Vol.6 No.5 (September 2016)
Effects of Solution Treatments on Microstructure and Texture of Mg-Gd-Y-Nd-Zr Alloy Extruded Plate
李国栋 ：苏州热工研究院有限公司设备管理部，广东 深圳
Effects of solution treatments on microstructure and texture of an extruded Mg-8Gd-4Y-Nd-Zr alloy plate were investigated using optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and texture testing. The results indicated that the grain growth occurred as the solution temperature increased and the solution time prolonged. The dynamic precipitates formed during extrusion dissolved into the matrix simultaneously as the solution processed. The grain growth rate was very low when the solution temperature was lower than 500˚C, while the grain growth rate increased rapidly when the sample solution treated at the temperature higher than 500˚C. The increase in grain growth rate was ascribed to the dissolution of dynamic precipitates, whose inhibiting effect on grain boundary migration decreased. The basal texture weakened while the prismatic texture strengthened as the solution processed. The strengthening in prismatic texture was attributed to the preferential growth of the prismatic texture component.
唐昌平 , 成声亮 , 李国栋 (2016) 固溶处理对Mg-Gd-Y-Nd-Zr合金挤压板材组织与织构的影响。 材料科学， 6， 277-284. doi: 10.12677/MS.2016.65036
 吴文祥, 靳丽, 董杰, 章桢彦, 丁文江. Mg-Gd-Y-Zr 高强耐热镁合金的研究进展[J]. 中国有色金属学报, 2011, 21(11): 4-13.
 吴玉娟, 丁文江, 彭立明, 曾小勤, 林栋樑. 高性能稀土镁合金的研究进展[J]. 中国材料进展, 2011, 30(2): 1-9.
 周伟, 李全安, 亢海娟, 王耀贵. Mg-Gd-Y-Zr系耐热镁合金的研究进展[J]. 稀有金属与硬质合金, 2012, 40(5): 51-56.
 He, S.M., Zeng, X.Q., Peng, L.M., Gao, X., Nie, J.F. and Ding, W.J. (2006) Precipitation in a Mg-10Gd-3Y-0.4Zr (wt.%) Alloy during Isothermal Ageing at 250˚C. Journal of Alloys and Compounds, 421, 309-313.
 Gao, X., He, S.M., Zeng, X.Q., Peng, L.M., Ding, W.J. and Nie, J.F. (2006) Microstructure Evolution in a Mg- 15Gd-0.5Zr (wt.%) Alloy during Isothermal Aging at 250˚C. Materials Science and Engineering: A, 431, 322-327.
 Zhang, X.M., Tang, C.P., Deng, Y.L., Yang, L. and Liu, W.J. (2011) Phase Transformation in Mg-8Gd-4Y-Nd-Zr Alloy. Journal of Alloys and Compounds, 509, 6170-6174.
 Zheng, J.X., Xu, X.S., Zhang, K.Y. and Chen, B. (2015) Novel Structures Observed in Mg-Gd-Y-Zr during Isothermal Ageing by Atomic-Scale HAADF-STEM. Materials Letters, 152, 287-289.
 Zheng, J.X., Li, Z., Tan, L.D., Xu, X.S., Luo, R.C. and Chen, B. (2016) Precipitation in Mg-Gd-Y-Zr Alloy: Atomic- Scale Insights into Structures and Transformations. Materials Characterization, 117, 76-83.
 Xu, C., Zheng, M.Y., Wu, K., Wang, E.D., Fan, G.H., Xu, S.W., Kamado, S., Liu, X.D., Wang, G.J. and Lv, X.Y. (2013) Effect of Ageing Treatment on the Precipitation Behaviour of Mg-Gd-Y-Zn-Zr Alloy. Journal of Alloys and Compounds, 550, 50-56.
 Tang, C.P., Yang, L., Feng, D., Deng, Y.L. and Zhang, X.M. (2012) Investigation on Microstructure and Mechanical Properties of a Mg-Gd-Y-Zr Alloy Plate. Materials and Manufacturing Processes, 27, 609-613.
 Xiao, H.C., Tang, B., Liu, C.M., Gao, Y.H., Yu, S.L. and Jiang, S.N. (2015) Dynamic Precipitation in a Mg-Gd-Y-Zr Alloy during Hot Compression. Materials Science and Engineering: A, 645, 241-247.
 Yang, X.B., Chen, J.H., Liu, J.Z., Liu, P., Qin, F., Cheng, Y.L. and Wu, C.L. (2013) Spherical Constituent Particles Formed by a Multistage Solution Treatment in Al-Zn-Mg-Cu Alloys. Materials Characterization, 83, 79-88.
 Peng, G.S., Chen, K.H., Chen, S.Y. and Fang, H.C. (2014) Evolution of the Second Phase Particles during the Heating-Up Process of Solution Treatment of Al-Zn-Mg-Cu Alloy. Materials Science and Engineering: A, 641, 237-241.
 Gao, Y., Wang, Q.D., Gu, J.H., Zhao, Y. and Tong, Y. (2007) Behavior of Mg-15Gd-5Y-0.5Zr Alloy during Solution Heat Treatment from 500 to 540˚C. Materials Science and Engineering: A, 459, 117-123.