Synthesis of nanocrystalline AZ31 magnesium alloy with titanium addition by mechanical milling

In this work, nanocrystalline AZ31 magnesium alloy powders, reinforced by submicron TiB2 particles, were prepared via mechanical milling. It was found that TiB2 particles stimulated the fracture and welding of AZ31/TiB2 powders, leading to the acceleration of the milling process. Meanwhile, the TiB2 particles were refined to submicron-scale size during the milling process, and their distribution was uniform in the Mg matrix. In addition, the matrix was significantly refined during the milling process, which was also accelerated by the TiB2 particles. The formation of grain boundary segregation layers also led to the weakened TiB2 peaks in the XRD patterns during the mechanical milling. The grain sizes of AZ31–2.5 wt % TiB2, AZ31–5 wt % TiB2 and AZ31–10 wt % TiB2 powders were refined to 53 nm, 37 nm and 23 nm, respectively, after milling for 110 h. Under the combined effect of the nanocrystalline matrix and the well-dispersed submicron TiB2 particles, the AZ31/TiB2 composites exhibited excellent micro-hardness. For the AZ31–10 wt % TiB2 composite, the micro-hardness was enhanced to 153 HV0.5.

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EFFECT OF SAMPLE ORIENTATION ON STATIC RECRYSTALLIZATION OF AZ31 MAGNESIUM ALLOY

ACTA METALLURGICA SINICA ◽

10.3724/sp.j.1037.2012.00159 ◽

2012 ◽

Vol 48 (8) ◽

pp. 915 ◽

Cited By ~ 1

Author(s):

Hongtao HUANG ◽

Andrew Godfrey ◽

Wei LIU ◽

Ruihe TANG ◽

Qing LIU

Keyword(s):

Magnesium Alloy ◽

Static Recrystallization ◽

Az31 Magnesium Alloy ◽

Sample Orientation

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Influence of Coconut Shell ash particle (CSAp) as reinforcement on mechanical and wear behavior of AZ31 magnesium alloy

Materials Today Proceedings ◽

10.1016/j.matpr.2020.11.832 ◽

2020 ◽

Author(s):

S. Kanthasamy ◽

T.S. Ravikumar ◽

T. Tamilanban

Keyword(s):

Magnesium Alloy ◽

Wear Behavior ◽

Coconut Shell ◽

Az31 Magnesium Alloy ◽

Coconut Shell Ash

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Revealing joining mechanism in refill friction stir spot welding of AZ31 magnesium alloy to galvanized DP600 steel

Materials & Design ◽

10.1016/j.matdes.2021.109997 ◽

2021 ◽

pp. 109997

Author(s):

Banglong Fu ◽

Junjun Shen ◽

Uceu F.H.R. Suhuddin ◽

Ayrton A.C. Pereira ◽

Emad Maawad ◽

...

Keyword(s):

Magnesium Alloy ◽

Spot Welding ◽

Friction Stir Spot Welding ◽

Az31 Magnesium Alloy ◽

Friction Stir

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The influence of gadolinium on Al–Ti–C master alloy and its refining effect on AZ31 magnesium alloy

International Journal of Materials Research (formerly Zeitschrift fuer Metallkunde) ◽

10.1515/ijmr-2020-7779 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Wenxue Fan ◽

Hai Hao

Keyword(s):

Mechanical Properties ◽

Magnesium Alloy ◽

Grain Refinement ◽

Magnesium Alloys ◽

Master Alloy ◽

Cast Alloy ◽

Az31 Magnesium Alloy ◽

Synthesis Mechanism ◽

Refining Effect ◽

Master Alloys

Abstract Grain refinement has a significant influence on the improvement of mechanical properties of magnesium alloys. In this study, a series of Al–Ti–C-xGd (x = 0, 1, 2, 3) master alloys as grain refiners were prepared by self-propagating high-temperature synthesis. The synthesis mechanism of the Al–Ti–C-xGd master alloy was analyzed. The effects of Al–Ti–C-xGd master alloys on the grain refinement and mechanical properties of AZ31 (Mg-3Al-1Zn-0.4Mn) magnesium alloys were investigated. The results show that the microstructure of the Al–Ti–C-xGd alloy contains α-Al, TiAl3, TiC and the core–shell structure TiAl3/Ti2Al20Gd. The refining effect of the prepared Al–Ti–C–Gd master alloy is obviously better than that of Al–Ti–C master alloy. The grain size of AZ31 magnesium alloy was reduced from 323 μm to 72 μm when adding 1 wt.% Al–Ti–C-2Gd master alloy. In the same condition, the ultimate tensile strength and elongation of as-cast alloy were increased from 130 MPa, 7.9% to 207 MPa, 16.6% respectively.

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