A high-strength Mg-15.3Gd-1.8Ag-0.3Zr (GQ152K, mass fraction) alloy was prepared by conventional
ingot metallurgy process. The solution and aging (denoted as T6) treated alloy exhibits remarkable mechanical
properties with ultimate tensile strength of 421MPa and tensile yield strength of 309MPa. It has higher igniting
temperature of 1 208 K. Moreover, it can stand against flame at 1 203K for over 6min in vertical burning tests,
and its flammability behavior is very similar to that of 6101Al alloy. Vertical burning tests appear to be able
to directly study the flammability behavior of Mg alloys and it appears to be a good approach to study the
flammability behavior of Mg alloys in an aircraft fire accident.
WU Yu-juan1,2 (吴玉娟), PENG Li-ming1,2* (彭立明), ZHAO Su3 (赵素),LI De-jiang1,2* (李德江), HUANG Fei1,2 (黄飞), DING Wen-jiang1,2 (丁文江)
. Ignition-Proof Properties of a High-Strength Mg-Gd-Ag-Zr Alloy[J]. Journal of Shanghai Jiaotong University(Science), 2012
, 17(6)
: 643
-648
.
DOI: 10.1007/s12204-012-1338-1
[1] Li Yong-yan, Ding Jian, Xue Hai-tao, et al. Current research on ignition-proof magnesium alloys [J]. Material Sciences, 2011(1): 56-59 (in Chinese).
[2] Wang Z H, Wang X D, Li S B, et al. Effects of Gd and Er on the ignition-proof properties of magnesium alloy [J]. Advanced Materials Research, 2011, 239-242:122-126.
[3] Liu M, Shih D S, Parish C, et al. The ignition temperature of Mg alloys WE43, AZ31 and AZ91 [J]. Corrosion Science, 2012, 54: 139-142.
[4] Fan J F, Yang C L, Han G, et al. Oxidation behavior of ignition-proof magnesium alloys with rare earth addition [J]. Journal of Alloys and Compounds, 2011,509: 2137-2142.
[5] Huang X F, Zhou H, He Z M. Structure analysis of oxidation film of ignition-inhibition AZ91D magnesium alloy added with cerium [J]. Journal of Rare Earths,2003, 21(1): 73-76
[6] Ravi-Kumar N V, Blandin J J, Su′ery M, et al. Effect of alloying elements on the ignition resistance of magnesium alloys [J]. Scripta Materialia, 2003, 49(3):225-230.
[7] Wang Shi-jun, Wang Quan, Wang Xian. The relation between the content of Al in Mg-Al alloy and the burning point of Mg-Al alloy [J]. Light Metal, 2007(7):46-47 (in Chinese).
[8] Zhao W M, Sun Y, Li H, et al. The effects of some elements on the igniting temperature of magnesium alloys [J]. Materials Science and Engineering B, 2006,127: 105-107.
[9] Nie J F, Muddle B C. Characterization of strengthening precipitate phases in a Mg-Y-Nd alloy [J]. Acta Materialia, 2000, 48(8): 1691-1703.
[10] Nie J F, Gao X, Zhu S M. Enhanced age hardening response and creep resistance of Mg-Gd alloys containing Zn [J]. Scripta Materialia, 2005, 53(9): 1049-1053.
[11] He S M, Zeng X Q, Peng L M, et al. Precipitation in a Mg-10Gd-3Y-0.4Zr (wt.%) alloy during isothermal ageing at 250℃ [J]. Journal of Alloys and Compounds,2006, 421(1-2): 309-313.
[12] Cizek J, Prochazka I, Smola B, et al. Influence of deformation on precipitation process in Mg-15wt.%Gd alloy [J]. Journal of Alloys and Compounds, 2007,430(1-2): 92-96.
[13] Zhu Y M, Morton A J, Nie J F. Improvement in the age-hardening response of Mg-Y-Zn alloys by Ag additions [J]. Scripta Materialia, 2008, 58: 525-528
[14] Gao X, Nie J F. Enhanced precipitation-hardening in Mg-Gd alloys containing Ag and Zn [J]. Scripta Materialia,2008, 58: 619-622
[15] Yamada K, Hoshikawa H, Maki S, et al. Enhanced age-hardening and formation of plate precipitates in Mg-Gd-Ag alloys [J]. Scripta Materialia, 2009, 61:636-639
[16] Wu Y J, Zeng X Q, Lin D L, et al. The microstructure evolution with lamellar 14H-type LPSO structure in an Mg96.5Gd2.5Zn1 alloy during solid solution heat treatment at 773K [J]. Journal of Alloys and Compounds,2009, 477: 193-197.
[17] Wu Y J, Peng L M, Lin D L, et al. A high-strength extruded Mg-Gd-Zn-Zr alloy with superplasticity [J].Journal of Material Research, 2009, 24(12): 3596-3602.
[18] Ding W J, Wu Y J, Peng L M, et al. Formation of 14H-type long period stacking ordered structure in the as-cast and solid-solution-treated Mg-Gd-Zn-Zr alloys [J]. Journal of Material Research, 2009, 24(5): 1842-1854.
[19] Wu Y J, Lin D L, Zeng X Q, et al. Formation of a lamellar 14H-type long period stacking ordered structure in an as-cast Mg-Gd-Zn-Zr alloy [J]. Journal of Material Science, 2009, 44: 1607-1612.
[20] Honma T, Ohkubo T, Kamado S, et al. Effect of Zn additions on the age-hardening of Mg-2.0Gd-1.2Y-0.2Zr alloys [J]. Acta Materialia, 2007, 55(12): 4137-4150.
