302 Plastic formability of an AZ31 magnesium alloy subjected to a grain refinement

2005 ◽  
Vol 2005 (0) ◽  
pp. 45-46
Author(s):  
Yusuke OTA ◽  
Takuya HANADA ◽  
Goroh ITOH ◽  
Yoshinobu MOTOHASHI
Author(s):  
Wenxue Fan ◽  
Hai Hao

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.


2008 ◽  
Vol 461 (1-2) ◽  
pp. 298-303 ◽  
Author(s):  
Mingbo Yang ◽  
Fusheng Pan ◽  
Renju Cheng ◽  
Aitao Tang

2016 ◽  
Vol 26 (5) ◽  
pp. 1284-1293 ◽  
Author(s):  
Zhong-tao JIANG ◽  
Bin JIANG ◽  
Jian-yue ZHANG ◽  
Jia-hong DAI ◽  
Qing-shan YANG ◽  
...  

2012 ◽  
Vol 57 (3) ◽  
pp. 711-717 ◽  
Author(s):  
K. Bryła ◽  
J. Dutkiewicz ◽  
L. Litynska-Dobrzynska ◽  
L.L. Rokhlin ◽  
P. Kurtyka

The aim of this work was to investigate the influence of the number of equal channel angular pressing (ECAP) passes on the microstructure and mechanical properties of AZ31 magnesium alloy. The microstructure after two and four passes of ECAP at 423 and 523 K was investigated by means of optical and transmission electron microscopy. The mechanical properties were carried out using Vickers microhardness measurements and compression test. The grain refinement in AZ31 alloy was obtained using ECAP routes down to 1,5 μm at 423 K. Processes of dynamic recrystallization during ECAP were observed. It was found that a gradual decrease of grain size occurs with the increasing of number of ECAP passes. The grain refinement increases mechanical properties at ambient temperature, such as Vickers microhardness and compression strength proportionally to d-0.5.


2007 ◽  
Vol 38 (6) ◽  
pp. 1358-1366 ◽  
Author(s):  
Yingxin Wang ◽  
Xiaoqin Zeng ◽  
Wenjiang Ding ◽  
Alan A. Luo ◽  
Anil K. Sachdev

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