Transactions of Materials and Heat Treatment

Title：Mechanics behavior and constitutive equation of AZ31B magnesium alloy at hot compression

Authors： CHEN Fu-xiao GUO Yun-han GUO Jun-qing SUN Fu-tao

Unit： Henan University of Science and Technology Luoyang Qinhan Cold Forging Co. Ltd.

KeyWords： AZ31B magnesium alloy hot compression flow stress constitutive equation activation energy

ClassificationCode：AZ31BAZ31B

year,vol(issue):pagenumber：2011,36(5):144-148

Abstract：

Hot compression tests of AZ31B magnesium alloy were performed in the deformation temperature range from 280 to 440℃ and strain rate range from 0.001 to 0.1s-1. The influence of deformation, strain rate and deformation temperature on flow stress was also analyzed. The results show that the flow stress of this alloy is very sensitive to deformation temperature and str ain rate, and decreases as deformation temperature increasing, and increases with increasing of the stain rate. However, no significant change of flow stress is observed at the temperature of 440℃ and the strain rate below 0.01s-1. The hot deformation activation energy of the alloy is 141.6kJ·mol-1.

Funds：

河南省科技攻关项目“镁合金轮毂精密成形技术”（072102230007）

Reference：

[1]黎文献.镁及镁合金[M].长沙:中南大学出版社,2005.

[2]叶久新,陈明安.镁合金及其成型技术在工业中的应用[J].湖南大学学报,2002,29(3): 112-116.

[3]张土宏,王忠堂.镁合金的塑性加工技术[J].金属成形工艺,2002,21(5):1-4.

[4]Somekawa H, Konzu M, Tanabe S, et al. The press formability in magnesium alloy AZ31[J]. Mater. Sci. Forum, 2000，350351:177-182.

[5]Lee S, Chen Y H, Wang J Y. Isothermal sheet formability of magnesium alloy AZ31 and AZ61[J]. Journal of Materials Processing Technology, 2002, 124(12):19-24.

[6]陈振华，许芳艳，傅定发,等. 镁合金的动态再结晶[J]. 化工进展， 2006, 25(2): 140-146.

[7]Sheppard T , Parson N C ,Zaidi M A. Dynamic recrystallization in Al|7Mg[J]. Met.Sci., 1983 , 17(10):481.

[8]Sheng Z Q, Shivpur R. Modeling flow stress of magnesium alloys at elevated temperature[J]. Materials Science and Engineering, 2006，A419 ,202-208.

[9]罗吉荣,吴树森，夏巨谌，等.对当前镁合金研究与应用的几点认识[A]. 2001年中国压铸、挤压铸造、半固态加工学术年会论文集[C].烟台，2001.

[10]Sellars C M.Modeling microstructural development during hot rolling[J]. Materials Science and technology,1990, 6:1072.

[11]Milovic R, Manojlovic D, Andjelic M. Hot workability of M2 type high-speed steel[J]. Steel Research,1992, 63(2):78-84.

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