为提高Mg-9Gd-4Y-0.6Zr合金的强度,研究了不同温度下的挤压组织对合金力学性能的影响.结果表明,随着挤压温度从500℃降低到400℃,其晶粒度也从126 μm细化到7.4 μm,抗拉强度和延伸率分别从200.1MPa和2.93%提高到312.4 MPa和5.6%.通过力学性能和晶粒尺寸之间的关系计算出该合金的Hall-Petch常数Ky为327.6 MPa·μm1/2,明显高于纯镁及常规镁合金的Ky.大量稀土元素的固溶及其第二相粒子对晶界和位错运动的阻碍作用是合金Ky值较高的主要原因.
参考文献
| [1] | 余琨,黎文献,王日初,马正青.变形镁合金的研究、开发及应用[J].中国有色金属学报,2003(02):277-288. |
| [2] | 张新明,彭卓凯,陈健美,邓运来.耐热镁合金及其研究进展[J].中国有色金属学报,2004(09):1443-1450. |
| [3] | Aghion E.;Bronfin B. .Magnesium Alloys Development towards the 21~(st) Century[J].Materials Science Forum,2000(0):19-28. |
| [4] | Mordike B L;Ebert T .Magnesium properties-application-potential[J].Materials Science and Engineering A,2001,A302:37-45. |
| [5] | Cahn R W;丁道云.非铁合金的结构和性能[M].北京:科学出版社,1999:109-114. |
| [6] | Ifeanyi Anthony Anyanwu;Shigeharu Kamado;Yo Kojima .Creep Properties of Mg-Gd-Y-Zr Alloys[J].Materials transactions,2001(7):1212-1218. |
| [7] | Ifeanyi Anthony Anyanwu;Shigeharu Kamado;Yo Kojima .Aging Characteristics and High Temperature Tensile Properties of Mg-Gd-Y-Zr Alloys[J].Materials transactions,2001(7):1206-1211. |
| [8] | Shigeru I;Yuji N;Shigeharu K et al.Age hardening characteristics and high temperature tensile properties of Mg-Gd and Mg-Dy alloys[J].Japanese Journal of Institute of Light Metals(Japan),1994,44(01):3-8. |
| [9] | Shigeharu K;Yutaka K;Yoshitada H .High temperature deformation characteristics and forgeability of Mgheavy rare earth element-Zr alloys[J].Japanese Journal of Institute of Light Metals(Japan),1998,48(04):168-173. |
| [10] | Kawabata T;Matsuda K;Kamado S.HRTEM observation of the precipitates in Mg-Gd-Y-Zr alloy[J].Materials Science Forum,2003(419-422):303-306. |
| [11] | Rokhlin L L;Nikitina N I .Mg-Gd and Mg-Gd-Y alloys[J].Zeitschrift fur Metallkunde,1994,85(12):819-823. |
| [12] | Drits M E;Sviderkaya Z A;Rokhlin L L et al.Effect of alloying on properties of Mg-Gd alloys[J].Metal Science and Heat Treatment,1979,21(11):62-64. |
| [13] | 彭卓凯,张新明,陈健美,肖阳,蒋浩,邓桢桢.Mn,Zr对Mg-Gd-Y合金组织与力学性能的影响[J].中国有色金属学报,2005(06):917-922. |
| [14] | Z.-K. Peng;X.-M. Zhang;J.-M. Chen .Grain refining mechanism in Mg-9Gd-4Y alloys by zirconium[J].Materials Science and Technology: MST: A publication of the Institute of Metals,2005(6):722-726. |
| [15] | 陈振华;严红革;陈吉华.镁合金[M].北京:化学工业出版社,2004:202-205. |
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