plates to be joined and will traverse along the joint line. The rotating tool moves along the weld line and develops frictional heating of the material, causing it to plasticize where it cools and consolidate to produce a high integrity weld [7][8][9]. Even so, there are still several defects that need to be addressed in FSW, such as worn holes, tunnels and 'surface lack of fill' defects at the weld joint of the aluminium alloy.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Single-Pass/Double-Pass Techniques on Friction Stir Welding of Aluminium

Sathari¹,

Shah²,

Razali³

2014

J MECH ENG SCI

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The aim of this research is to study the effects of single-pass/ double-pass techniques on friction stir welding of aluminium. Two pieces of AA1100 with a thickness of 6.0 mm were friction stir welded using a CNC milling machine at rotational speeds of 1400 rpm, 1600 rpm and 1800 rpm respectively for single-pass and double-pass. Microstructure observations of the welded area were studied using an optical microscope. The specimens were tested by using a tensile test and Vickers hardness test to evaluate their mechanical properties. The results indicated that, at low rotational speed, defects such as 'surface lack of fill' and tunnels in the welded area contributed to a decrease in mechanical properties. Welded specimens using double-pass techniques show increasing values of tensile strength and hardness. From this investigation it is found that the best parameters of FSW welded aluminium AA1100 plate were those using double-pass techniques that produce mechanically sound joints with a hardness of 56.38 HV and 108 MPa strength at 1800 rpm compared to the single-pass technique.

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