Comparation about Refining Efficiency to Microstructure of AZ31 Magnesium Alloy for Sr Master Alloys

2015 ◽  
Vol 816 ◽  
pp. 498-503
Author(s):  
Ren Ju Cheng ◽  
Bo Liu ◽  
Bin Jiang ◽  
Su Qin Luo ◽  
Qing Shan Yang ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Grain Refinement ◽  
Magnesium Alloys ◽  
Az31 Magnesium Alloy ◽  
Refining Efficiency ◽  
Refinement Efficiency ◽  
Master Alloys ◽  
Refinement Effect ◽  
Cast Microstructure ◽  
Better Than

In the present work, the influence of Al-Sr and Mg-Sr master alloys on the as-cast microstructure of the AZ31 magnesium alloy was investigated,and the refinement efficiencies of both master alloys were also analyzed and compared. The research results indicate that both the Al-Sr and Mg-Sr master alloys have obvious refinement effect on the as-cast microstructure of the AZ31 magnesium alloy, and the refinement efficiency of the Mg-Sr master alloys was better than that of the Al-Sr master alloys. The mechanisms for the differences of grain refinement efficiency between Al-Sr and Mg-Sr master alloys on the AZ31 magnesium alloys were also discussed.

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

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.

Effects of solutionized Al–10Sr master alloys on grain refinement of AZ31 magnesium alloy

2008 ◽  
Vol 461 (1-2) ◽  
pp. 298-303 ◽  
Author(s):  
Mingbo Yang ◽  
Fusheng Pan ◽  
Renju Cheng ◽  
Aitao Tang
Keyword(s):  
Magnesium Alloy ◽  
Grain Refinement ◽  
Az31 Magnesium Alloy ◽  
Master Alloys

Effects of Al-10Sr master alloys on grain refinement of AZ31 magnesium alloy

2008 ◽  
Vol 18 (1) ◽  
pp. 52-58 ◽  
Author(s):  
Ming-bo YANG ◽  
Fu-sheng PAN ◽  
Ren-ju CHENG ◽  
Ai-tao TANG
Keyword(s):  
Magnesium Alloy ◽  
Grain Refinement ◽  
Az31 Magnesium Alloy ◽  
Master Alloys

Microstructure of Al-4.99Zr-1.1B Master Alloy and Its Grain Refinement Effect on AZ31 Magnesium Alloy

2014 ◽  
Vol 43 (11) ◽  
pp. 2567-2571 ◽  
Author(s):  
Wang Shuncheng ◽  
Gan Chunlei ◽  
Li Xiaohui ◽  
Zheng Kaihong ◽  
Qi Wenjun
Keyword(s):  
Magnesium Alloy ◽  
Grain Refinement ◽  
Master Alloy ◽  
Az31 Magnesium Alloy ◽  
Refinement Effect

Preparation of Al-Ti-B-C Master Alloy and its Grain Refinement Effect for Pure Al

2012 ◽  
Vol 452-453 ◽  
pp. 778-781 ◽  
Author(s):  
Z.Q. Wang ◽  
H. Wu ◽  
Z.X. Yang ◽  
H.R. Geng
Keyword(s):  
Grain Refinement ◽  
Master Alloy ◽  
Molar Ratio ◽  
Refinement Efficiency ◽  
Master Alloys ◽  
The Matrix ◽  
Refinement Effect

In this paper, we successfully produced Al-Ti-B-C master alloys through adding mixtures of Ti and B4C powders into Al melt. XRD and SEM examinations suggest that only fine TiB2 and TiC particles are formed in the matrix of Al-Ti-B-C master alloy when the Ti/B4C molar ratio is 3/1, while an additional TiAl3 phase is present when the Ti/B4C molar ratio exceeds 3/1. The produced Al-Ti-B-C master alloys exhibited high grain refinement effect for pure Al. It was found that the presence of TiAl3 phase in the matrix of Al-Ti-B-C master alloy enhanced the grain refinement efficiency and the mechanism was discussed.

Effect of Al-Ti-B Based Master Alloys on Grain Refinement and Hot Tearing Susceptibility of AZ91E Magnesium Alloy

2011 ◽  
Vol 690 ◽  
pp. 351-354 ◽  
Author(s):  
Elsayed Abdallah ◽  
Comondore Ravindran ◽  
B.S Murty
Keyword(s):  
Magnesium Alloy ◽  
Grain Refinement ◽  
Magnesium Alloys ◽  
Base Alloy ◽  
Hot Tearing ◽  
Automotive Applications ◽  
Dog Bone ◽  
Master Alloys ◽  
As Stress ◽  
Hot Tearing Susceptibility

The objective of this study was to examine the potential of Al-5Ti-1B and Al-1Ti-3B master alloys in reducing the hot tearing susceptibility of AZ91E magnesium alloy. The low penetration of magnesium alloys for structural automotive applications can be attributed to their poor castability during permanent mould casting. An improvement in the castability of magnesium alloys will result in the production of larger castings for automotive applications and a reduction in vehicle weight. The addition levels examined for both master alloys were 0.1, 0.2, 0.5 and 1.0 wt.%. The master alloys were added to the AZ91E alloy and stirred for 30 seconds. For the graphite mould castings used to observe grain refinement, the pouring and mould temperatures were 720 and 750 °C respectively. The hot tear castings were produced using a “dog bone” shaped H-13 tool steel mould. The pouring and mould temperatures were 720 and 180 °C respectively. Without master alloy addition, the base AZ91E casting had severe hot tears. The addition of Al-5Ti-1B slightly reduced hot tears while Al-1Ti-3B addition significantly reduced hot tears. The addition of Al-1Ti-3B also significantly reduced the grain size of the castings from 113 µm in the base alloy to 72 µm with 1.0 wt.% addition. The addition of Al-5Ti-1B did not lead to a reduction of hot tears because of large TiAl3 particles acting as stress risers during solidification.

Sign in / Sign up

Export Citation Format

Share Document