Effect of tool tilt angle on strength and microstructural characteristics of friction stir welded lap joints of AA2014-T6 aluminum alloy

Rajendran, C. P.; Srinivasan, K.; Balasubramanian, V.; Balaji, H.; Selvaraj, P.

doi:10.1016/s1003-6326(19)65090-9

Cited by 80 publications

(35 citation statements)

References 30 publications

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“…33 The unequal thickness dissimilar material joints in lap configuration are also commonly employed in civil aircraft structures such as wings and fuselage. 61 These joints are conventionally made through mechanical joining route for metal-metal and metal-polymer lap joint configuration. 62 Selfpiercing rivets are mostly employed to join unequal thickness dissimilar materials in lap joint configurations.…”

Section: Challenges In Joining Of Unequal Thickness Dissimilar Materials In Different Joint Configurations In Aircraft Applicationsmentioning

confidence: 99%

Challenges in joining of unequal thickness materials for aerospace applications: A review

Majeed

Mehta

Siddiquee

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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The increasing industrial demand to reduce structural weight, optimize structural strength, and high performance has led to the increasing use of tailors welded blanks. However, the joining of tailors welded blanks is an issue of concern to researchers owing to the difference in thickness between the materials in addition to the difference in physical and chemical properties in the case of dissimilar materials. These challenges in joining of tailors welded blanks are conquered by a recent solid phase joining process known as friction stir welding. This review work covers different methods of joining unequal thickness similar/dissimilar (or tailors welded blanks) aircraft materials in different joint configurations along with the challenges and failure modes encountered in these joining processes. From this article researchers and industrialists can take advantage and conquer relative limitations in order to meet the future challenges for joining of similar/dissimilar aircraft materials with unequal thickness

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Section: Challenges In Joining Of Unequal Thickness Dissimilar Materials In Different Joint Configurations In Aircraft Applicationsmentioning

confidence: 99%

Challenges in joining of unequal thickness materials for aerospace applications: A review

Majeed

Mehta

Siddiquee

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…On the RS, the material was not only squeezed and rubbed by the rotate tool but also squeezed by the metal in front of the rotating surface. erefore, the distortion energy was increased and the work hardening effect is produced [24].…”

Section: Mechanical Propertymentioning

confidence: 99%

Effect of Traverse Speed on the Defect Characteristic, Microstructure, and Mechanical Property of Friction Stir Welded T‐Joints of Dissimilar Mg/Al Alloy

Sun

Shen

et al. 2020

Advances in Materials Science and Engineering

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The AZ31 B/2024-T4 T-lap-joint was successfully fabricated by friction stir welding (FSW) with different welding parameters. The defect characteristics and metallurgical structure were observed and analyzed using optical microscope (OM) and scanning electron microscopy (SEM). Besides, the effects of defects and welding parameters on mechanical properties were investigated. The results show that an effective metallurgical reaction zone can be formed between Mg and Al (Mg-Al MRZ) and the island structures and lamellar structures appeared in the Mg-Al MRZ. The T-joints without tunnel defects can be obtained and the excellent mechanical properties of the T-joint were achieved using the welding speed of 50 mm/min. The tensile strength along the skin and the stringer was mainly affected by the kiss bonding defects.

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“…Hence, effective sheet thickness was reduced which resulted in poor weld strength, because the gap between the tool and the work piece made from the tilt of the tool expands with increasing the tilt angle. Thus, by increasing the tilt angle, the plasticized material escapes easily from the underside of the tool shoulder [38,39]. Consequently, a discontinuity occurs in the weld, which leads to the formation of some voids at the surface.…”

Section: Relationship Between Tool Tilt Angle and Joint Qualitymentioning

confidence: 99%

Mechanical properties and microstructural characteristics of friction stir welded AA2014-T6 aluminium alloy joints

Chinnasamy¹,

Srinivasan

Balasubramanian

et al. 2019

Journal of the Mechanical Behavior of Materials

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The quality of friction stir welded joints depends upon the working parameters such as rotational speed, welding speed, shoulder diameter, tilt angle; etc. Each process parameter has a significant effect on the formation of joint strength. This investigation attempts to understand the effect of friction stir welding parameters on microstructural characteristics and tensile strength of AA2014-T6 aluminium alloy. This is performed by changing any one of the process parameters from minimum to maximum and keeping others constant. The joint fabricated from a rotational speed of 1500 rpm, welding speed of 40 mm/min, shoulder diameter of 6 mm and tilt angle of 1.5∘ yielded superior tensile properties compared to their counter joints. Due to the formation of defect-free weld, balanced material flow and uniform distribution of strengthening precipitates in the stir zone is achieved.

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Effect of tool tilt angle on strength and microstructural characteristics of friction stir welded lap joints of AA2014-T6 aluminum alloy

Cited by 80 publications

References 30 publications

Challenges in joining of unequal thickness materials for aerospace applications: A review

Challenges in joining of unequal thickness materials for aerospace applications: A review

Effect of Traverse Speed on the Defect Characteristic, Microstructure, and Mechanical Property of Friction Stir Welded T‐Joints of Dissimilar Mg/Al Alloy

Mechanical properties and microstructural characteristics of friction stir welded AA2014-T6 aluminium alloy joints

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