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首页> 外文期刊>Materials Science and Engineering >Precipitation of Al_3Zr by two-step homogenization and its effect on the recrystallization and mechanical property in 2195 Al-Cu-Li alloys
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Precipitation of Al_3Zr by two-step homogenization and its effect on the recrystallization and mechanical property in 2195 Al-Cu-Li alloys

机译：通过两步均匀化沉淀Al_3ZR及其对2195α-Cu-Li合金中重结晶和机械性能的影响

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摘要

To improve the recrystallization resistance of 2195 Al-Cu-Li alloys, we proposed a two-step homogenization (TS) to facilitate the homogeneous nucleation of Al_3Zr, and the effect of Al_3Zr precipitate on the recrystallization behavior and on the strength and ductility of 2195 alloys were investigated. It is shown that the first low-temperature homogenization in TS promotes the nucleation of Al_3Zr due to large driving force, and second high-temperature homogenization helps to accelerate diffusion process of Zr, resulting in fine and dense Al_3Zr distribution (radius of 22.6 ± 4.1 nm and number density of 1.94 × 10~(20)/m~3). As a result, the recrystallization resistance of 2195 alloys is significantly improved comparing with those treated by the traditional one-step homogenization (OS). The TS alloys exhibits best yield strength (566.7 MPa), tensile strength (598.8 MPa) and elongation of 11.9% comparing with OS alloys. The strength improvement of TS 2195 alloys mainly originates from Orowan mechanism and grain refinement induced by Al_3Zr precipitate. The remained deformed lamellar structure in TS alloys effectively deflectes and zigzags the propagation of cracks, which is beneficial to the energy dissipation, leading to the enhancement of ductility.
机译：为了改善2195α-Cu-Li合金的再结晶性，我们提出了两步均质化（TS）以促进Al_3ZR的均匀成核，Al_3ZR沉淀物对重结晶行为的影响以及2195的强度和延展性合金被研究。结果表明，由于大大驱动力，TS的第一低温均质化促进AL_3ZR的成核，第二高温均质化有助于加速Zr的扩散过程，导致细致密的AL_3ZR分布（半径为22.6±4.1 NM和数量密度为1.94×10〜（20）/ m〜3）。结果，与通过传统的一步均质化（OS）处理的那些，显着改善了2195个合金的重结晶电阻。 TS合金表现出最佳屈服强度（566.7MPa），拉伸强度（598.8MPa）和与OS合金相比的11.9％伸长率。 TS 2195合金的强度改善主要来自Al_3ZR沉淀物诱导的orowan机制和晶粒细化。 TS合金中残留的变形层状结构有效地偏转和曲折的裂缝的传播，这有利于能量耗散，导致延展性的增强。

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  • 来源
    《Materials Science and Engineering》 |2021年第21期|141637.1-141637.10|共10页
  • 作者

    Qibing Liu; Genlian Fan; Zhanqiu Tan; Zhiqiang Li; Di Zhang; Jia Wang; Hao Zhang;

  • 作者单位

    State Key Laboratory of Metal Matrix Composites School of Material Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China;

    State Key Laboratory of Metal Matrix Composites School of Material Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China;

    State Key Laboratory of Metal Matrix Composites School of Material Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China;

    State Key Laboratory of Metal Matrix Composites School of Material Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China;

    State Key Laboratory of Metal Matrix Composites School of Material Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China;

    Jiangsu Haoran Spray Forming Alloy Co. Ltd. Zhenjiang 212009 China;

    State Key Laboratory of Metal Matrix Composites School of Material Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China Jiangsu Haoran Spray Forming Alloy Co. Ltd. Zhenjiang 212009 China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Al-Li alloys; Homogenization; Recrystallization resistance; Mechanical property;

    机译：Al-Li合金;均匀化;重结晶抗性;机械性质;

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