Please wait a minute...
Acta Metall Sin  2010, Vol. 46 Issue (5): 575-580    DOI: 10.3724/SP.J.1037.2009.00708
论文 Current Issue | Archive | Adv Search |
PRECIPITATION BEHAVIOR OF GP ZONES DURING AGEING PROCESS OF Mg-Zn ALLOY
WANG Xiaoliang1);  LI Changrong1);  GUO Cuiping1);  DU Zhenmin1);  HE Wei2)
1) School of Materials Science and Engineering; University of Science and Technology Beijing; Beijing 100083 2) School of Materials Science and Engineering; University of Guangxi; Nanning 530004
Cite this article: 

WANG Xiaoliang LI Changrong GUO Cuiping DU Zhenmin HE Wei. PRECIPITATION BEHAVIOR OF GP ZONES DURING AGEING PROCESS OF Mg-Zn ALLOY. Acta Metall Sin, 2010, 46(5): 575-580.

Download:  PDF(822KB) 
Export:  BibTeX | EndNote (RIS)      
Abstract  

The age--hardening behavior of the Mg-1.9Zn (atomic fraction, %) alloy, morphologies of GP zones and temperature range of GP zone precipitation in the alloy were investigated by micro-hardness, XRD and TEM. The results show that the Zn atoms segregation occurs in the super-saturated solid solution, forming GP zones with different shapes during ageing process at 343 and 383 K; while at 423 K the age-hardening peak occurs earlier but no typical GP zone appeared. Using the thermodynamic parameters of the Mg-Zn system, the Gibbs free energy relations of the Mg-based solid solution phase were calculated, indicating the existences of the metastable miscibility gap and the solute atoms segregation in the super-saturated solid solution. With the reported data and the present experimental results, the ranges of composition and aging temperature for GP zone precipitation in the Mg-Zn alloy were determined.

Key words:  Mg-Zn alloy      low temperature ageing      GP zone      thermodynamic analysis     
Received:  26 October 2009     
Fund: 

Supported by National Natural Science Foundation of China (Nos.50731002 and 50671009) and Specialized Research Fund for the Doctoral Program of Higher Education (No.20060008015)

URL: 

https://www.ams.org.cn/EN/10.3724/SP.J.1037.2009.00708     OR     https://www.ams.org.cn/EN/Y2010/V46/I5/575

[1] Yan F Y, Zhang Y H. Modern Manuf Technol Equipt, 2007; (4): 13
(阎峰云, 张玉海. 现代制造技术与装备, 2007; (4): 13)
[2] Zuo T Y. Adv Mater Ind, 2007; (12): 22
(左铁镛. 新材料产业, 2007; (12): 22)
[3] Shen K, Yin Z M, Wang T. Trans Nanjing Univ Aeronaut Astronaut, 2007; 24: 3
[4] Meissner K L. J Inst Met, 1927; 38 : 195
[5] Sturkey L, Clark J B. J Inst Met, 1959; 88: 177
[6] Murakami Y, Kawano O, Tamura H. Trans Jpn Inst Met,1971; 12: 323
[7] Mima G, Tanaka Y. J Jpn Inst Met, 1969; 33: 796
[8] Murakami Y, Kawano K, Tamura H. Mem Fac Eng, 1962; 23: 93
[9] Clark J B. Acta Metall, 1965; 13: 1281
[10] Buha J. Mater Sci Eng, 2008; A492: 11
[11] Agarwal R, Fries S G, Lukas H L. Z Metallkd, 1992; 83: 216
[12] Sundman B. Jansson B, Andersson J O. CALPHAD, 1985; 9: 153
[13] Kaptay G. Calphad, 2004; 28: 115
[14] Chen S L, Zhang F, Daniel S, Xie X F, Yan X Y, Chang Y A, Schmid–Fetzer R, Oates W A. JOM, 2003; 55(12): 48
[15] Clark J B, Zabdyr L, Moser Z. Phase Diagrams of Binary Magnesium Alloys, Metals Park, OH: ASM, 1988: 353

[1] Yong LI,Mingxing GUO,Ning JIANG,Xukai ZHANG,Yan ZHANG,Linzhong ZHUANG,Jishan ZHANG. PRECIPITATION BEHAVIORS AND PREPARATION OF AN ADVANCED Al-0.93Mg-0.78Si-0.20Cu-3.00Zn ALLOY FOR AUTOMOTIVE APPLICATION[J]. 金属学报, 2016, 52(2): 191-201.
[2] Manjiao CHEN,Jiankang HUANG,Cuicui HE,Yu SHI,Ding FAN. THERMODYNAMIC ANALYSIS OF THE FORMATION OF Fe-Al-Zn INTERMETALLIC COMPOUNDS IN Al/GALVANIZED STEEL INTERFACE[J]. 金属学报, 2016, 52(1): 113-119.
[3] LI Jinfu;YANG Gencang;ZHOU Yaohe (Stste Key Laboratory of Solidification Processing; Northwestern Polytechnical University; Xi'an 710072). GRAIN REFINEMENT IN UNDERCOOLED Ni-50%Cu ALLOY[J]. 金属学报, 1998, 34(2): 113-118.
[4] TONG Hingcun;SHEN Ningfu(Zhengzhou Instiiute of Technology)LIU Baicheng(Tsinghua University)(Manuscript received 17 September;1993). FORMATION AND DISTRIBUTION OF TiC PHASE IN RAPIDLY QUENCHED Al-3.18Ti-0.65C ALLOY[J]. 金属学报, 1994, 30(4): 155-159.
No Suggested Reading articles found!