Refill friction stir spot welding of aerospace alloys in the presence of interfacial sealant

Abstract

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Refill friction stir spot welding of AlSi10Mg alloy produced by laser powder bed fusion to wrought AA7075-T6 alloy

“…Cao et al [14] stated that lower hook height leads to higher ULSF values. Moreover, lower RS (1000-1100 rpm) usually leads to better lap shear strength in highstrength aluminium alloys, as less extensive material plasticisation and mixing take place, leading to lower hook height [15][16][17]. This corresponds with the ULSF results for this work's medium and high…”

Exploring a novel chamfered tool design for short duration refill friction stir spot welds of high strength aluminium

“…Figure 9 compares the results of this study with those of the published RFSSW literature for 2xxx series aluminium alloys, highlighting the positive influence of the chamfered shoulder and that a substantial reduction in welding time is achievable without a significant loss of ULSF. Post-tensile testing fractography revealed two modes of failure that have been reported extensively in the literature [5,9,34,38,51,52]: plug pull-out (PPO) (Fig. 10b-c) and 45° shear through the bottom sheet (TWS) (Fig.…”