Stationary shoulder tool in friction stir processing: a novel low heat input tooling system for magnesium alloy

The corrosion behavior of as-cast AZ91C magnesium alloy was studied by performing friction stir processing (FSP) and FSP followed by solution annealing and then aging. Phase analysis, microstructural characterization, potentiodynamic polarization test and immersion tests were carried out to relate the corrosion behavior to the samples microstructure. The microstructural observations revealed the breakage and dissolution of coarse dendritic microstructure as well as the coarse secondary [Formula: see text]-Mg[Formula: see text]Al[Formula: see text] phase which resulted in a homogenized and fine grained microstructure (15[Formula: see text][Formula: see text]m). T6 heat treatment resulted in an excessive growth and dispersion of the secondary phases in the microstructure of FSP zone. The potentiodynamic polarization and immersion tests proved a significant effect of both FSP and FSP followed by T6 on increasing the corrosion resistance of the cast AZ91C magnesium alloy. Improve in corrosion resistance after FSP was attributed to grain refinement and elimination of segregations and casting defects which makes more adhesive passive layer. Increase in volume fraction of precipitations after T6 heat treatment is determined to be the main factor which stabilizes the passive layer at different polarization values and is considered to be responsible for increasing the corrosion resistance.

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Tensile properties of AZ61 magnesium alloy produced by multi-pass friction stir processing: Effect of sample orientation

Materials Science and Engineering A ◽

10.1016/j.msea.2018.04.017 ◽

2018 ◽

Vol 725 ◽

pp. 398-405 ◽

Cited By ~ 30

Author(s):

X.C. Luo ◽

D.T. Zhang ◽

W.W. Zhang ◽

C. Qiu ◽

D.L. Chen

Keyword(s):

Magnesium Alloy ◽

Tensile Properties ◽

Friction Stir Processing ◽

Friction Stir ◽

Processing Effect ◽

Az61 Magnesium Alloy ◽

Sample Orientation

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On the role of sliding load and heat input conditions in friction stir processing on tribology of aluminium alloy–alumina surface composites

Tribology - Materials Surfaces & Interfaces ◽

10.1080/17515831.2019.1591085 ◽

2019 ◽

Vol 13 (2) ◽

pp. 88-101 ◽

Cited By ~ 2

Author(s):

Rajeet Kumar Singh Yadav ◽

Vipin Sharma ◽

B. Venkata Manoj Kumar

Keyword(s):

Aluminium Alloy ◽

Friction Stir Processing ◽

Heat Input ◽

Alumina Surface ◽

Friction Stir ◽

Surface Composites

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Effect of Thermal History on Microstructures and Mechanical Properties of AZ31 Magnesium Alloy Prepared by Friction Stir Processing

Materials ◽

10.3390/ma7031573 ◽

2014 ◽

Vol 7 (3) ◽

pp. 1573-1589 ◽

Cited By ~ 28

Author(s):

Fang Chai ◽

Datong Zhang ◽

Yuanyuan Li

Keyword(s):

Mechanical Properties ◽

Magnesium Alloy ◽

Friction Stir Processing ◽

Thermal History ◽

Az31 Magnesium Alloy ◽

Friction Stir ◽

Microstructures And Mechanical Properties

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Microstructure and Corrosion Resistance of AZ80/Al Composite Plate Fabricated by Friction Stir Processing

Materials Science Forum ◽

10.4028/www.scientific.net/msf.747-748.313 ◽

2013 ◽

Vol 747-748 ◽

pp. 313-319 ◽

Cited By ~ 2

Author(s):

Fen Cheng Liu ◽

Qiang Liu ◽

Chun Ping Huang ◽

Kun Yang ◽

Cheng Gang Yang ◽

...

Keyword(s):

Corrosion Resistance ◽

Magnesium Alloy ◽

Friction Stir Processing ◽

Composite Plate ◽

Composite Layer ◽

Electrochemical Corrosion ◽

Friction Stir ◽

Alloy Substrate ◽

Corrosion Medium ◽

Al Composite

AZ80/Al composite plate was fabricated by means of friction stir processing (FSP) aimed at the improvement of corrosion resistance of magnesium alloy. The cross-section microstructure, surface morphology and corrosion resistance of the Al composite layer were investigated. The experiment results indicated that a dense composite Al layer with superfine and uniform grains was formed, and a few amount of intermetallic compounds existed in the area of Mg/Al interface. The bonding strength of AZ80 magnesium alloy substrate and 1060 pure Al layer was proved to be high which was resulted from the metallurgical bonding of FSP. Microhardness measurement showed the continuous changing of microhardness values from the outmost surface of composite Al layer to the magnesium alloy substrate. Results of electrochemical corrosion test of the composite plate in 5 wt.% NaCl solution showed the better protection effect of the composite Al layer on the magnesium alloy in a corrosion medium. Almost the same corrosion level on the whole corrosion surface was observed which indicated the highly uniform microstructure of the composite layer. It was also proved that the plain arches on the outmost surface of the composite Al layer had no influence on the corrosion resistance of composite Al layer.

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