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微量Sc对2197铝锂合金组织和力学性能的影响

Effect of Sc on Microstructure and Mechanical Properties of 2197 Al-Li Alloy

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【作者】 黄兰萍; 郑子樵; 黄永平; 钟莉萍;

【Author】 HUANG Lan-ping~1, ZHENG Zi-qiao~2,HUANG Yong-ping~3,ZHONG Li-ping~4 (1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China; 2.School of Materials Science and Engineering, Central South University, Changsha 410083, China; 3.Department of Applied Chemistry and Environmental Science, Changsha University, Changsha 410003, China; 4.School of Industry, Central South Forestry University, Zhuzhou 412006, China)

【机构】 中南大学粉末冶金国家重点实验室; 中南大学材料科学与工程学院; 长沙大学应用化学与环境科学系; 中南林学院工业学院 湖南长沙; 410083; 湖南长沙; 410003; 湖南株洲; 412006;

【摘要】 研究了微量Sc对Al Li Cu系2197合金的显微组织和拉伸性能的影响。采用拉伸试验和透射电镜等方法对样品进行了力学性能测试和微观组织分析。研究结果表明,δ′(Al3Li),θ′(Al2Cu)和T1(Al2CuLi)相仍为含 Sc 2197合金的主要强化相;添加微量Sc使合金析出初生和次生Al3Sc颗粒,时效过程中δ′相依附在Al3Sc颗粒上析出、长大,形成Al3Li/Al3Sc复合沉淀相,但这2种颗粒的存在并未明显提高热处理可强化的2197合金的强度和塑性。

【Abstract】 The effects of Sc on microstructure and tensile properties of 2197 alloy were studied. The measurements of properties and TEM results show that the addition of trace Sc can not obviously improve the strength and ductility of 2197 alloy. δ′(Al3Li), θ′(Al2Cu) and T1(Al2CuLi) phases are still main strengthening phases in the Sc-containing alloy. Moreover, Al3Sc particles and composite Al3Sc/Al3Li particles precipitate in the alloys containing Sc, but the two kinds of particles do not evidently improve the strength and plastic property of 2197 alloy.

【关键词】 2197合金; Sc; 显微组织; 拉伸性能;
【Key words】 Al-Li alloy; Sc; microstructure; tensile property;
  • 【文献出处】 中南大学学报(自然科学版) ,Journal of Central South University of Technology(Natural Science) , 编辑部邮箱 ,2005年01期
  • 【分类号】TG113
  • 【被引频次】8
  • 【下载频次】223
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