Microstructural modification and ductility enhancement of surfaces modified by FSP in aluminium alloys

Nascimento, Filipe; Santos, Telmo G.; Vilaça, Pedro; Miranda, Rosa Maria Mendes; Quintino, L.

doi:10.1016/j.msea.2009.01.008

Cited by 87 publications

(37 citation statements)

References 13 publications

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“…They reported that the ultimate tensile strengths, ductilities and fatigue lives of both alloys were increased by the friction stir processing. Nascimento et al [13] have achieved a significant increase in the formability of friction stir processed AA5083 and AA7022 alloys. Friction stir processing of hypereutectic Al-30Si alloy was studied by Rao et al [14].…”

Section: Introductionmentioning

confidence: 99%

Influence of Multi-pass Friction Stir Processing on Microstructure and Mechanical Properties of Die Cast Al–7Si–3Cu Aluminum Alloy

Baruch¹,

Ramesh

Balasubramanian

et al. 2016

Acta Metall. Sin. (Engl. Lett.)

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The influence of overlap multi-pass friction stir processing on the microstructure and the mechanical properties, in particular, strength, ductility and hardness of die cast Al-7Si-3Cu aluminum alloy was investigated. It was observed that increase in the number of overlap passes friction stir processing resulted in significant refinement and redistribution of aluminum silicon eutectic phase and elimination of casting porosities. The microstructural refinement by the friction stir processing not only increases the ultimate tensile strength from 121 to 273 MPa, but also increases the ductility as observed by the increase in fracture strain from 1.8% to 10%. Analysis of the fractured surface reveals that the microstructural refinement obtained by friction stir processing plays a vital role in transforming the fracture mode from completely mixed mode to the ductile mode of the fracture with increasing number of passes. The change in the size, shape, morphology and distribution of eutectic silicon particles and elimination of the porosities are the main reasons for the increases in tensile strength and ductility due to friction stir processing.

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Section: Introductionmentioning

confidence: 99%

Influence of Multi-pass Friction Stir Processing on Microstructure and Mechanical Properties of Die Cast Al–7Si–3Cu Aluminum Alloy

Baruch¹,

Ramesh

Balasubramanian

et al. 2016

Acta Metall. Sin. (Engl. Lett.)

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show abstract

“…The reason is that the impedance changes are mainly due to the presence of the FSW weld bead, instead the presence of a defect. In fact the FSW process causes microstructural modifications (Nascimento et al, 2009) material conductivity changes in the bead zone, even without any imperfections. Therefore there is no distinctive signal feature that can allow to distinct between each defect condition.…”

Section: Conventional Eddy Current (Ec)mentioning

confidence: 99%

Non-Destructive Testing Techniques for Detecting Imperfections in Friction Stir Welds of Aluminium Alloys

Vilaça¹,

Santos²

2011

Aluminium Alloys, Theory and Applications

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“…Among these various parameters, the pin profile tool has an important role in the improvement in the material toughness or flexibility in the specific field of microstructure in magnesium alloys. Recently, a few researchers have indicated the possibility of using different tool pin designs which can make a significant improvement in hardness, grain refinement and microstructure changes of the FSP/FSW on magnesium alloy [15][16][17] and aluminum alloy 18 . The pin, or probe, and the shoulder are the main mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Effect of Scroll Pin Profile and Tool Rotational Speed on Mechanical Properties of Submerged Friction Stir Processed AZ31B Magnesium Alloy

Ramaiyan

Santhanam

Muthuguru³

2018

Mat. Res.

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In this study, an effort has been made to choose an appropriate tool pin profile and rotational speed for a tool using a submerged friction stir processed hot rolled AZ31B magnesium alloy. A defect free process region was obtained using a novel tool shoulder, which consisted of a scroll. Three tool pin profiles, namely, simple cylindrical, stepped cylindrical and stepped square pin have been used. Tensile properties and fracture behavior revealed defect free friction stir processed specimens. The microstructural studies reveal the possibility of producing a defect free processed region using the stepped square pin tool geometry. The presence of fine recrystallized grains (1.99 µm) and the absence of defects in the processed region lead to higher hardness and superior tensile properties.

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Microstructural modification and ductility enhancement of surfaces modified by FSP in aluminium alloys

Cited by 87 publications

References 13 publications

Influence of Multi-pass Friction Stir Processing on Microstructure and Mechanical Properties of Die Cast Al–7Si–3Cu Aluminum Alloy

Influence of Multi-pass Friction Stir Processing on Microstructure and Mechanical Properties of Die Cast Al–7Si–3Cu Aluminum Alloy

Non-Destructive Testing Techniques for Detecting Imperfections in Friction Stir Welds of Aluminium Alloys

Effect of Scroll Pin Profile and Tool Rotational Speed on Mechanical Properties of Submerged Friction Stir Processed AZ31B Magnesium Alloy

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